AS8222

high
performance
needs great
design.
Datasheet: AS8222 Enhanced FlexRay Standard Transceiver
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AS8222
E n h a n c e d F l e x R a y S t a n d a r d Tr a n s c e i v e r
1 General Description
The AS8222 is a high-speed fault tolerant device operating as
interface between a generic FlexRay Communication Controller and
the copper wiring.
This device is the first FlexRay certified Transceiver for temperature
ranges up to 150°C ambient temperature. For bare-die deliveries
please contact ams for more information.
The AS8222 is designed to extend the application range for high
speed and safety critical time triggered bus systems in an
automotive environment. The bus driver is protected against short
circuits to the supply and GND. The AS8222 operates at baudrates
up to 10 Mbps and is fully conforming to the FlexRay Electrical
Physical Layer Specification V2.1 Rev B.
The AS8222 provides a host controller interface consisting of Enable
(EN) and Standby (STBN) input pins for mode handling by the
microcontroller and the Error (ERRN) output pin, signalling failures
and status information.
Interface with optional bus guardian for bus supervision
Automatic thermal shutdown protection
Supports 12, 24V systems with low sleep current consumption
Integrated power management system
Two INH pins for the external voltage regulators control
Local wake-up input
Remote wake-up capability via FlexRay bus in sleep mode
Supports 2.5, 3, 3.3, 5 V microcontrollers and automatically
adapts to interface levels
Does not disturb the bus line if not powered
Protected against damage due to short circuit conditions on the
bus (positive and negative battery voltage)
Small Pb-free package: SSOP-20
Automotive qualified to AEC-Q100, grade 0
For bare-die deliveries please contact us.
The device supports the NORMAL mode with activated FlexRay bus
transmitter and receiver, the RECEIVE_ONLY mode with activated
receiver only to avoid unwanted disturbances while listening to the
communication and the low-power modes STANDBY and SLEEP
with very low power consumption.
3 Applications
In case of undervoltage at one of the supply voltages (VBAT, VCC,
and VIO) the device will change its mode to a low-power mode
(either STANDBY or SLEEP mode) and the device will signal an
error accordingly. In case of low voltage is detected on both VBAT
and VCC the device will enter the POWER-OFF mode.
The device addresses all ECUs connected to the permanent battery
supply (terminal 30).
Ensuring application in safety critical environments a two wire busguardian interface is implemented where additional redundant
circuitries on the electronic-control-unit can monitor the
communication on the receive enable output (RxEN) and can
activate and deactivate through the bus guardian enable input (BGE)
the transmitter. Additionally in low-power modes the wake conditions
at the RxEN pin can be monitored.
The AS8222 FlexRay Standard Transceiver is best fitting for
automotive FlexRay nodes where bus wake-up and voltage regulator
control for voltage supplies is needed.
The device is best suited for high temperature applications with up to
150°C.
A thermal sensor circuit with an integral shutdown mechanism
prevents damage to the device in extreme temperature conditions.
2 Key Features
Data transfer up to 10 Mbps
Compliant with FlexRay Electrical Physical Layer Specification
V2.1 Rev. B
Wide operating ambient temperature range -40°C to +150°C
Excellent EMC performance
High common mode range insures excellent EMI immunity
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AS8222
Datasheet - A p p l i c a t i o n s
Figure 1. AS8222 Enhanced FlexRay Standard Transceiver Block Diagram
VIO
AS8222
Bus Failure Detector
STBN
EN
Host Controller Interface
ERRN
VIO
RxD
TxD
TxEN
Communication
Controller
Interface
BGE
Bus Guardian
Interface
RxEN
BP
Digital Logic
Transmitter
BM
Receiver
VBAT
VBAT
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Revision 1.0
WAKE
GND
VIO
VBAT
INH2
Wake-Up
Detector
Power Supply Interface
VCC
INH1
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AS8222
Datasheet - C o n t e n t s
Contents
1 General Description ..................................................................................................................................................................
1
2 Key Features............................................................................................................................................................................
1
3 Applications...............................................................................................................................................................................
1
4 Pin Assignments .......................................................................................................................................................................
5
4.1 Pin Descriptions....................................................................................................................................................................................
5
5 Absolute Maximum Ratings ......................................................................................................................................................
6
6 Electrical Characteristics...........................................................................................................................................................
8
6.1 Supply Voltage......................................................................................................................................................................................
8
6.2 State Transitions..................................................................................................................................................................................
9
6.3 Transmitter............................................................................................................................................................................................
9
6.4 Receiver .............................................................................................................................................................................................
11
6.5 Wake-up Detector...............................................................................................................................................................................
13
6.6 Supply Voltage Monitor.......................................................................................................................................................................
14
6.7 Bus Error Detection ............................................................................................................................................................................
15
6.8 Over Temperature...............................................................................................................................................................................
15
6.9 Power Supply Interface ......................................................................................................................................................................
15
6.10 Communication Controller Interface .................................................................................................................................................
15
6.11 Host Interface ...................................................................................................................................................................................
17
6.12 Bus Guardian Interface.....................................................................................................................................................................
18
6.13 Read Out Interface ...........................................................................................................................................................................
7 Detailed Description................................................................................................................................................................
18
19
7.1 Block Description................................................................................................................................................................................
19
7.2 Events.................................................................................................................................................................................................
19
7.3 Operating Modes ................................................................................................................................................................................
19
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
NORMAL Mode .........................................................................................................................................................................
RECIEVE-ONLY Mode ..............................................................................................................................................................
STANDBY Mode........................................................................................................................................................................
GO-TO-SLEEP Mode ................................................................................................................................................................
SLEEP Mode .............................................................................................................................................................................
7.4 Non-Operating Modes ........................................................................................................................................................................
20
20
20
20
20
20
7.4.1 POWER-OFF Mode................................................................................................................................................................... 20
7.5 Undervoltage Events ..........................................................................................................................................................................
20
7.5.1 Undervoltage / Voltage Recovery VBAT .................................................................................................................................... 21
7.5.2 Undervoltage / Voltage Recovery VIO ....................................................................................................................................... 21
7.5.3 Undervoltage / Voltage Recovery VCC ...................................................................................................................................... 21
7.6 Power On/Off Events..........................................................................................................................................................................
21
7.7 Wake-Up Events.................................................................................................................................................................................
21
7.7.1 Remote Wake-Up Event ............................................................................................................................................................ 21
7.7.2 Remote Wake-up with Frames .................................................................................................................................................. 21
7.7.3 Local Wake-Up Event ................................................................................................................................................................ 22
7.8 Over-temperature Events ...................................................................................................................................................................
22
7.9 System Description.............................................................................................................................................................................
23
7.10 Fail Silent Behaviour.........................................................................................................................................................................
24
7.10.1 RxEN / BGE Timeout............................................................................................................................................................... 24
7.10.2 State Transitions due to Undervoltage Detection .................................................................................................................... 24
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AS8222
Datasheet - C o n t e n t s
7.10.3 State Transitions due to Voltage Recovery Detection ............................................................................................................. 24
7.11 Mode Transitions ..............................................................................................................................................................................
24
7.11.1 Error Pin Signalling .................................................................................................................................................................. 27
7.12 Loss of Ground .................................................................................................................................................................................
7.13 ERROR Flags Description................................................................................................................................................................
7.13.1 Undervoltage Detected VBAT Flag ..........................................................................................................................................
7.13.2 Undervoltage Detected VIO Flag .............................................................................................................................................
7.13.3 Undervoltage Detected VCC Flag............................................................................................................................................
7.13.4 Bus Error..................................................................................................................................................................................
7.13.5 Bus Open Line .........................................................................................................................................................................
7.13.6 BP Short Circuit to VCC ...........................................................................................................................................................
7.13.7 BP Short Circuit to GND ..........................................................................................................................................................
7.13.8 BM Short Circuit to VCC ..........................................................................................................................................................
7.13.9 BM Short Circuit to GND..........................................................................................................................................................
7.13.10 Short Circuit between BP and BM .........................................................................................................................................
7.13.11 Over-temperature ..................................................................................................................................................................
7.13.12 TxEN_BGE Timeout ..............................................................................................................................................................
7.13.13 Error Flag...............................................................................................................................................................................
7.14 STATUS Flags Description ...............................................................................................................................................................
27
27
27
27
27
27
27
27
28
28
28
28
28
28
28
28
7.14.1 Local and Remote Wake Flag ................................................................................................................................................. 28
7.14.2 Power on Flag.......................................................................................................................................................................... 28
7.14.3 BGE Status .............................................................................................................................................................................. 28
7.15 Error and Status Flags Read Out .....................................................................................................................................................
8 Bus Driver ...............................................................................................................................................................................
29
30
8.1 AS8222 Bus States ............................................................................................................................................................................
30
8.2 Transceiver Timing .............................................................................................................................................................................
30
8.3 Transmitter..........................................................................................................................................................................................
31
8.4 Receiver .............................................................................................................................................................................................
33
8.4.1 Bus activity and idle detection (only in NORMAL and RECEIVE ONLY mode)......................................................................... 33
8.4.2 Bus Data Detection (Only in NORMAL and RECEIVE ONLY Mode) ........................................................................................ 34
8.4.3 Receiver Test Signal.................................................................................................................................................................. 35
9 Test circuits .............................................................................................................................................................................
36
9.1 ISO7637-2 Test Pulses - Class D .......................................................................................................................................................
36
9.2 Application Circuit...............................................................................................................................................................................
37
10 Appendix...............................................................................................................................................................................
38
10.1 FlexRay Functional Classes .............................................................................................................................................................
38
10.2 FlexRay Parameter Comparison ......................................................................................................................................................
