ATMEL ATA6623

Features
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Supply Voltage up to 40V
Operating Voltage VS = 5V to 27V
Typically 10 µA Supply Current During Sleep Mode
Typically 57 µA Supply Current in Silent Mode
Linear Low-drop Voltage Regulator:
– Normal, Fail-safe, and Silent Mode
– ATA6623: VCC = 3.3V ±2%
– ATA6625: VCC = 5.0V ±2%
– Sleep Mode: VCC is Switched Off
VCC Undervoltage Detection with Reset Open Drain Output NRES (4 ms Reset Time)
Voltage Regulator is Short-circuit and Over-temperature Protected
LIN Physical Layer According to LIN 2.0, 2.1 and SAEJ2602-2
Wake-up Capability via LIN Bus (90 µs Dominant)
TXD Time-out Timer
Bus Pin is Overtemperature and Short-circuit Protected versus GND and Battery
Advanced EMC and ESD Performance
ESD HBM 8 kV at Pins LIN and VS Following STM5.1
Interference and Damage Protection According to ISO/CD7637
Package: SO8
1. Description
LIN Bus
Transceiver
with Integrated
Voltage
Regulator
ATA6623
ATA6625
ATA6623/ATA6625 is a fully integrated LIN transceiver, designed according to the LIN
specification 2.0 and 2.1, with a low-drop voltage regulator (3.3V/5V/50 mA). The
combination of voltage regulator and bus transceiver makes it possible to develop
simple, but powerful, slave nodes in LIN Bus systems. ATA6623/ATA6625 is
designed to handle the low-speed data communication in vehicles (for example, in
convenience electronics). Improved slope control at the LIN driver ensures secure
data communication up to 20 kBaud with an RC oscillator for the protocol handling.
The bus output is designed to withstand high voltage. Sleep Mode (voltage regulator
switched off) and Silent Mode (communication off; VCC voltage on) guarantee minimized current consumption.
4957G–AUTO–09/09
Figure 1-1.
Block Diagram
ATA6623/25
1
VS
4
LIN
8
VCC
7
NRES
VCC
RXD
Normal
Mode
Receiver
5
+
RF-filter
VCC
Wake-up bus timer
TXD
EN
Slew rate control
TXD
Time-out
timer
6
2
Control
unit
GND
Short circuit and
overtemperature
protection
3
Normal/Silent/
Fail-safe Mode
3.3V/50 mA/±2%
5V/50 mA/±2%
Sleep
mode
VCC
switched
off
Undervoltage reset
2. Pin Configuration
Figure 2-1.
Pinning SO8
VS
EN
GND
LIN
Table 2-1.
2
1
2
3
4
8
7
6
5
VCC
NRES
TXD
RXD
Pin Description
Pin
Symbol
Function
1
VS
Battery supply
2
EN
Enables Normal Mode if the input is high
3
GND
4
LIN
LIN bus line input/output
5
RXD
Receive data output
6
TXD
Transmit data input
7
NRES
Output undervoltage reset, low at reset
8
VCC
Output voltage regulator 3.3V/5V/50 mA
Ground, heat sink
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
3. Functional Description
3.1
Physical Layer Compatibility
Since the LIN physical layer is independent from higher LIN layers (e.g., LIN protocol layer), all
nodes with a LIN physical layer according to revision 2.x can be mixed with LIN physical layer
nodes, which are according to older versions (i.e., LIN 1.0, LIN 1.1, LIN 1.2, LIN 1.3) without any
restrictions.
3.2
Supply Pin (VS)
LIN operating voltage is VS = 5V to 27V. An undervoltage detection is implemented to disable
transmission if VS falls below 5V, in order to avoid false bus messages. After switching on VS,
the IC starts with the Fail-safe Mode and the voltage regulator is switched on (i.e.,
3.3V/5V/50 mA).
The supply current in Sleep Mode is typically 10 µA and 57 µA in Silent Mode.
3.3
Ground Pin (GND)
The IC is neutral on the LIN pin in the event of GND disconnection. It is able to handle a ground
shift up to 11.5% of VS.
3.4
Voltage Regulator Output Pin (VCC)
The internal 3.3V/5V voltage regulator is capable of driving loads with up to 50 mA, supplying
the microcontroller and other ICs on the PCB and is protected against overload by means of current limitation and overtemperature shut-down. Furthermore, the output voltage is monitored
and will cause a reset signal at the NRES output pin if it drops below a defined threshold Vthun.
3.5
Undervoltage Reset Output (NRES)
If the VCC voltage falls below the undervoltage detection threshold of Vthun, NRES switches to
low after tres_f (Figure 6-1 on page 11). Even if VCC = 0V the NRES stays low, because it is
internally driven from the VS voltage. If VS voltage ramps down, NRES stays low until VS < 1.5V
and then becomes highly resistant.