38
11 Package Drawings and Markings..........................................................................................................................................
39
12 Ordering Information.............................................................................................................................................................
40
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AS8222
Datasheet - P i n A s s i g n m e n t s
4 Pin Assignments
The AS8222 is available in SSOP-20 5.3mm.
Figure 2. Pin Assignments (Top View)
INH2
1
20
-
INH1
2
19
VCC
EN
3
18
BP
17
BM
GND
VIO
4
TxD
5
AS8222
16
TxEN
6
(SSOP20)
15
WAKE
RxD
7
14
VBAT
BGE
8
13
ERRN
STBN
9
12
RxEN
-
10
11
-
4.1 Pin Descriptions
Table 1. SSOP-20 Pin Descriptions
Pin Name
Pin Number
INH2
1
INH1
2
EN
3
Digital Input with Pull-down
VIO
4
Supply
TxD
5
Digital Input with Pull-down
TxEN
6
Digital Input with Pull-up
RxD
7
Digital Output
BGE
8
STBN
9
Reserved
10
Analog/digital Input/output
with Pull-down
Not used
11
-
RxEN
12
ERRN
13
VBAT
14
Supply
WAKE
15
Analog I/O
GND
16
Supply
BM
17
BP
18
VCC
19
Supply
Not used
20
-
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Pin Type
Analog I/O
Digital Input with Pull-down
Digital Output
Analog I/O
Description
Analog Output. Inhibit 2 output for switching external voltage regulator
Analog Output. Inhibit 1 output for switching external voltage regulator
Digital Input. Enable input
Supply Voltage. I/O supply voltage
Digital Input. Transmit data input
Digital Input. Transmitter enable input
Digital Output. Receive data output
Digital Input. Bus guardian enable input
Digital Input. Standby input
To be connected to GND or to be unconnected
Digital Output. Receive data enable output
Digital Output. Error diagnosis output and wake status output
Supply Voltage. Battery supply voltage
Analog Input. Local wake-up input
Ground
Analog Input/Output. Bus line Minus
Analog Input/Output. Bus line Plus
Supply voltage.
-
Revision 1.0
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AS8222
Datasheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only. Functional operation of the
device at these or any other conditions beyond those indicated in Absolute Maximum Ratings is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
Note: All voltages are referred to pin GND.
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Units
Note
Battery Supply Voltage
-0.3
+50
V
-0.3
+7.0
V
-0.3
+7.0
V
DC Voltage at EN, STBN, ERRN,
TxD, RxD, TxEN, BGE, RxEN
-0.3
VIO +0.3
V
DC Voltage on pin WAKE, INH1, INH2
-0.3
VBAT +0.3
DC Voltage at BP and BM
-40
+40
V
Input current (latchup immunity)
-100
100
mA
According to JEDEC 78
Electrical Parameters
VBAT
VCC
Supply Voltage
VIO
VIO < VCC
Electrostatic Discharge
ESD
Electrostatic Discharge
±2
kV
All pins
AEC-Q100-002 (HBM)
uESDInt
2
kV
ESD on all other pins
Electrostatic Discharge
±4
kV
For VBAT, GND, WAKE
AEC-Q100-002 (HBM)
uESDExt
4
kV
ESD protection on pins that lead to ECU
external terminals
Electrostatic Discharge
±6
kV
BP, BM
AEC-Q100-002 (HBM)
uESDExt
4
kV
ESD protection on pins that lead to ECU
external terminals
Electrostatic Discharge
±6
kV
BP, BM
FlexRay Physical Layer EMC Measurement
Specification Version 3.0
±500
V
±750
V
±100
V
Electrostatic Discharge
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Revision 1.0
On all pins
AEC-Q100-011 (Charge Device Model)
At the corner pins
AEC-Q100-011 (Charge Device Model)
On all pins
AEC-Q100-003 (Machine Model)
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AS8222
Datasheet - A b s o l u t e M a x i m u m R a t i n g s
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Units
Note
V
ISO7637-2 test pulse 1; class D
(see Figure 14)
V
ISO7637-2 test pulses 2a; class D
(see Figure 14)
V
ISO7637-2 test pulses 3a; class D
(see Figure 14)
+100
V
ISO7637-2 test pulses 3b; class D
(see Figure 14)
150
mW
+150
ºC
260
ºC
85
%
Damage Tests
-100
Us
Transient voltage on VBAT, Bus and
Wake pins (damage tests)
+75
-150
Power Dissipation
Pt
Total power dissipation (all supplies
and outputs)
Temperature Ranges and Storage Conditions
Tstrg
Storage temperature
-55
TBODY
Package body temperature
H
Humidity non-condensing
MSL
Moisture Sensitivity Level
1
2
5
3
1. The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020 “Moisture/Reflow
Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. The lead finish for Pb-free leaded packages is matte tin
(100% Sn).
2. Represents a maximum floor life time of 168h.
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
In this specification, all the defined tolerances for external components are assured over the whole operation conditions range as well as over
lifetime.
Operation Range:
TAMB=-40ºC to +150ºC, VCC=+4.75V to +5.25V, VBAT=5.5V to +40V, VIO=+2.2 to VCC, RL=40Ω, CL= 100pF unless otherwise specified.
6.1 Supply Voltage
Table 3. Supply Voltage
Symbol
Parameter
TAMB
Conditions
Min
Typ
Max
Units
Ambient temperature
-40
+25
+150
ºC
T
Ambient temperature
-40
+125
ºC
VCC-VIO
Difference of supplies
-0.1
3.05
V
VBAT=12V; SLEEP mode;
IBAT
VBAT current consumption
(standard transceiver only)
0
30
50
µA
0
80
170
µA
0
0.24
1
mA
-5
10
20
µA
Non-low-power mode: NORMAL, driver
enabled
15
25
45
mA
Non-low-power mode: NORMAL, driver
enabled; RBUS= ∞Ω
3
7
15
mA
Non-low-power mode: RECEIVE-ONLY
1
2
10
mA
-5
2
20
µA
0
0.02
1
mA
TAMB<125ºC
1
VBAT=12V; SLEEP mode
1
Non-low-power modes
Low-power modes; VCC = 0 V to +5.25V
ICC
IIO
VCC current consumption
VIO current consumption
Low-power Modes; VIO = 0 V to +5.25V
Non-low-power Modes
1
1
1. EN, STBN, ERRN, TxD, RxD, TxEN, BGE, RxEN, WAKE, INH1, INH2: open.
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.2 State Transitions
Table 4. State Transitions
Symbol
Parameter
tSTBN_RXD
Conditions
Min
Typ
Max
Units
Delay STBN high to RxD high with wake
flag set
1
10
50
µs
tSTBN_RXEN
Delay STBN high to RxEN high with wake
flag set
1
10
50
µs
tSLEEP_INH1
Delay STBN high to INH1 high
INH1 high = 80 % VBAT
1
10
50
µs
tSTANDBY_INH2
Delay STBN high to INH2 high
INH2 high = 80 % VBAT
1
10
50
µs
tSLEEP
go-to-sleep hold time
INH1 low = 20 % VBAT
10
25
70
µs
6.3 Transmitter
The following parameters are applicable to all the branch transmitters.