The implemented undervoltage delay keeps NRES low for tReset = 4 ms after VCC reaches its
nominal value.
3.6
Bus Pin (LIN)
A low-side driver with internal current limitation and thermal shutdown as well as an internal
pull-up resistor according to LIN specification 2.x is implemented. The voltage range is from
–27V to +40V. This pin exhibits no reverse current from the LIN bus to VS, even in the event of a
GND shift or VBatt disconnection. The LIN receiver thresholds are compatible with the LIN protocol specification.
The fall time (from recessive to dominant) and the rise time (from dominant to recessive) are
slope controlled.
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4957G–AUTO–09/09
3.7
Input Pin (TXD)
In Normal Mode the TXD pin is the microcontroller interface to control the state of the LIN output.
TXD must be pulled to ground in order to drive the LIN bus low. If TXD is high or unconnected
(internal pull-up resistor), the LIN output transistor is turned off and the bus is in the recessive
state.
3.8
Dominant Time-out Function (TXD)
The TXD input has an internal pull-up resistor. An internal timer prevents the bus line from being
driven permanently in the dominant state. If TXD is forced to low longer than tDOM > 6 ms, the
LIN bus driver is switched to the recessive state.
To reactivate the LIN bus driver, switch TXD to high (> 10 µs).
3.9
Output Pin (RXD)
The pin reports the state of the LIN-bus to the microcontroller. LIN high (recessive state) is
reported by a high level at RXD; LIN low (dominant state) is reported by a low level at RXD. The
output has an internal pull-up resistor with typically 5 kΩ to VCC. The AC characteristics are measured with an external load capacitor of 20 pF.
The output is short-circuit protected. In Unpowered Mode (that is, VS = 0V), RXD is switched off.
3.10
Enable Input Pin (EN)
The Enable Input pin controls the operation mode of the device. If EN is high, the circuit is in
Normal Mode, with transmission paths from TXD to LIN and from LIN to RXD both active. The
VCC voltage regulator operates with 3.3V/5V/50 mA output capability.
If EN is switched to low while TXD is still high, the device is forced to Silent Mode. No data transmission is then possible, and the current consumption is reduced to IVS typ. 57 µA. The VCC
regulator has its full functionality.
If EN is switched to low while TXD is low, the device is forced to Sleep Mode. No data transmission is possible, and the voltage regulator is switched off.
4
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
4. Mode of Operation
Figure 4-1.
Mode of Operation
a: VS > 5V
Unpowered Mode
VBatt = 0V
b
b: VS < 4V
c: Bus wake-up event
d: NRES switches to low
a
Fail-safe Mode
b
b
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
d
EN = 1
c+d
EN = 1
c
Go to silent command
b
EN = 0
Silent Mode
TXD = 1
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
Local wake-up event
Normal Mode
EN = 1
VCC: 3.3V/5V/50 mA
with undervoltage
monitoring
Go to sleep command
EN = 0
Communication: ON
Sleep Mode
TXD = 0
VCC: switched off
Communication: OFF
Table 4-1.
Mode of Operation
Mode of
Operation
Transceiver
VCC
RXD
LIN
Fail safe
OFF
3.3V/5V
High,
Except after wake-up
Recessive
Normal
ON
3.3V/5V
LIN depending
TXD depending
Silent
OFF
3.3V/5V
High
Recessive
Sleep
OFF
0V
0V
Recessive
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4957G–AUTO–09/09
4.1
Normal Mode
This is the normal transmitting and receiving Mode of the LIN Interface, in accordance with LIN
specification 2.x. The VCC voltage regulator operates with a 3.3V/5V output voltage, with a low
tolerance of ±2% and a maximum output current of 50 mA.
If an undervoltage condition occurs, NRES is switched to low and the IC changes its state to
Fail-safe Mode.
4.2
Silent Mode
A falling edge at EN while TXD is high switches the IC into Silent Mode. The TXD Signal has to
be logic high during the Mode Select window (Figure 4-2 on page 7). The transmission path is
disabled in Silent Mode. The overall supply current from V Batt is a combination of the
IVSsi = 57 µA plus the VCC regulator output current IVCC.
The 3.3V/5V regulator with 2% tolerance can source up to 50 mA. In Silent Mode the internal
slave termination between pin LIN and pin VS is disabled, and only a weak pull-up current (typically 10 µA) between pin LIN and pin VS is present. The Silent Mode can be activated
independently from the current level on pin LIN.
If an undervoltage condition occurs, NRES is switched to low and the IC changes its state to
Fail-safe Mode.