Table 5. Transmitter
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VBUS_DIFF_D0
Differential bus voltage low in NORMAL
mode (Data_0)
VBPdata0 – VBMdata0;
40 Ω < RL < 55 Ω
-2
-1
-0.6
V
uBDTxactive
Absolute value of uBus, while sending
Load on BP/BM: 40Ω || 100pF
|2000|
|600|
mV
VBUS_DIFF_D1
Differential bus voltage high in
NORMAL mode (Data_1)
VBPdata1 – VBMdata1;
40 Ω < RL < 55 Ω
0.6
2
V
uBDTxactive
Absolute value of uBus, while sending
Load on BP/BM: 40Ω || 100pF
|600|
|2000|
mV
ΔVBUS_DIFF
Matching between Data_0 and Data_1
differential bus voltage in NORMAL
mode
VBUS_DIFF_D0 - VBUS_DIFF_D1
40 Ω < RL < 55 Ω
-200
200
mV
VBUS_COM_D0
Common mode bus voltage in case of
Data_0 in non-low-power mode
VBPdata0/2+VBMdata0/2
40 Ω < RL < 55 Ω
0.4 * VCC 0.5 * VCC 0.6 * VCC
V
VBUS_COM_D1
Common mode bus voltage in case of
Data_1 in non-low-power mode
VBPdata1/2+VBMdata1/2
40 Ω < RL < 55 Ω
0.4 * VCC 0.5 * VCC 0.6 * VCC
V
ΔV BUS_COM
Matching between Data_0 and Data_1
common mode voltage
VBUS_COM_D0 - VBUS_COM_D1
40 Ω < RL < 55 Ω
VBUS_DIFF_Idle
Absolute differential bus voltage in idle
mode
40 Ω < RL < 55 Ω
uBDTxidle
Absolute value of uBus, while Idle
IBPBMShortMax
IBMBPShortMax
Absolute max current when BP shorted
to BM
IBPBMShortMax
IBMBPShortMax
Absolute maximum output current when
BP
shorted to BM
IBPGNDShortMax
Absolute max current when BP is
shorted to GND
IBPGNDShortMax
Absolute maximum output current when
shorted to GND
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-200
1
0
0
200
mV
0
30
mV
30
mV
+100
mA
100
mA
+100
mA
100
mA
0
VBP= VBM
VBP=0 V
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 5. Transmitter
Symbol
Parameter
Conditions
IBMGNDShortMax
Absolute max current when BM is
shorted to GND
VBM=0 V
IBMGNDShortMax
Absolute maximum output current when
shorted to GND
IBP-5VShortMax
Absolute max current when BP is
shorted to -5 V
IBP-5VShortMax
Absolute maximum output current when
shorted to –5V
IBM-5VShortMax
Absolute max current when BM is
shorted to -5 V
IBM-5VShortMax
Absolute maximum output current when
shorted to –5V
IBP27VShortMax
Absolute max current when BP is
shorted to 27 V
IBPBAT27ShortMax
Absolute maximum output current when
shorted to 27V
IBM27VShortMax
Absolute max current when BM is
shorted to 27 V
IBMBAT27ShortMax
Absolute maximum output current when
shorted to 27V
IBP40VShortMax
Absolute max current when BP is
shorted to 40 V
VBP=40 V
IBM40VShortMax
Absolute max current when BM is
shorted to 40 V
tTXD_BUS01
Delay time from TxD to BUS positive
edge
dBDTx01
Transmitter delay, positive edge
tTXD_BUS10
Delay time from TxD to BUS negative
edge
dBDTx10
Transmitter delay, negative edge
tTXD_MISMATCH
Delay time from TxD to BUS mismatch
dTxAsym
Transmitter delay mismatch
| dBDTx10 - dBDTx01 |
tBUS_TX10
Fall time differential bus voltage
dBusTx10
Fall time differential bus voltage
(80% → 20%)
tBUS_TX01
Rise time differential bus voltage
dBusTx01
Rise time differential bus voltage
(20% → 80%)
tTXEN_BUS_Idle_Active
Delay time from TxEN to bus active
dBDTxia
Propagation delay idle → active
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Min
Typ
Max
Units
50
+100
mA
100
mA
+100
mA
100
mA
+100
mA
100
mA
+100
mA
100
mA
+100
mA
100
mA
75
+100
mA
VBM=40 V
75
+100
mA
triseTxD = 5 ns
25
50
ns
100
ns
50
ns
100
ns
4
ns
4
ns
18.75
ns
18.75
ns
18.75
ns
18.75
ns
50
ns
100
ns
VBP=-5 V
50
VBM=-5 V
50
VBP=27 V
60
VBM=27 V
60
tfall TxD = 5 ns
tTxD_BUS10 – tTxD_BUS01
80 % - 20 % of VBUS;
RL=45 Ω; CL= 100 pF
25
-4
3.75
0
13
3.75
20 % - 80 % of VBUS;
RL=45 Ω; CL= 100 pF
3.75
13
3.75
RL=45 Ω; CL= 100 pF
Revision 1.0
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 5. Transmitter
Symbol
Parameter
Conditions
tTXEN_BUS_Active_Idle
Delay time from TxEN to bus idle
RL=45 Ω; CL= 100 pF
dBDTxai
Propagation delay active → idle
tTXEN_MISMATCH
Delay time from TxEN to BUS mismatch
dBDTxDM
| dBDTxia - dBDTxai |
tBGE_BUS_IdleActive
Delay time from BGE to bus active
dBDTxia
Propagation delay idle → active
tBGE_BUS_Active_Idle
Delay time from BGE to bus idle
dBDTxai
Propagation delay active → idle
Min
| tTXEN_BUS_Idle_Active tTXEN_BUS_Active_Idle |;
RL=45 Ω; CL= 100 pF
Typ
Max
Units
18
50
ns
100
ns
50
ns
50
ns
50
ns
100
ns
50
ns
100
ns
30
ns
30
ns
30
ns
30
ns
0
18
18
tBUS_Idle_Active
Differential bus voltage transition time:
idle to active
dBusTxia
Transition time idle → active
tBUS_Active_Idle
Differential bus voltage transition time:
active to idle
dBusTxai
Transition time active → idle
tTxEN_timeout
TxEN timeout
RL=45 Ω; CL= 100 pF
5
RL=45 Ω; CL= 100 pF
2
3
5
10
ms
6.4 Receiver
The following parameters are applicable to all the branch receivers.
Table 6. Receiver
Symbol
Parameter
Conditions
Min
Typ
Max
Units
RBP, RBM
BP, BM input resistance
Idle mode; RBUS= ∞
10
25
40
kΩ
40
kΩ
80
kΩ
RCM1, RCM2
Receiver common mode input
resistance
RDIFF
BP, BM differential input resistance
VBP, VBM
Common mode voltage range
-10
+15
V
uCM
Common mode voltage range (with
respect to GND) that does not disturb
the receive function
-10
+15
V
VBPidle, VBMidle
Idle voltage in non-low-power modes
on pin BP, BM
0.6*VCC
V
uBias
Bus bias voltage during BD_Normal
mode
3200
mV
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10
Idle mode; RBUS= ∞
Non-low-power modes; VTXEN=VIO
40 Ω < RL < 55 Ω
Revision 1.0
20
0.4*VCC
1800
50
0.5*VCC
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 6. Receiver
Symbol
Parameter
Conditions
VBPidle_low,
VBMidle_low
Idle voltage in low-power modes on
pin BP, BM
Low-power modes
uBias
Bus bias voltage during low-power
modes
IBPidle
Absolute idle output current on pin BP
-40 V < VBP < 40 V
0
IBMidle
Absolute idle output current on pin BM
-40 V < VBM < 40 V
0
IBPleak_ST,
IBMleak_ST
Absolute leakage current, when not
powered
VBP=VBM=5 V, VDD=0 V, VBAT=0 V;
VIO=0 V;
Tamb < 125°C
iBPLeak,
iBMLeak
Absolute leakage current, when not
powered
VBP=VBM=5 V, VDD=0 V, VBAT=0 V;
VIO=0 V;
125°C < Tamb < 150°C
VBUSActiveHigh
Activity detection differential input
voltage high
Normal power modes
-10 V < (VBP, VBM) < 15 V
uBusActiveHigh
Upper receiver threshold for detecting
activity
VBUSActiveLow
Activity detection differential input
voltage low
uBusActiveLow
Lower receiver threshold for detecting
activity
VData1
Data1 detection differential input
voltage
uData1
Receiver threshold for detecting
Data_1
VData0
Data0 detection differential input
voltage
uData0
Receiver threshold for detecting
Data_0
ΔuData
Mismatch of receiver thresholds
tBUS_RxD10
Delay from BUS to RxD negative edge
dBDRx10
tBUS_RxD01
dBDRx01
Max
Units
-0.2
0
+0.2
V
+200
mV
2
7.5
mA
2
7.5
mA
6
25
µA
25
µA
35
150
µA
260
400
mV
425
mV
-150
mV
-150
mV
300
mV
300
mV
-150
mV
-150
mV
10
%
10
%
80
ns
100
ns
80
ns
100
ns
-200
Absolute leakage current, when not
powered
Mismatch between Data0 and Data1
differential input voltage
Typ
40 Ω < RL < 55 Ω
IBPleak_HT,
IBMleak_HT
VDataErr
Min
150
150
Normal power modes
-10 V < (VBP, VBM)< 15 V
-400
-260
-425
Pre-condition: activity already
detected. Normal power mode.
-10 V < (VBP, VBM)< 15 V
150
225
150
Pre-condition: activity already
detected. Normal power mode.
-10 V < (VBP, VBM)< 15 V
-300
225
-300
2 x (VData0- VData1) /
(VData0+VData1)
CRXD=15 pF
2
0
1
34
Receiver delay, negative edge
Delay from BUS to RxD positive edge
CRXD=15 pF
Receiver delay, positive edge
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34
12 - 42
AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 6. Receiver
Symbol
Parameter
Conditions
tbit
Bit time
CRXD=15 pF
tRxD_ASYM
Delay time from BUS to RxD mismatch
2
Receiver delay mismatch
| dBDRx10 – dBDRx01 |
tRXDfall
Fall time RxD voltage
dRxSlope
Fall and rise time 20%-80%, 15pF load
tRXDrise
Rise time RxD voltage
dRxSlope
Fall and rise time 20%-80%, 15pF load
tBUSIdleDetection
Idle detection time
dIdleDetection
Filter-time for idle detection
tBUSActivityDetection
Activity detection time
dActivityDetectio
n
Filter-time for activity detection
tBUSIdleReaction
Idle reaction time
dBDRxai
Idle reaction time
tBUSActivityReaction
Activity reaction time
dBDRxia
Activity reaction time
Typ
Max
60
0
2
2
2
80 % - 20 % of VRXDL;CRXD=15 pF
20 % - 80 % of VRXDL;CRXD=15 pF
2
VBUS: 400mV → 0
2
50
150
50
VBUS: 0 V → 400 mV
100
200
100
VBUS: 400mV → 0
50
160
50
VBUS: 0 V → 400 mV
Units
ns
CRXD=15 pF,
tBUS_RxD10- tBUS_RxD01
dRxAsym
Min
100
210
100
5
ns
5
ns
5
ns
5
ns
5
ns
5
ns
250
ns
250
ns
300
ns
300
ns
300
ns
400
ns
350
ns
450
ns
1. Test condition: (VBP + VBM) / 2 = 2,5V ± 5%
2. For test signal see Figure 13
6.5 Wake-up Detector
The following parameters are applicable to all the branch wake-up detectors.