A voltage less than the LIN Pre-wake detection V LINL at pin LIN activates the internal LIN
receiver and switches on the internal slave termination between the LIN pin and the VS pin.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (tbus) and the following rising edge at pin LIN (see Figure 4-3 on page 7) results in a
remote wake-up request.
The device switches from Silent Mode to Fail-safe Mode, and the remote wake-up request is
indicated by a low level at pin RXD to interrupt the microcontroller (Figure 4-3 on page 7). EN
high can be used to switch directly to Normal Mode.
6
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
Figure 4-2.
Switch to Silent Mode
Normal Mode
Silent Mode
EN
Mode select window
TXD
td = 3.2 µs
NRES
VCC
Delay time silent mode
td_silent = maximum 20 µs
LIN
LIN switches directly to recessive mode
Figure 4-3.
LIN Wake-up Waveform Diagram from Silent Mode
Bus wake-up filtering time
tbus
Fail-safe mode
Normal mode
LIN bus
RXD
VCC
High
Low
Silent mode 3.3V/5V/50 mA
Fail-safe mode 3.3V/5V/50 mA
Normal mode
EN High
EN
NRES
Undervoltage detection active
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4957G–AUTO–09/09
4.3
Sleep Mode
A falling edge at EN while TXD is low switches the IC into Sleep Mode. The TXD Signal has to
be logic low during the Mode Select window (Figure 4-4 on page 8). To avoid influencing the
LIN-pin during the switch to sleep mode, it is possible to switch the EN up to 3.2 µs earlier to
LOW than the TXD. Even if the two falling edges at TXD and EN occur at the same time, the LIN
line will remain uninfluenced.
In Sleep Mode the transmission path is disabled. The supply current IVSsleep from VBatt is typically
10 µA. The VCC regulator is switched off, NRES and RXD are low. The internal slave termination
between pin LIN and pin VS is disabled, only a weak pull-up current (typically 10 µA) between
pin LIN and pin VS is present. Sleep Mode can be activated independently from the current level
on pin LIN.
A voltage less than the LIN Pre-wake detection V LINL at pin LIN activates the internal LIN
receiver and switches on the internal slave termination between the LIN pin and the VS pin.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (tbus) and a following rising edge at pin LIN results in a remote wake-up request. The
device switches from Sleep Mode to Fail-safe Mode.
The VCC regulator is activated, and the remote wake-up request is indicated by a low level at the
RXD pin to interrupt the microcontroller (Figure 4-5 on page 9).
EN high can be used to switch directly from Sleep to Fail-safe Mode. If EN is still high after VCC
ramp up and undervoltage reset time, the IC switches to Normal Mode.
Figure 4-4.
Switch to Sleep Mode
Normal Mode
Sleep Mode
EN
Mode select window
TXD
td = 3.2 µs
NRES
VCC
Delay time sleep mode
td_sleep = maximum 20 µs
LIN
LIN switches directly to recessive mode
8
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
Figure 4-5.
LIN Wake-up Diagram from Sleep Mode
Bus wake-up filtering time
tbus
Fail-safe Mode
Low or floating
Low
Normal Mode
LIN bus
RXD
VCC
voltage
regulator
On state
Off state
Regulator wake-up time
EN High
EN
Reset
time
NRES
Low or floating
Microcontroller
start-up time delay
4.4
Fail-safe Mode
At system power-up the device automatically switches to Fail-safe Mode. The voltage regulator
is switched on (VCC = 3.3V/5V/50 mA), (see Figure 6-1 on page 11). The NRES output switches
to low for tres = 4 ms and gives a reset to the microcontroller. LIN communication is switched off.
The IC stays in this mode until EN is switched to high, and changes then to the Normal Mode. A
power down of VBatt (VS < 4V) during Silent- or Sleep Mode switches the IC into the Fail-safe
Mode after power up. A logic low at NRES switches the IC into Fail-safe Mode directly.
4.5
Unpowered Mode
If you connect battery voltage to the application circuit, the voltage at the VS pin increases
according to the block capacitor (see Figure 6-1 on page 11). After VS is higher than the VS
undervoltage threshold VSth, the IC mode changes from Unpowered Mode to Fail-safe Mode.
The VCC output voltage reaches its nominal value after tVCC. This time, tVCC, depends on the
VCC capacitor and the load.
NRES is low for the reset time delay tReset; no mode change is possible during this time.
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4957G–AUTO–09/09
5. Fail-safe Features
• During a short-circuit at LIN to VBattery, the output limits the output current to IBUS_lim. Due to
the power dissipation, the chip temperature exceeds TLINoff and the LIN output is switched off.
The chip cools down and after a hysteresis of Thys, switches the output on again. RXD stays
on high because LIN is high. During LIN overtemperature switch-off, the VCC regulator is
working independently.
• During a short-circuit from LIN to GND the IC can be switched into Sleep or Silent Mode. If
the short-circuit disappears, the IC starts with a remote wake-up.
• The reverse current is very low < 2 µA at pin LIN during loss of VBatt. This is optimal behavior
for bus systems where some slave nodes are supplied from battery or ignition.
• During a short circuit at VCC, the output limits the output current to IVCClim. Because of
undervoltage, NRES switches to low and sends a reset to the microcontroller. The IC
switches into Fail-safe Mode. If the chip temperature exceeds the value TVCCoff, the VCC
output switches off. The chip cools down and after a hysteresis of Thys, switches the output on
again. Because of Fail-safe Mode, the VCC voltage will switch on again although EN is
switched off from the microcontroller. The microcontroller can then start with normal
operation.
• Pin EN provides a pull-down resistor to force the transceiver into Recessive Mode if EN is
disconnected.
• Pin RXD is set floating if VBatt is disconnected.
• Pin TXD provides a pull-up resistor to force the transceiver into Recessive Mode if TXD is
disconnected.
• If TXD is short-circuited to GND, it is possible to switch to Sleep Mode via ENABLE after
tdom > 20 ms.
10
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
6. Voltage Regulator
Figure 6-1.
VCC Voltage Regulator: Ramp Up and Undervoltage
VS
12V
5.5V/3.8V
VCC
5V/3.3V
Vthun
tVCC
tReset
tres_f
NRES
5V/3.3V
The voltage regulator needs an external capacitor for compensation and to smooth the disturbances from the microcontroller. It is recommended to use an electrolythic capacitor with
C > 1.8 µF and a ceramic capacitor with C = 100 nF. The values of these capacitors can be varied by the customer, depending on the application.
With this special SO8 package (fused lead frame to pin 3) an Rthja of 80 K/W is achieved.
Therefore, it is recommended to connect pin 3 with a wide GND plate on the printed board to get
a good heat sink.
The main power dissipation of the IC is created from the V CC output current IVCC , which is
needed for the application.
Figure 6-2 shows the safe operating area of the ATA6623/ATA6625.
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4957G–AUTO–09/09
Figure 6-2.
Power Dissipation: Save Operating Area versus VCC Output Current and Supply
Voltage VS at Different Ambient Temperatures Due to Rthja = 80 K/W
60.00
Tamb = 85°C
50.00
Tamb = 95°C
IVCC (mA)
40.00
Tamb = 105°C
30.00
20.00
10.00
0.00
5
6
7
8
9
10
11
12
13 14
15
16
17 18
19
VS (V)
To program the microcontroller it may be necessary to supply the VCC output via an external
power supply while the VS Pin of the system basis chip is disconnected. This issue does not
occur with the system basis chip.
12
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
7. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Symbol
Min.
Supply voltage VS
VS
–0.3
Pulse time ≤ 500 ms
Ta = 25°C
Output current IVCC ≤ 50 mA
Pulse time ≤ 2 min
Ta = 25°C
Output current IVCC ≤ 50 mA
Max.
Unit
+40
V
VS
+40
V
VS
27
V
Logic pins (RxD, TxD, EN, NRES)
Output current NRES
Typ.
–0.3
INRES
+5.5
V
+2
mA
LIN
- DC voltage
–27
+40
V
VCC
- DC voltage
–0.3
+5.5
V
ESD according to IBEE LIN EMC
Test specification 1.0 following IEC 61000-4-2
- Pin VS, LIN to GND
±6
KV
ESD HBM following STM5.1
with 1.5 kΩ/100 pF
- Pin VS, LIN to GND
±8
KV
±3
KV
CDM ESD STM 5.3.1
±750
V
Machine Model ESD
AEC-Q100-RevF(003)
±200
V
HBM ESD
ANSI/ESD-STM5.1
JESD22-A114
AEC-Q100 (002)
Junction temperature
Tj
–40
+150
°C
Storage temperature
Ts
–55
+150
°C
Symbol
Min.
Max.
Unit
145
K/W
8. Thermal Characteristics
Parameters
Thermal resistance junction to ambient
(free air)
Special heat sink at GND (pin 3) on PCB
Typ.