Table 7. Wake-up Detector
Symbol
Parameter
VBAT_BW
VBAT voltage supply for bus wake-up
Conditions
Min
Typ
6.5
Max
Units
40
V
4
µs
4
µs
In case a VBAT supply voltage input is
implemented, the wake-up detector
shall be operable when uVBAT is equal
to or greater than 7V even if other
supplies are not present.
tBWU0
Data_0 detection time in remote wakeup pattern
dWU0Detect
Acceptance timeout for detection of a
Data_0 phase in wake-up pattern
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-10V<(VBP, VBM)<15V
1
1
Revision 1.0
2
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 7. Wake-up Detector
Symbol
Parameter
Conditions
Min
Typ
Max
Units
tBWUIdle
Idle or Data_1 detection time in remote
wake-up pattern
-10V<(VBP, VBM)<15V
1
2
4
µs
dWUIdleDetect
Acceptance timeout for detection of a
Idle phase in wake-up pattern
4
µs
tBWUDetect
Total remote wake-up detection time
140
µs
dWUTimeout
Acceptance timeout for wake-up
pattern recognition
140
µs
VBWU0
Remote wake-up detector threshold
VLWUTH
Wake-up detection threshold
ILWUL
Low level input current on WAKE pin
ILWUH
High level input current on WAKE pin
tLWUFilter
Local wake filter time
1
-10V<(VBP, VBM)<15V
48
75
48
-10V<(VBP, VBM)<15V
-300
-250
-150
mV
2
2.8
4
V
VBAT=12V; VLWAKE=2V for t<tLWUFilter
-20
-10
-5
µA
VBAT=12V; VLWAKE=4V for t<tLWUFilter
5
10
20
µA
1
20
40
µs
500
µs
dWakePulseFilter Wake pulse filter time (spike rejection)
1
6.6 Supply Voltage Monitor
Table 8. Supply Voltage Monitor
Symbol
Parameter
VBATTHH
Min
Typ
Max
Units
VBAT undervoltage recovery threshold
3.5
4
4.5
V
VBATTHL
VBAT undervoltage detection threshold
2.5
3
3.5
V
uUVBAT
Undervoltage detection threshold
2
5.5
V
VCCTHH
VCC undervoltage recovery threshold
3.5
4
4.5
V
VCCTHL
VCC undervoltage detection threshold
2.5
3
3.5
V
uUVCC
Undervoltage detection threshold
2
VIOTHH
VIO undervoltage recovery threshold
1.25
1.6
2.0
V
VIOTHL
VIO undervoltage detection threshold
0.75
1.1
1.5
V
uUVIO
Undervoltage detection threshold
0.75
tUV_DETECT
Undervoltage detection time
100
dUVBAT, dUVCC,
dUVIO
Undervoltage reaction time
tUV_REC
Undervoltage recovery time
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Conditions
0.7
Revision 1.0
V
V
300
2
700
ms
1000
ms
5
ms
14 - 42
AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.7 Bus Error Detection
The following parameters are applicable to all the branch error detectors.
Table 9. Bus Error Detection
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ITHL
Absolute bus current for
low current detection
NORMAL mode, Transmitter
enabled not production tested
5
20
mA
ITHH
Absolute bus current for
high current detection
NORMAL mode, Transmitter
enabled not production tested
20
40
VSHORT
Differential voltage on BP and BM for
detecting short circuit between bus lines
NORMAL mode, Transmitter
enabled
150
260
tBUS_ERROR
Bus error detection time
Normal mode, Transmitter enabled
mA
400
mV
500
ns
(**) detection only required while
actively transmitting a data frame,
error indication to host latest when
transmission stops.
tBUS_INHIB
Bus short detection inhibit time
Normal mode, Transmitter enabled
0.5
2
4
µs
Min
Typ
Max
Units
6.8 Over Temperature
Table 10. Over Temperature
Symbol
Parameter
Conditions
OTTH
Over temperature threshold high
175
190
205
ºC
OTTL
Over temperature hysteresis low
165
180
195
ºC
6.9 Power Supply Interface
Table 11. Power Supply Interface
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ΔVOINH
High level voltage drop on INH1, INH2
IINH=0.2mA; VBAT=5.5V
0
0.2
0.8
V
⏐IIL⏐
Leakage current
Sleep mode, VINH=0V
-5
0
5
µA
Min
Typ
Max
Units
6.10 Communication Controller Interface
Table 12. Communication Controller Interface
Symbol
Parameter
VTxDIH
Threshold for detecting TxD as on logical high
uVDIG-INHIGH
Threshold for detecting a digital input as on
logical high
VTxDIL
Threshold for detecting TxD as on logical low
0.3 * VIO
uVDIG-INLOW
Threshold for detecting a digital input as on
logical low
0.3 ×
uVDIG
ITxDIH
TxD high level input current
20
50
100
µA
ITxDIL
TxD low level input current
-5
0
5
µA
VTxENIH
Threshold for detecting TxEN as on logical high
0.7 * VIO
V
uVDIG-INHIGH
Threshold for detecting a digital input as on
logical high
0.7 ×
uVDIG
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Conditions
0.48 * VIO 0.7 * VIO
V
0.7 ×
uVDIG
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 12. Communication Controller Interface
Symbol
Parameter
VTxENIL
Threshold for detecting TxEN as on logical low
0.3 * VIO
uVDIG-INLOW
Threshold for detecting a digital input as on
logical low
0.3 ×
uVDIG
ITxENIH
TxEN high level input current
-5
0
5
µA
ITxENIL
TxEN low level input current
-100
-50
-20
µA
VRxDOH
RxD high level output voltage
0.8 * VIO
0.9 * VIO
1.0 * VIO
V
uVDIG-OUTHIGH
Output voltage on a digital output, when in
logical high state
VRxDOL
RxD low level output voltage
uVDIG-OUTLOW
Output voltage on a digital output, when in
logical low state
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Conditions
IRxD=-4mA, VIO=5V
Min
Typ
0
Units
V
0.8 ×
uVDIG
IRxD=4mA, VIO=5V
Max
1.0 ×
uVDIG
0.1 * VIO
0.2 * VIO
V
0.2 ×
uVDIG
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.11 Host Interface
Table 13. Host Interface
Symbol
Parameter
VSTBNIH
Threshold for detecting STBN as on
logical high
uVDIG-IN-HIGH
Threshold for detecting a digital input
as on logical high
VSTBNIL
Threshold for detecting STBN as on
logical low
uVDIG-IN-LOW
Threshold for detecting a digital input
as on logical low
0.3 ×
uVDIG
ISTBNIH
STBN high level input current
20
50
100
µA
ISTBNIL
STBN low level input current
-5
0
5
µA
tSTBN_DEB_LP
STBN de-bouncing time low-power
modes
0.1
1
40
µs
tSTBN_DEB_NLP
STBN de-bouncing time non-lowpower modes
0.1
1
2
µs
VENIH
Threshold for detecting EN as on
logical high
uVDIG-IN-HIGH
Threshold for detecting a digital input
as on logical high
VENIL
Threshold for detecting EN as on
logical low
uVDIG-IN-LOW
Threshold for detecting a digital input
as on logical low
0.3 ×
uVDIG
IENIH
EN high level input current
20
50
100
µA
IENIL
EN low level input current
-5
0
5
µA
tEN_DEB_LP
EN de-bouncing time low-power modes
0.1
1
40
µs
tEN_DEB_NLP
EN de-bouncing time non-low-power
modes
0.1
1
2
µs
VERRNOH
ERRN high level output voltage
uVDIG-OUTHIGH
Output voltage on a digital output,
when in logical high state
VERRNOL
ERRN low level output voltage
uVDIG-OUTLOW
Output voltage on a digital output,
when in logical low state
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Conditions
Min
Typ
Max
0.48 * VIO 0.7 * VIO
Units
V
0.7 ×
uVDIG
0.3 * VIO 0.48 * VIO
V
0.48 * VIO 0.7 * VIO
V
0.7 ×
uVDIG
0.3 * VIO 0.48 * VIO
IERRN =-4mA, VIO=5V
0.8 * VIO
0.8 ×
uVDIG
IERRN =4mA, VIO=5V
0
V
0.9 * VIO 1.0 * VIO
V
1.0 ×
uVDIG
0.1 * VIO 0.2 * VIO
V
0.2 ×
uVDIG
Revision 1.0
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AS8222
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6.12 Bus Guardian Interface
Table 14. Bus Guardian Interface
Symbol
Parameter
Conditions
Min
Typ
Max
VBGEIH
Threshold for detecting BGE as on logical high
uVDIG-INHIGH
Threshold for detecting a digital input as on
logical high
VBGEIL
Threshold for detecting BGE as on logical low
uVDIG-INLOW
Threshold for detecting a digital input as on
logical low
0.3 ×
uVDIG
IBGEIH
BGE high level input current
20
50
100
µA
IBGEIL
BGE low level input current
-5
0
5
µA
VRxENOH
RxEN high level output voltage
uVDIG-OUTHIGH
Output voltage on a digital output, when in
logical high state
VRxENOL
RxEN low level output voltage
uVDIG-OUTLOW
Output voltage on a digital output, when in
logical low state
0.48 * VIO 0.7 * VIO
Units
V
0.7 ×
uVDIG
0.3 * VIO 0.48 * VIO
IRxEN=-4mA, VIO=5V
0.8 * VIO
0.9 * VIO 1.0 * VIO
0.8 ×
uVDIG
IRxEN=4mA, VIO=5V
V
1.0 ×
uVDIG
0.1 * VIO 0.2 * VIO
0
V
V
0.2 ×
uVDIG
6.13 Read Out Interface
Table 15. Read Out Interface
Symbol
Parameter
tRO_PROP_ERRN
Propagation delay falling edge EN to ERRN
tRO_EN_TIMEOUT
Error read out time out
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Conditions
Min
25
Revision 1.0
Typ
Max
Units
2
4.5
µs
50
100
µs
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AS8222
Datasheet - D e t a i l e d D e s c r i p t i o n
7 Detailed Description
The AS8222 is a FlexRay Transceiver operating as an interface between the Communication Controller and the wired bus lines. The AS8222 is
designed to extend the application range for high speed and safety critical time triggered bus systems in an automotive environment. The drivers
are short circuit protected against the positive and negative supply voltage to increase the robustness and reliability of automotive systems. The
AS8222 operates at baudrates up to 10 Mbps.