Rthja
80
Rthja
K/W
Thermal shutdown of VCC regulator
TVCCoff
150
160
170
°C
Thermal shutdown of LIN output
TLINoff
150
160
170
°C
Thermal shutdown hysteresis
Thys
10
°C
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4957G–AUTO–09/09
9. Electrical Characteristics
5V < VS < 27V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
1
1.1
1.2
1.3
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
VS
VS
5
13.5
27
V
A
Sleep Mode
VLIN > VS – 0.5V
VS < 14V (Tj = 25°C)
VS
IVSsleep
3
10
14
µA
A
Sleep Mode
VLIN > VS – 0.5V
VS < 14V (Tj = 125°C)
VS
IVSsleep
5
11
16
µA
A
Bus recessive
VS < 14V (Tj = 25°C)
Without load at VCC
VS
IVSsi
47
57
67
µA
A
Bus recessive
VS < 14V (Tj = 125°C)
Without load at VCC
VS
IVSsi
56
66
76
µA
A
VS Pin
Nominal DC voltage
range
Supply current in Sleep
Mode
Supply current in Silent
Mode
1.4
Bus recessive
Supply current in Normal
VS < 14V
Mode
Without load at VCC
VS
IVSrec
0.3
0.8
mA
A
1.5
Bus dominant
Supply current in Normal
VS < 14V
Mode
VCC load current 50 mA
VS
IVSdom
50
53
mA
A
1.6
Supply current in
Fail-safe Mode
VS
IVSspeed
200
500
µA
A
1.7
VS undervoltage
threshold
VS
VSth
4.0
5
V
A
1.8
VS undervoltage
threshold hysteresis
VS
VSth_hys
V
A
RXD
IRXD
8
mA
A
0.4
V
A
7
kΩ
A
2
Bus recessive
VS < 14V
Without load at VCC
0.2
RXD Output Pin
Normal Mode
VLIN = 0V
VRXD = 0.4V
2.1
Low level output sink
current
2.2
Low level output voltage IRXD = 1 mA
RXD
VRXDL
Internal resistor to VCC
RXD
RRXD
3
2.3
3
4.5
1.3
2.5
5
TXD Input Pin
3.1
Low level voltage input
TXD
VTXDL
–0.3
+0.8
V
A
3.2
High level voltage input
TXD
VTXDH
2
VCC +
0.3V
V
A
3.3
Pull-up resistor
VTXD = 0V
TXD
RTXD
125
400
kΩ
A
3.4
High level leakage
current
VTXD = VCC
TXD
ITXD
–3
+3
µA
A
250
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
14
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
9. Electrical Characteristics (Continued)
5V < VS < 27V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
4
EN Input Pin
4.1
Low level voltage input
4.2
High level voltage input
4.3
Pull-down resistor
4.4
Low level input current
5
Test Conditions
Pin
Symbol
Min.
EN
VENL
Typ.
Max.
Unit
Type*
–0.3
+0.8
V
A
VCC +
0.3V
V
A
200
kΩ
A
+3
µA
A
EN
VENH
2
VEN = VCC
EN
REN
50
VEN = 0V
EN
IEN
–3
NRES
VNRESL
VNRESL
0.2
0.14
V
V
A
A
0.2
V
A
6
ms
A
125
NRES Open Drain Output Pin
5.1
VS ≥ 5.5V
Low level output voltage INRES = 1 mA
INRES = 250 µA
5.2
Low level output low
10 kΩ to VCC
VCC = 0V
NRES
VNRESLL
5.3
Undervoltage reset time
VS ≥ 5.5V
CNRES = 20 pF
NRES
tReset
2
5.4
Reset debounce time for VS ≥ 5.5V
CNRES = 20 pF
falling edge
NRES
tres_f
1.5
10
µs
A
6
4
VCC Voltage Regulator ATA6623
6.1
Output voltage VCC
4V < VS < 18V
(0 mA to 50 mA)
VCC
VCCnor
3.234
3.366
V
A
6.2
Output voltage VCC at
low VS
3V < VS < 4V
VCC
VCClow
VS –
VDrop
3.366
V
A
6.3
Regulator drop voltage
VS > 3V, IVCC = –15 mA
VCC
VD1
200
mV
A
700
mV
A
1
%
A
2
%
A
dB
C
6.4
Regulator drop voltage
VS > 3V, IVCC = –50 mA
VCC
VD2
6.5
Line regulation
4V < VS < 18V
VCC
VCCline
6.6
Load regulation
5 mA < IVCC < 50 mA
VCC
VCCload
6.7
Power supply ripple
rejection
10 Hz to 100 kHz
CVCC = 10 µF
VS = 14V, IVCC = –15 mA
VCC
6.8
Output current limitation VS > 4V
VCC
IVCClim
–240
–160
mA
A
6.9
Load capacity
0.2Ω < ESR < 5Ω at 100 kHz
VCC
Cload
1.8
10
µF
D
6.10
VCC undervoltage
threshold
Referred to VCC
VS > 4V
VCC
VthunN
2.8
V
A
6.11
Hysteresis of
undervoltage threshold
Referred to VCC
VS > 4V
VCC
Vhysthun
150
mV
A
6.12
Ramp up time VS > 4V
to VCC = 3.3V
CVCC = 2.2 µF
Iload = –5 mA at VCC
VCC
tVCC
100
250
µs
A
7
500
0.5
50
3.2
VCC Voltage Regulator ATA6625
7.1
Output voltage VCC
5.5V < VS < 18V
(0 mA to 50 mA)
VCC
VCCnor
4.9
5.1
V
A
7.2
Output voltage VCC at
low VS
4V < VS < 5.5V
VCC
VCClow
VS – VD
5.1
V
A
7.3
Regulator drop voltage
VS > 4V, IVCC = –20 mA
VCC
VD1
250
mV
A
Regulator drop voltage
VS > 4V, IVCC = –50 mA
VCC
VD2
600
mV
A
7.4
400
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
15
4957G–AUTO–09/09
9. Electrical Characteristics (Continued)
5V < VS < 27V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
Test Conditions
Pin
Symbol
7.5
Regulator drop voltage
VS > 3.3V, IVCC = –15 mA
VCC
VD3
7.6
Line regulation
5.5V < VS < 18V
VCC
VCCline
7.7
Load regulation
5 mA < IVCC < 50 mA
VCC
VCCload
7.8
Power supply ripple
rejection
10 Hz to 100 kHz
CVCC = 10 µF
VS = 14V, IVCC = –15 mA
VCC
7.9
Output current limitation VS > 5.5V
VCC
IVCClim
–240
7.10
Load capacity
0.2Ω < ESR < 5Ω at 100 kHz
VCC
Cload
1.8
7.11
VCC undervoltage
threshold
Referred to VCC
VS > 5.5V
VCC
VthunN
4.2
7.12
Hysteresis of
undervoltage threshold
Referred to VCC
VS > 5.5V
VCC
Vhysthun
250
7.13
Ramp up time VS > 5.5V CVCC = 2.2 µF
to VCC = 5V
Iload = –5 mA at VCC
VCC
tVCC
130
8
Min.
Typ.
Max.
Unit
Type*
200
mV
A
1
%
A
2
%
A
dB
C
–160
mA
A
10
µF
D
V
A
mV
A
µs
A
0.5
50
4.8
300
LIN Bus Driver: Bus Load Conditions:
Load 1 (Small): 1 nF, 1 kΩ, Load 2 (Large): 10 nF, 500Ω, Internal Pull-up RRXD = 5 kΩ, CRXD = 20 pF,
Load 3 (Medium): 6.8 nF, 660Ω, Characterized on Samples
10.6 and 10.7 Specifies the Timing Parameters for Proper Operation at 20 kBit/s and 10.8 and 10.9 at 10.4 kBit/s
8.1
Driver recessive output
voltage
8.2
Driver dominant voltage VVS = 7V, Rload = 500Ω
8.3
Driver dominant voltage VVS = 18V, Rload = 500Ω
LIN
V_HiSUP
V
A
8.4
Driver dominant voltage VVS = 7V, Rload = 1000Ω
LIN
V_LoSUP_1k
0.6
V
A
8.5
Driver dominant voltage VVS = 18V, Rload = 1000Ω
LIN
V_HiSUP_1k
0.8
V
A
8.6
Pull–up resistor to VS
LIN
RLIN
20
60
kΩ
A
8.7
Voltage drop at the serial In pull-up path with Rslave
ISerDiode = 10 mA
diodes
LIN
VSerDiode
0.4
1.0
V
D
8.8
LIN current limitation
VBUS = VBatt_max
LIN
IBUS_lim
40
120
200
mA
A
8.9
Input leakage current at
the receiver including
pull-up resistor as
specified
Input Leakage current
Driver off
VBUS = 0V
VBatt = 12V
LIN
IBUS_PAS_dom
–1
–0.35
mA
A
8.10
Leakage current LIN
recessive
Driver off
8V < VBatt < 18V
8V < VBUS < 18V
VBUS ≥ VBatt
LIN
IBUS_PAS_rec
8.11
Leakage current when
control unit disconnected
GNDDevice = VS
from ground. Loss of
VBatt = 12V
local ground must not
0V < VBUS < 18V
affect communication in
the residual network
LIN
IBUS_NO_gnd
Load1/Load2
The serial diode is
mandatory
LIN
VBUSrec
LIN
V_LoSUP
0.9 × VS
VS
V
A
1.2
V
A
2
–10
30
10
20
µA
A
+0.5
+10
µA
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
16
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
9. Electrical Characteristics (Continued)
5V < VS < 27V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
Test Conditions
8.12
Leakage current at
disconnected battery.