7.1 Block Description
The AS8222 consists of 9 functional blocks Figure 1.
Table 16. Functional Blocks
Symbol
Parameter
Host Controller Interface (HCI)
Digital interface between the Transceiver and the host controller (HC)
The host interface comprises the read-out handler, which delivers failure and status information via
the ERRN pin to the host controller.
Communication Controller Interface (CCI) Digital interface between the Transceiver and the FlexRay communication controller (CC)
Bus Guarding Interface (BGI)
Power Supply Interface
(PSI)
Internal Logic (IL)
Bus Failure Detector (BFD)
Temperature Protection (TP)
Transmitter
Receiver
Wake-Up Detector (WUD)
Digital interface between the Transceiver and the FlexRay bus guardian (BG) or monitoring
circuitry.
The power supply interface consists of the voltage monitor (VM) with two analog inhibit outputs
switching external voltage supplies.
The digital signals from the functional blocks of the device are fed into the internal logic where the
forwarding of FlexRay messages from analog side to digital interfaces and vice versa is done. The
state machine is embedded in the Internal Logic and the handling of error, wake, and power-on
flags is executed herein.
The bus failure detector is directly connected to the bus pins, in order to detect several external
failure conditions which may occur on the bus.
The temperature protection turns off the output driver when reaching the specified internal
temperature in order to protect the device.
The transmitter provides the differential signaling according the FlexRay standard on the bus pins.
The Receiver captures FlexRay valid signals at the bus pins and provides the received data
streams to the Internal Logic.
The wake-up detector recognizes valid wake-up frames on the bus, recognizes a wake signal on
the local WAKE pin and signals valid wake-up events to the Internal Logic.
7.2 Events
Transitions in order to change between the operation modes are possible only if events are detected. The device supports three types of events:
Events on the host controller interface (STBN, EN),
Detection of undervoltage or supply voltage recovery and
Wake events.
Mode changes are only performed upon detected events.
7.3 Operating Modes
The AS8222 provides the following operating modes:
NORMAL: Non-low-power mode
RECEIVE-ONLY: Non-low-power mode
STANDBY: Low-power mode
GO-TO-SLEEP: Low-power mode
SLEEP: Low-power mode
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Datasheet - D e t a i l e d D e s c r i p t i o n
7.3.1
NORMAL Mode
In this mode the transceiver is able to send and receive data signals on the bus. TxEN and BGE control the state of the transmitter. INH1 and
INH2 outputs are set high. RxD shows the bus data and RxEN the bus state. The error read out mechanism is enabled. In this mode the
transmitter state can be selected as shown in Table 17. In case the over-temperature flag is set the transmitter is disabled. The bus wires are
terminated to VCC/2 via receiver input resistances.
Table 17. Transmitter States
BGE
TxEN
TxD
Transmitter State
Bus state
H
L
H
Enabled
Data_1 (BP is driven high, BM is driven low)
H
L
L
Enabled
Data_0 (BP is driven low, BM is driven high)
X
H
X
Disabled
Idle (BP and BM are not driven)
L
X
X
Disabled
Idle (BP and BM are not driven)
If the differential bus voltage is higher than VBUSActivehigh or lower than VBUSActivelow for a time longer than tBUSActiveDetection, then activity is
detected on the bus (Bus = active), RxEN is switched to logical “low” and RxD is released.
If after the activity detection, the differential bus voltage is higher than VData1, RxD is high.
If after the activity detection, the differential bus voltage is lower than VData0, RxD is low.
If the absolute differential bus voltage is lower than VBUSActivehigh and higher than VBUSActivelow for a time longer than tBUSIdleDetection, then
idle is detected on the bus (Bus = idle), RxEN and RxD are switched to logical “high”.
7.3.2
RECIEVE-ONLY Mode
In this mode the transceiver has the same behavior as in NORMAL mode but the transmitter is disabled.
7.3.3
STANDBY Mode
In this mode the transceiver is not able to send and receive data signals to and from the bus, but the wake up detector is active. The power
consumption is significantly reduced with respect to the non-low-power operation modes. RxD, RxEN signals the negation of the wake-up flag.
INH1 is set to high. If wake-up flag is set then INH2 is high, otherwise it is floating. The error read out mechanism is not enabled. The bus wires
are terminated to GND (bus state: Idle_LP).
7.3.4
GO-TO-SLEEP Mode
In this mode the transceiver has the same behavior as in STANDBY mode but if this mode is selected for a time longer than tSLEEP and the wake
flag is cleared the device enters into the SLEEP mode.
7.3.5
SLEEP Mode
In this mode the transceiver has the same behavior as in standby mode but INH1 and INH2 are floating.
7.4 Non-Operating Modes
The AS8222 provides the following non-operating mode:
POWER-OFF
7.4.1
POWER-OFF Mode
In this mode the transceiver is not able to operate. RxD, RxEN are set to high and ERRN is set to low. INH1 and INH2 are floating. The bus wires
are not connected to GND (bus state: Idle_HZ).
7.5 Undervoltage Events
The device monitors the following three voltage supplies:
VBAT:Battery supply voltage
VIO: Supply voltage for I/O digital level adaptation
VCC: Supply voltage (+5V)
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AS8222
Datasheet - D e t a i l e d D e s c r i p t i o n
7.5.1
Undervoltage / Voltage Recovery VBAT
If VBAT voltage falls below VCCTHL for a time longer than tUV_DETECT then an undervoltage VBAT event is detected. Undervoltage recovery is
detected if VBAT exceeds the voltage threshold VBATTHH for a time longer than tUV_REC.
7.5.2
Undervoltage / Voltage Recovery VIO
If VIO voltage falls below VIOTHL for a time longer than tUV_DETECT then an undervoltage VIO event is detected. Undervoltage recovery is
detected if VIO exceeds the voltage threshold VIOTHH for a time longer than tUV_REC.
7.5.3
Undervoltage / Voltage Recovery VCC
If VCC voltage falls below VCCTHL for a time longer than tUV_DETECT then an undervoltage VCC event is detected. Undervoltage recovery is
detected if VCC exceeds the voltage threshold VCCTHH for a time longer than tUV_REC.
7.6 Power On/Off Events
Starting from POWER-OFF
mode a power-on event occurs in case VBAT undervoltage recovery is detected.
Starting from every operation mode a POWER-OFF event occurs in case VBAT and VCC
undervoltage flags are set.
7.7 Wake-Up Events
A wake-up event is only detected in low-power modes.
7.7.1
Remote Wake-Up Event
A remote wake-up event, only possible in low-power modes, is detected if at least two consecutive wake-up symbols via the FlexRay bus within
tBWUDetect are received. The wake-up symbol is defined as Data0 longer than tBWU0 followed by idle or Data1 longer than tBWUIdle shown in
Figure 3.
Figure 3. Signal for Wake-up Pattern Recognition
Vdiff
Wake symbol
Wake symbol
VBWU0
tBWU0
tBWU0
tBWUidle
tBWUidle
tBWUDetect
7.7.2
Remote Wake-up with Frames
A valid wake-up event can be generated out of the standard FlexRay communication in 5 Mbps and 10 Mbps network configurations, while the
data bits of the FlexRay Frame are set to “low” for a time longer than tBWU0 and set to “high” for time longer than tBWUIdle represent one wake
symbol. A valid wake-up pattern consists of two wake symbols as shown in Figure 3.
In a 10Mbps speed configuration of the network, the payload of the frame is configured as follows:
st
1 wake symbol :
nd
2 wake symbol :
0x00 0x00 0x00 0x00 0x00 0xFF 0xFF 0xFF 0xFF 0xFF
0x00 0x00 0x00 0x00 0x00 0xFF 0xFF 0xFF 0xFF 0xFF
Repetitions of wake symbols might be required if network components are shortening valid Wake symbols (e.g. the time until the device is able
to re-send wake symbols after wake-up).
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7.7.3
Local Wake-Up Event
In all low-power modes, if the voltage on the WAKE pin falls below VLWUTH for longer than tLWUFilter, a local wake-up event is detected. At the
same time the biasing of the pin is switched to pull-down. As well a local wake up event is detected if the voltage on the WAKE pin rises above
VLWUTH for longer than tLWUFilter, then biasing of the pin is switched to pull-up. The pull-up and -down mechanism is activated in low- and nonlow-power modes.
7.8 Over-temperature Events
In NORMAL mode if the temperature exceeds OTTH, the transmitter is deactivated. During this condition the device will remain in NORMAL
mode.
The transmitter is activated again, if the temperature falls below OTTL.
Figure 4. Wake Input Pin Behaviour
Pull-up
WAKE
Pull-down
tLWFilter
Pull-up
tLWFilter
VBAT
RxD / RxEN
VIO
INH
VBAT
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Datasheet - D e t a i l e d D e s c r i p t i o n
7.9 System Description
Figure 5. State Machine Diagram
EN=0 WHILE (STBN=1)
RECEIVE-ONLY
NORMAL
Input:
EN = 1
STBN = 1
Output:
INH1 = 1
INH2 = 1
Input:
EN = 0
STBN = 1
Output:
INH1 = 1
INH2 = 1
EN
=1
AN
ILE
D
(
O STB
(Re EN=1 R
N=
1
VC
se
AN
t_
C
UV D S
WH
_
O
ILE R VC TBN
C)
=1
(E N
)T
=1
HE
AN
N
DS
TB
N=
1)
KE
=
EN
WH
ST
=
BN
GO-TO-SLEEP
Input:
EN = 1
STBN = 0
EN=0 WHILE (STBN=0)
OR
UV_VCC
Output:
INH1 = 1
INH2 = float
0
STBN=0 WHILE (EN=0)
OR
UV_VCC WHILE
EC
_
ND
1A
STANDBY
Input:
EN = 0
STBN = 0
WAKE WHILE (EN=0 AND STBN=0)
OR
UV_VCC WHILE (EN=0 AND STBN=0)
OR
VREC_VCC WHILE (EN=0 AND STBN=0)
OR
WHILE (UV_VCC)
Output:
INH1 = 1
INH2 = float
C)
VREC_VBAT
EN=1 WHILE (STBN=0)
OR
WAKE WHILE (EN=1 AND STBN=0)
OR
VREC_VCC WHILE (EN=1 AND STBN=0)
UV_VBAT WHILE
(UV_VCC)
STBN=0 WHILE (EN=1)
VR
WAKE WHILE (EN=1 AND STBN=0)
OR
VREC_VBAT WHILE (EN=1 AND STBN=0)
OR
VREC_VIO WHILE (EN=1 AND STBN=0)
Timer = tSLEEP
)
=0
BN
)
ST
=0
BN
)
ST
D
=
=0
N
N
BN
(E R 0 A
ST
ILE O EN=
D
H
N
(
A
)
W
CC
ILE OR N=0
KE
_V
WH
(E
WA
UV
T
BA
ILE OR ILE (
_V
H
WH
EC
R
W
V
IO
IO
_V
_V
EC
EC
VR
VR
(U
V_
VC
STBN = 1 WHILE (EN=1)
OR
WAKE WHILE (EN=1 AND STBN=1)
OR
VREC_VBAT WHILE (EN=1 AND STBN=1)
OR
VREC_VIO WHILE (EN=1 AND STBN=1)
WAKE WHILE (EN=1 AND STBN=0)
STBN=1 WHILE (EN=1)
WA
D
AN
=0
EN BN=1
ST
STBN=1 WHILE (EN=0)
OR
WAKE WHILE (EN=0 AND STBN=1)
OR
VREC_VCC WHILE (EN=0 AND STBN=1)
EN=1 WHILE (STBN=1)
EN=0 AND STBN=0
OR
UV_VCC
UV
_V
IO
W
HI
LE
ND
0A
SLEEP
Input:
EN = x
STBN = 0
Output:
INH1 = float
INH2 = float
POWER-OFF
UV_VBAT WHILE (UV_VCC)
OR
UV_Vcc WHILE (UV_VBAT)
STBN=1 WHILE (EN=0)
OR
WAKE WHILE (EN=0 AND STBN=1)
OR
VREC_VBAT WHILE (EN=0 AND STBN=1)
OR
VREC_VIO WHILE (EN=0 AND STBN=1)
UV_VBAT THEN (RESET_WAKE)
OR
UV_VIO THEN (RESET_WAKE)
(EN=0 OR EN=1)
OR
(STBN=1 OR STBN=0) WHILE (UV_V
From any State (except
Power Off)
BAT OR UV_VIO)
OR
UV_VBAT OR UV_VIO OR UV_VCC
OR
VREC_VCC
UV_VBAT:Undervoltage event and/or flag for VBAT supply voltage
VREC_VIO:Voltage recovery event and/or flag for VIO supply voltage
UV_VIO:Undervoltage event and/or flag for VIO supply voltage
VREC_VCC:Voltage recovery event and/or flag for VCC supply
voltage
UV_VCC:Undervoltage event and/or flag for VCC supply voltage
VREC_VBAT:Voltage recovery event and/or flag for VBAT supply
voltage
Reset_Wake:Wake flag is set to low
Reset_UV_VCC:Undervoltage flag VCC is set to low
WAKE:Wake event and/or flag
Notes:
1. This state diagram does not include all transitions, which are shown in Table 19.
2. Prefix of “WHILE” is an event and suffix in brackets checks the flags or in case of EN and STBN the input condition.
- For example: VREC_VBAT WHILE (EN=0 AND STBN=0)
- After the event VBAT supply voltage recovery is detected, the transition is performed if EN and STBN are “low”.
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Datasheet - D e t a i l e d D e s c r i p t i o n
7.10 Fail Silent Behaviour
7.10.1 RxEN / BGE Timeout
In case no edges on RxEN and BGE are detected within tTxEN_timeout, the transmitter will stop transmitting the signals on RxD to the bus pins.
Transmission is only possible in case the BGE (Bus Guardian Enable) pin is set to high and if TxEN (Transmit Enable Not) is set to low (see
Table 17).
7.10.2 State Transitions due to Undervoltage Detection
In case of VBAT or VIO undervoltage is
detected, SLEEP mode will be entered regardless the status of EN and STBN.
In case VCC undervoltage is detected, STANDBY mode will be entered regardless the status of EN and STBN.
VBAT
and VIO undervoltage detection have higher priority than VCC undervoltage detection.
In case undervoltage at VBAT
and VCC is detected, POWER-OFF mode is entered (bus state: Idle_HZ).
7.10.3 State Transitions due to Voltage Recovery Detection
If the voltage recovers the device will enter the mode selected by the EN and STBN pins, in case no undervoltage is present at the other
supply pins.
Starting from the POWER-OFF, the device enters the state selected by the host input pins (EN, STBN) only if VBAT or VCC recovers
(VBAT
≥ VBATTHH or VCC ≥ VCCTHH) while VIO is available (undervoltage flag of VIO flag not set). If the VIO undervoltage flag is set, the
STANDBY mode will be entered. In both cases the Power-On flag is set.
If VBAT ≤ VBATTHL and VCC ≤ VCCTHL
the device will be in POWER-OFF state, thus the bus wires are not terminated (bus state: Idle_HZ).
7.11 Mode Transitions
Starting from every operation mode the device enters POWER-OFF in case a power-off event occurs regardless the VIO undervoltage flag,
the wake-up flag and the host input pins (EN, STBN).
Starting from the POWER-OFF the device enters STANDBY only in case a power-on event occurs.
Starting from every operation mode the device enters SLEEP in case VBAT or VIO undervoltage flag is set regardless the VCC undervoltage
flag, the wake-up flag and the host input pins (EN, STBN).
Starting from every operation mode except SLEEP the device enters STANDBY in case
VCC undervoltage flag is set and VBAT and VIO
undervoltage flags are not set, regardless the wake-up flag indication and the host input pins state.
Starting from a low-power mode the device enters the operation mode indicated by the host input pins if a wake-up event occurs.
In case all the undervoltage flags are reset the operation mode is selected by the wake-up flag and the host pins according to
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Datasheet - D e t a i l e d D e s c r i p t i o n
Table 18. Pin Signalling in Operating Modes
Inputs
STBN
H
Outputs
Operation Mode
EN
H
NORMAL
RxD
RxEN
L
Bus = Data_0
L
Bus = Active
H
Bus = Idle or Data_1
H
Bus = Idle
L
Bus = Data_0
L
Bus = Active
H
Bus = Idle or Data_1
H
Bus = Idle
INH1
INH2
H
H
H
H
H
L
RECEIVE-ONLY
L
H
GO-TO-SLEEP
NOT [Wake-up flag]
NOT [Wake-up flag]
H
Floating
L
L
STANDBY
NOT [Wake-up flag]
NOT [Wake-up flag]
H
Floating
L
X
SLEEP
NOT [Wake-up flag]
NOT [Wake-up flag]
Floating
Floating
1
3
2
2
1. If GO-TO-SLEEP is selected for more than tSLEEP then the device will enter SLEEP only if the wake-up flag is not set otherwise it will
remain in GO-TO-SLEEP.
2. If wake-up flag is set INH2=H otherwise INH2=floating.
3. Starting from SLEEP, if the wake-up flag is set, the device enters STANDBY regardless of the host pins state and undervoltage flags.
Starting from SLEEP, if the wake up flag is not set, the only operating mode that can be entered through host pins are the non-low-power
modes.
Note: “H” = Digital level high; “L” = Digital level low; “X” = Don’t care; “Floating” = the analog output is not driven.
Table 19. Mode Transitions
Initial Mode
NORMAL
RECEICVE-ONLY
Supply Undervoltage Flag / Event
VIO
VBAT
VCC
L
L
L
L
L
L
Wake Flag
Host Event
STBN
EN
X
H
H→L
L
X
H→L
H→L
L
L→H
X
X
X
L
L
L
X
H→L
H
L→ H
L
X
X
X
X
X
L→ H
L
X
X
X
L
L
L
X
H
L→ H
L
L
L
X
H→ L
L
L
L
L→ H
X
X
X
L→ H
L
X
X
X
X
X
L→ H
L
X
X
X
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Next Mode
RECEIVE-ONLY
STANDBY
GO-TO-SLEEP
SLEEP
NORMAL
STANDBY
SLEEP
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Datasheet - D e t a i l e d D e s c r i p t i o n
Table 19. Mode Transitions
Initial Mode
STANDBY
GO-TO-SLEEP
SLEEP
POWER-OFF
Any
Supply Undervoltage Flag / Event
VIO
VBAT
VCC
L
L
H→L
L
L
L
Wake Flag
Host Event
Next Mode
STBN
EN
X
H
H
L
X
L→ H
L→ H
L
(b) H → L
(a) → H
H
H
L
L
L
X
L→H
L
L
L
H→L
X
H
L
L
L
(b) H → L
(a) → H
H
L
L
L
L
X
L
L→H
L
L
H→L
X
L
H
L
L
H→L
(a) → H
L
H
LH
L
X
X
X
X
X
L→ H
L
X
X
X
L
L
L
X
LH
H
L
L
L→ H
X
X
X
L
L
L
X
L
H→ L
L
L
L
L
L
L→H
L
X
X
X
X
X
L→H
L
X
X
X
L
L
L
L
LH
H
H→L
L
L
L
H
H
L
H→L
L
L
H
H
L
L
H→L
L
H
H
L
L
L
L
L→H
L
H→L
L
L
L
H
L
L
H→L
L
L
H
L
L
L
H→L
L
H
L
(b) → L
(b) → L
(b) → L
(a) → H
X
X
STANDBY
X
H→ L
X
X
X
X
STANDBY
X
H
L→ H
X
X
X
X
L→ H
H
X
X
X
1
NORMAL
RECEIVE-ONLY
GO-TO-SLEEP
SLEEP
NORMAL
STANDBY
1
H
SLEEP
NORMAL
RECEIVE-ONLY
POWER-OFF
1. If GO-TO-SLEEP is selected for more than tSLEEP
Notes:
1. (a) indicates the event that causes the transition.