Node has to sustain the VBatt disconnected
current that can flow
VSUP_Device = GND
under this condition. Bus 0V < VBUS < 18V
must remain operational
under this condition.
Pin
Symbol
Min.
LIN
IBUS_NO_bat
LIN
VBUS_CNT
0.475 ×
VS
Typ.
Max.
Unit
Type*
0.1
2
µA
A
0.5 ×
VS
0.525 ×
VS
V
A
9
LIN Bus Receiver
9.1
Center of receiver
threshold
9.2
Receiver dominant state VEN = 5V
LIN
VBUSdom
–27
0.4 × VS
V
A
9.3
Receiver recessive state VEN = 5V
LIN
VBUSrec
0.6 × VS
40
V
A
9.4
Receiver input
hysteresis
LIN
VBUShys
0.028 ×
VS
0.175 ×
VS
V
A
9.5
Pre-wake detection LIN
High level input voltage
LIN
VLINH
VS – 2V
VS +
0.3V
V
A
9.6
Pre-wake detection LIN
Low level input voltage
Activates the LIN receiver
LIN
VLINL
–27
VS – 3.3V
V
A
10
Internal Timers
150
µs
A
20
µs
A
VBUS_CNT =
(Vth_dom + Vth_rec)/2
Vhys = Vth_rec – Vth_dom
0.1 x VS
10.1
Dominant time for
wake–up via LIN bus
VLIN = 0V
LIN
tbus
30
10.2
Time delay for mode
change from Pre-normal
V = 5V
into Normal Mode via pin EN
EN
EN
tnorm
5
10.3
Time delay for mode
change from Normal
V = 0V
Mode to Sleep Mode via EN
pin EN
EN
tsleep
2
7
15
µs
A
10.4
TXD dominant time out
time
TXD
tdom
6
13
20
ms
A
10.5
Time delay for mode
change from Silent Mode VEN = 5V
into Normal Mode via EN
EN
ts_n
5
15
40
µs
A
Duty cycle 1
THRec(max) = 0.744 × VS
THDom(max) = 0.581 × VS
VS = 7.0V to 18V
tBit = 50 µs
D1 = tbus_rec(min)/(2 × tBit)
LIN
D1
0.396
Duty cycle 2
THRec(min) = 0.422 × VS
THDom(min) = 0.284 × VS
VS = 7.6V to 18V
tBit = 50 µs
D2 = tbus_rec(max)/(2 × tBit)
LIN
D2
10.6
10.7
VTXD = 0V
90
A
0.581
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
17
4957G–AUTO–09/09
9. Electrical Characteristics (Continued)
5V < VS < 27V, –40°C < Tj < 150°C; unless otherwise specified all values refer to GND pins.
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Duty cycle 3
THRec(max) = 0.778 × VS
THDom(max) = 0.616 × VS
VS = 7.0V to 18V
tBit = 96 µs
D3 = tbus_rec(min)/(2 × tBit)
LIN
D3
0.417
10.9
Duty cycle 4
THRec(min) = 0.389 × VS
THDom(min) = 0.251 × VS
VS = 7.6V to 18V
tBit = 96 µs
D4 = tbus_rec(max)/(2 × tBit)
LIN
D4
10.10
Slope time falling and
rising edge at LIN
VS = 7.0V to 18V
LIN
tSLOPE_fall
tSLOPE_rise
10.8
11
Typ.
Max.
Unit
A
0.590
3.5
Type*
A
22.5
µs
A
6
µs
A
+2
µs
A
Receiver Electrical AC Parameters of the LIN Physical Layer
LIN Receiver, RXD Load Conditions: CRXD = 20 pF
VS = 7.0V to 18V
trx_pd = max(trx_pdr , trx_pdf)
11.1
Propagation delay of
receiver Figure 9-1
11.2
Symmetry of receiver
VS = 7.0V to 18V
propagation delay rising
trx_sym = trx_pdr – trx_pdf
edge minus falling edge
RXD
trx_pd
RXD
trx_sym
–2
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
18
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
Figure 9-1.
Definition of Bus Timing Characteristics
tBit
tBit
tBit
TXD
(Input to transmitting node)
tBus_dom(max)
tBus_rec(min)
Thresholds of
receiving node1
THRec(max)
VS
(Transceiver supply
of transmitting node)
THDom(max)
LIN Bus Signal
Thresholds of
receiving node2
THRec(min)
THDom(min)
tBus_dom(min)
tBus_rec(max)
RXD
(Output of receiving node1)
trx_pdf(1)
trx_pdr(1)
RXD
(Output of receiving node2)
trx_pdr(2)
trx_pdf(2)
19
4957G–AUTO–09/09
Figure 9-2.