2. (b) indicates the consequence of the event (a).
3. “H” = Digital level high; “L” = Digital level low; “X” = Don’t care.
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Datasheet - D e t a i l e d D e s c r i p t i o n
7.11.1 Error Pin Signalling
In Table 20 the signaling at the Error Not (ERRN) pin is shown.
Table 20. Error Not (ERRN) Signalling
Supply undervoltage Flag at Remote Wake
VBAT, VIO, VCC
Flag
Host Command
Local Wake
Flag
STBN
EN
ERRN
L
X
X
H
H
NOT [Error flag]
L
H
X
H
L
L
L
H
X
H
↑
(positive edge)
L → NOT [Error flag]
L
L
X
H
L
H
L
L
X
H
↑
(positive edge)
H → NOT [Error flag]
L
L
L
L
X
H
L
L
↑
(positive edge)
L
X
H→L
L
↑
(positive edge)
L
L
X
H→L
L
H
↑
(positive edge)
L
X
L
L
↑
(positive edge)
H
L
X
L
H
X
X
X
X
L
7.12 Loss of Ground
In case the ground of the device is disconnected and the host pins are open the bus lines are switched to Idle_HZ.
7.13 ERROR Flags Description
All error flags are reset after error readout is completed (see Section 7.15) or in POWER-OFF mode.
7.13.1 Undervoltage Detected VBAT Flag
This flag is set if an undervoltage event at VBAT is detected. This flag signals if undervoltage was detected but will not initiate a mode change.
7.13.2 Undervoltage Detected VIO Flag
This flag is set if an undervoltage event at VIO is detected. This flag signals if undervoltage was detected but will not initiate a mode change.
7.13.3 Undervoltage Detected VCC Flag
This flag is set if an undervoltage event at VCC is detected. This flag signals if undervoltage was detected but will not initiate a mode change.
7.13.4 Bus Error
The bus error flag is set, after a time tBUS_INHIB while the driver is enabled and activated until the end of the frame if
2 consecutive rising edges at the TxD pin without any rising edge at the RxD pin are detected, or
2 consecutive falling edges at the TxD pin without any falling edge at the RxD pin are detected.
The flag is only set in NORMAL mode.
7.13.5 Bus Open Line
BP open line can only be set in NORMAL mode if the driver is enabled. The flag is set if the absolute current through BP or BM is lower than ITHL
for a time longer than tBUS_ERROR. The flag is meaningful only if no short circuit flag is set.
7.13.6 BP Short Circuit to VCC
BP short circuit to VCC can only be set in NORMAL mode if the driver is enabled. The flag is set if the absolute current flowing through BP is
higher than ITHH during transmission of Data0 for a time longer than tBUS_ERROR.
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7.13.7 BP Short Circuit to GND
BP short circuit to GND can only be set in NORMAL mode if the driver is enabled. The flag is set if the absolute current flowing through BP is
higher than ITHH during transmission of Data1 for a time longer than tBUS_ERROR.
7.13.8 BM Short Circuit to VCC
BM short circuit to VCC can only be set in NORMAL mode if the driver is enabled. The flag is set if the absolute current flowing through BM is
higher than ITHH during transmission of Data1 for a time longer than tBUS_ERROR.
7.13.9 BM Short Circuit to GND
BM short circuit to GND can only be set in NORMAL mode if the driver is enabled. The flag is set if the absolute current flowing through BM is
higher than ITHH during transmission of Data0 for a time longer than tBUS_ERROR.
7.13.10 Short Circuit between BP and BM
The flag is set if, after a time tBUS_INHIB while the driver is enabled and active until the end of the current FlexRay frame and the absolute
differential bus voltage is lower than VSHORT.
7.13.11 Over-temperature
This flag can only be set and reset in the non-low-power modes. The flag is set if the junction temperature exceeds OTTH and is reset if the
junction temperature falls below OTTL.
7.13.12 TxEN_BGE Timeout
This flag can only be set in NORMAL mode if the driver is enabled (TxEN is low and BGE is high) for a time longer than tTxEN_max. It is reset after
every status change at TxEN or BGE or if the device exits NORMAL mode. In case the flag is set the driver is disabled.
7.13.13 Error Flag
This flag is set if at least one error flag (as listed below) is set, except undervoltage VBAT, VIO and VCC (refer to sections 7.13.1, 7.13.2 &
7.13.3). The error flag is reset if none of the flags are set.
Table 21. Functional Blocks
Section No.
Flag Name
7.13.4
Bus Error
7.13.5
Bus Open Line
7.13.6
BP Short Circuit to VCC
7.13.7
BP Short Circuit to GND
7.13.8
BM Short Circuit to VCC
7.13.9
BM Short Circuit to GND
7.13.10
Short Circuit between BP and BM
7.13.11
Over-temperature
7.13.12
TxEN_BGE Timeout
Note: The error flag is signalled on ERRN pin according to Table 20.
7.14 STATUS Flags Description
7.14.1 Local and Remote Wake Flag
Local and remote flags and function are described in Section 7.7 Wake-Up Events.
7.14.2 Power on Flag
The power on flag is set leaving the POWER-OFF state and it is reset entering a low-power mode after a non-low-power mode.
7.14.3 BGE Status
The BGE status flag is set if BGE is high and is reset if BGE is low. The state of the BGE is latched at the beginning of the readout cycle.
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Datasheet - D e t a i l e d D e s c r i p t i o n
7.15 Error and Status Flags Read Out
The error and status flag readout mechanism is a serial transmission which is controlled with the EN pin and the information is submitted on the
ERRN pin. The mechanism is only activated in NORMAL and RECEIVE-ONLY mode. In all other operation modes the error and status
information cannot be accessed.
Figure 6. Timing of the Readout Mechanism
EN
70% VIO
30% VIO
ERRN
70% VIO
ERRN
30% VIO
Bit 1
Bit 0
ERROR FLAG
Bit 2
Bit 3
ERRN
tRO_PROP_ERRN
t < tRO_EN_TIMEOUT
t > tRO_EN__TIMEOUT
The error and status flags are read out by applying a clock signal to pin EN. A falling edge on pin EN starts the readout loading the content of the
error/status flag into the shift register and signaling the stream of flags on the ERRN pin. On the second falling edge the first flag (Bit 0) will be
shifted out. The ERRN data is valid after tRO_PROP_ERRN. If EN pin keeps on toggling after last flag (Bit 15) the next flag shifted out is Bit 0. The
complete list of bits is shown in Table 22. If no transition is detected on pin EN for longer than tRO_EN_TIMEOUT the device enters the operation
mode indicated by the host pins.
Table 22. Bit Order for the Readout Sequence
BIT
Flag Description
Bit 0
Undervoltage VBAT detected
Bit 1
Undervoltage VIO detected
Bit 2
Undervoltage VCC detected
Bit 3
Bus error
Bit 4
BGE status
Bit 5
BP short circuit to VCC
Bit 6
BP short circuit to GND
Bit 7
Bus open line
Bit 8
BM short circuit to VCC
Bit 9
BM short circuit to GND
Bit 10
Short circuit between BP and BM
Bit 11
Over temperature
Bit 12
TxEN_BGE timeout
Bit 13
Local wake flag
Bit 14
Remote wake flag
Bit 15
Power on flag
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Datasheet - B u s D r i v e r
8 Bus Driver
8.1 AS8222 Bus States
Activity:Differential bus signals as shown in chapter 10.3 Transmitter and 10.4 Receiver applies.
Idle:The bus wires are terminated to VCC / 2 through the receiver input resistances.
Idle_LP:The bus wires are terminated to GND through the receiver input resistances.
Idle_HZ:The bus wires are not terminated. The input resistances are about 1 M Ω.
8.2 Transceiver Timing
Figure 7. Bus Driver Timing Diagram
tTxD_BUS01
tTxD_BUS10
TxD
0.5 * VIO
BGE
0.5 * VIO
TxEN
0.5 * VIO
tTxEN_BUS_Idle_Active
tBGE_BUS_Idle_Active
tTxEN_BUS_Active_Idle
tBGE_BUS_Active_Idle
300 mV
80 %
tBUS_Idle_Active
VBUS
30 mV
-300 mV
30 mV
-300 mV
20 %
-300 mV
tBUS_Active_Idle
RxD
RxEN
0.5 * VIO
0.5 * VIO
tBUS_RxD01
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tBUSIdleReaction tBUSActivityReaction
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tBUS10
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Datasheet - B u s D r i v e r
8.3 Transmitter
In NORMAL mode, while BGE is high, the transmitter drives full voltage levels on the bus after tTXEN_BUS_Idle_Active from TxEN falling edge and
drives idle after tTXEN_BUS_Active_Idle from TxEN rising edge.
The Transmitter is not permanently enabled. If after the time tTxEN_timeout no edge is detected at TxEN, the transmission will be stopped to avoid
unwanted collisions on the FlexRay bus.
Figure 8. Transmitter Characteristics (TxEN → BUS, while BGE is high)
VTxEN
70% * VIO
30% * VIO
< tTxEN_timeout
< tTxEN_timeout
VBUS
tTxEN_BUS_Active_Idle
tTxEN_BUS_Idle_Active
tBUS_Active_Idle
tBUS_Idle_Active
VBUS_DIFF_D1
300 mV
+ VBUS_DIFF_Idle
- VBUS_DIFF_Idle
- 300 mV
VBUS_DIFF_D0
In NORMAL mode, while TxEN is high, the transmitter drives full voltage levels on the bus after tTXEN_BUS_Idle_Active from BGE rising edge and
drives idle after tTXEN_BUS_Active_Idle from BGE falling edge.
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Datasheet - B u s D r i v e r
Figure 9. Transmitter Characteristics (BGE → BUS, while TxEN is low)
VBGE
50% * VIO
VBUS
tBGE_BUS_Active_Idle
tBGE_BUS_Idle_Active
tBUS_Active_Idle
tBUS_Idle_Active
VBUS_DIFF_D1
300 mV
+ VBUS_DIFF_Idle
- VBUS_DIFF_Idle
- 300 mV
VBUS_DIFF_D0
The transmitter generates the FlexRay differential bus voltage according to input signal on TxD as shown in Figure 10.
Figure 10. Transmitter Characteristics TxD → BUS
VTxD
70% * VIO
30% * VIO
Data1: x * tBIT
Data0: x * tBIT
VBUS
tTxD_BUS01
tTxD_BUS10
tBUS01
tBUS01
VBUS_DIFF_D1
80% * VBUS_DIFF
+ VBUS_DIFF_Idle
- VBUS_DIFF_Idle
20% * VBUS_DIFF
VBUS_DIFF_D0
Data1: x * tBIT
Data0: x * tBIT
In NORMAL and RECEIVE-ONLY mode the transmitter drives Idle on the bus in case no data are transmitted. In STANDBY, GO-TO-SLEEP and
SLEEP mode the transmitter drives Idle_LP (idle low-power) on the bus pins. In POWER_OFF mode the bus pins shows Idle_HZ (idle high
impedance).
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Datasheet - B u s D r i v e r
8.4 Receiver
The receiver generates from the FlexRay differential bus voltage a digital signal on the RxD and RxEN pins. RxD shows the data (Data0 and
Data1) and RxEN shows the bus idle and activity status received on the bus pins. The receiver is only active in NORMAL and RECEIVE_ONLY
mode.
Figure 11. Timing Characteristics (BUS → RxD and RxEN)
VBUS
VBUS_ActiveHigh
VData1
+ VBUS_DIFF_Idle
- VBUS_DIFF_Idle
VBUS_ActiveLow
VData0
Data0: x * tBIT
VRxEN
Data1: x * tBIT
tBUSActivityReaction
tBUSIdleReaction
70% * VIO
30% * VIO
tBUS_RxD10
VRxD
tBUS_RxD01
tRxD_RISE
tRxD_FALL
70% * VIO
30% * VIO
8.4.1
Bus activity and idle detection (only in NORMAL and RECEIVE ONLY mode)
If the absolute differential bus voltage is higher than VBUSActiveLow and less than VBUSActiveHigh for a time longer than tBUSIdleDetection, bus
Idle is detected, RxEN and RxD are switched to logical high after with a time tBUSIdleReaction.
If the absolute differential bus voltage is higher than VBUSActiveHigh or lower than VBUSActiveLow
for a time loner than tBUSActivitiyDetection, bus
Activity is detected, RxEN is switched to logical low and RxD is following the detected bus data states as indicated below with a time
tBUSActivityReaction.
Table 23. Logic Table for Receiver Bus Signal Detection
Receiver Operation Mode
Bus State / Signals
RxEN
RxD
Idle
H
H
Data0
L
L
Data1
L
H
Normal power modes (NORMAL and RECEIVE-ONLY mode)
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AS8222
Datasheet - B u s D r i v e r
8.4.2
Bus Data Detection (Only in NORMAL and RECEIVE ONLY Mode)
If, after the activity detection the differential bus voltage is higher than VData1, RxD will be high after a time tBUS_RxD01.
If, after the activity detection the differential bus voltage is lower than VData0, RxD will be low after a
time tBUS_RxD10.
Figure 12. Receiver Characteristics (BUS → RxD and RxEN)
VRxD
VBUS
VBUS
VRxEN
VBUS
VBUS
VBUS_ActiveLow
VData0
Data0
Activity
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VBUS_ActiveHigh
VData1
Idle
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Activity
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Datasheet - B u s D r i v e r
8.4.3
Receiver Test Signal
In Figure 13 the receiver test signal according the FlexRay Electrical Physical Layer specification is shown.
Figure 13. Receiver Test Signal
VBUS
22 ns
22 ns
400 mV
300 mV
-300 mV
-400 mV
tBIT
tBUS_RxD01
RxD
VBUS
tBUS_RxD10
22 ns
22 ns
400 mV
300 mV
-300 mV
-400 mV
tBIT
RxD
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tBUS_RxD10
tBUS_RxD01
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Datasheet - Te s t c i r c u i t s
9 Test circuits
9.1 ISO7637-2 Test Pulses - Class D
Figure 14. Test Circuitry for ISO 7637 - 2 Test Pulses
VBAT
Pulse
Generator
33k
1nF
10µF
VBAT
GND
+ 100nF
GND
WAKE
BP
3k3
Pulse
Generator
1nF
Custom
Circuitry
FlexRay: 330 pF
AS8222
Global
Pins
FlexRay Enhanced
Standard Transceiver
Pulse
Generator
BM
FlexRay: 330 pF
GND
GND
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AS8222
Datasheet - Te s t c i r c u i t s
Figure 15. AS8222 Application Schematic
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9.2 Application Circuit
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Datasheet - A p p e n d i x
10 Appendix
10.1 FlexRay Functional Classes
The AS8222 FlexRay Enhances Standard Transceiver has the following Bus Driver function classes according the FlexRay Electrical Physical
Layer Specification V2.1 Rev B implemented:
Functional Class: Chapter 8.13.1 “Bus Driver voltage regulator control”
Functional Class: Chapter 8.13.2 “Bus Driver - Bus Guardian interface”
Functional Class: Chapter 8.13.4 “Bus Driver logic level adaptation”
10.2 FlexRay Parameter Comparison
FlexRay Electrical Physical Layer Specification V2.1 Rev. B parameters are shown in color blue in tables (2 to 15).
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AS8222
Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
11 Package Drawings and Markings
The product is available in 20-Lead Shrink Small Outline Package SSOP-20.
Figure 16. Drawings and Dimensions
Symbol
A
A1
A2
b
c
D
E
E1
e
L
L1
L2
R
Θ
N
AS8222 @
YYWWMZZ
Min
1.73
0.05
1.68
0.22
0.09
6.90
7.40
5.00
0.55
0.09
0°
Nom
1.86
0.13
1.73
0.30
0.17
7.20
7.80
5.30
0.65 BSC
0.75
125 REF
0.25 BSC
4°
20
Max
1.99
0.21
1.78
0.38
0.25
7.50
8.20
5.60
0.95
8°
Notes:
1. Dimensions & tolerancing conform to ASME Y14.5M-1994.
2. All dimensions are in millimeters. Angles are in degrees.
3. N is the total number of terminals.
Marking: YYWWMZZ.
YY
WW
M
ZZ
@
Year
Manufacturing Week
Assembly plant identifier
Assembly traceability code
Sublot identifier
Note: Package marking is not applied to engineering samples!
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AS8222
Datasheet - O r d e r i n g I n f o r m a t i o n
12 Ordering Information
Table 24. Ordering Information
Ordering Code
Marking
Description
Delivery Form
Package
AS8222-HSSP
AS8222
AS8222 Enhanced FlexRay Standard
Transceiver
Tape & Reel in Dry Pack
(1 reel = 2000 units)
SSOP-20
AS8222-HSSM
AS8222
AS8222 Enhanced FlexRay Standard
Transceiver
Tape & Reel in Dry Pack
(1 reel = 500 units)
SSOP-20
For bare die deliveries please contact ams customer service.
Note: All products are RoHS compliant and ams green.
Buy our products or get free samples online at www.ams.com/ICdirect
Technical Support is available at www.ams.com/Technical-Support
For further information and requests, email us at sales@ams.com
(or) find your local distributor at www.ams.com/distributor
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AS8222
Datasheet - R e v i s i o n H i s t o r y
Revision History
Revision
Date
Owner
Description
1.0
11 Dec, 2012
hgl
Initial version
Note: Typos may not be explicitly mentioned under revision history.
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AS8222
Datasheet - C o p y r i g h t s
Copyrights
Copyright © 1997-2012, ams AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights
reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the
copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ams AG makes no
warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described
devices from patent infringement. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior
to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in normal
commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability
applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing
by ams AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard
production flow, such as test flow or test location.
The information furnished here by ams AG is believed to be correct and accurate. However, ams AG shall not be liable to recipient or any third
party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or
indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the
technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other
services.
Contact Information
Headquarters
ams AG
Tobelbaderstrasse 30
A-8141 Unterpremstaetten, Austria
Tel
Fax
: +43 (0) 3136 500 0
: +43 (0) 3136 525 01
For Sales Offices, Distributors and Representatives, please visit:
http://www.ams.com/contact
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