Application Circuit
VCC
1
ATA6623/25
VBAT
VS
VCC
RXD 5
Master
node
pull-up
Normal
Mode
Receiver
+
100 nF
22 µF
1 kΩ
+
4
LIN-BUS
RF filter
LIN
220 pF
VCC
Microcontroller
Wake-up bus timer
TXD
EN
6
TXD
Time-out
timer
Slew rate control
2
Control
unit
GND
3
Short circuit and
overtemperature
protection
Sleep
mode
VCC
switched
off
Normal/Silent/
Fail-safe Mode
3.3V/50 mA/±2%
5V/50 mA/±2%
8
VCC
7
NRES
10 kΩ
Undervoltage reset
100 nF
10 µF
GND
20
ATA6623/ATA6625
4957G–AUTO–09/09
ATA6623/ATA6625
10. Ordering Information
Extended Type Number
Package
ATA6623-TAPY
Remarks
SO8
3.3V LIN system basis chip, Pb-free, 1k, taped and reeled
ATA6625-TAPY
SO8
5V LIN system basis chip, Pb-free, 1k, taped and reeled
ATA6623-TAQY
SO8
3.3V LIN system basis chip, Pb-free, 4k, taped and reeled
ATA6625-TAQY
SO8
5V LIN system basis chip, Pb-free, 4k, taped and reeled
11. Package Information
Package: SO 8
Dimensions in mm
5±0.2
4.9±0.1
0.1+0.15
1.4
0.2
3.7±0.1
0.4
1.27
3.8±0.1
6±0.2
3.81
8
5
technical drawings
according to DIN
specifications
1
4
Drawing-No.: 6.541-5031.01-4
Issue: 1; 15.08.06
21
4957G–AUTO–09/09
12. Revision History
Please note that the following page numbers referred to in this section refer to the specific revision
mentioned, not to this document.
Revision No.
History
4957G-AUTO-09/09
•
•
•
•
•
•
4957F-AUTO-02/08
• “Pre-normal Mode” in “Fail-safe Mode” changed
• Section 7 “Absolute Maximum Ratings” on page 13 changed
• Section 8 “Electrical Characteristics” numbers 10.5 to 10.10 on pages 17
to 18 changed
4957E-AUTO-10/07
• Section 9 “Ordering Information” on page 20 changed
•
•
•
•
4957D-AUTO-07/07
•
•
•
•
Figures changed: 1-1, 4-2, 4-3, 4-4, 4-5, 6-2, 9-2
Sections changed: 3.1, 3.6, 3.8, 3.9, 3.10, 4.1, 4.2, 4.3, 5
Description Text changed
Table 4-1 changed
Abs. Max. Ratings table changed
El. Characteristics table changed
Features changed
Block diagram changed
Application diagram changed
Text changed under the headings:
3.2, 3.3, 3.4, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 5.5, 5.6, 6
Figure 4-2, 4-3, 4-4, 4-5, 8-2: changed
Figure title 6-1: text changed
Abs. Max. Ratings: row “Output current NRES” added
El. Char. table: values changed in the following rows:
1.3, 5.1, 5.3, 5.4, 6.9, 6.12, 7.9, 11.1
•
•
•
•
•
•
•
•
•
4957C-AUTO-02/07
22
Features on page 1 changed
Table 2-1 “Pin Description” on page 2 changed
Section 3-1 “Physical Layer Compatibility” on page 3 added
Section 3-2 “Supply Pin (VS) on page 3 changed
Section 3-3 “Ground Pin (GND) on page 3 changed
Section 3-8 “Dominant Time-out Function (TXD)” on page 4 changed
Section 4-1 “Normal Mode” on page 5 changed
Section 4-2 “Silent Mode” on page 5 changed
Figure 4-3 “LIN Wake-up Waveform Diagram from Silent Mode” on page
6 changed
• Section 4.3 “Sleep Mode” on page 7 changed
• Section 4-5 “Unpowered Mode” on page 7 changed
• Figure 4-4 “Switch to Sleep Mode” on page 8 changed
• Figure 4-6 “VCC Voltage Regulator: Ramp up and Undervoltage” on page
9 changed
• Section 5 “Fail-safe Features on page 9 changed
• Section 6 “Voltage Regulator” on page 10 changed
• Section 7 “Absolute Maximum Ratings” on page 11 changed
• Section 8 “Electrical Characteristics” on pages 12 to 16 changed
• Section 9 “Ordering Information” on page 18 changed
ATA6623/ATA6625
4957G–AUTO–09/09
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4957G–AUTO–09/09