AMIS 42675 D

AMIS-42675
High Speed Low Power CAN
Transceiver for Long Wire
Networks
Description
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PIN ASSIGNMENT
TxD
1
8
STB
GND
2
7
CANH
VCC
3
6
CANL
RxD
4
5
VSPLIT
AMIS−
42675
The AMIS−42675 CAN transceiver is the interface between a
controller area network (CAN) protocol controller and the physical
bus. It may be used in both 12 V and 24 V systems. The transceiver
provides differential transmit capability to the bus and differential
receive capability to the CAN controller.
Due to the wide common−mode voltage range of the receiver inputs,
the AMIS−42675 is able to reach outstanding levels of
electro−magnetic susceptibility (EMS). Similarly, extremely low
electromagnetic emission (EME) is achieved by the excellent
matching of the output signals.
The AMIS−42675 is the industrial version of the AMIS−42665 and
primarily for applications where long network lengths are mandatory.
Examples are elevators, in−building networks, process control and
trains. To cope with the long bus delay the communication speed
needs to be low. AMIS−42675 allows low transmit data rates down 10
Kbit/s or lower.
The AMIS−42675 is the low power member of the CAN high−speed
transceiver family and offers the following additional features:
PC20041204.3
(Top View)
Features
•
•
•
•
•
•
•
•
•
•
Ideal Passive Behavior When Supply Voltage is Removed
Wake−up Over Bus
Extremely Low Current Standby Mode
Compatible With the ISO 11898 standard (ISO
11898−2, ISO 11898−5 and SAE J2284)
Wide Range of Bus Communication Speed (0 up to
1 Mbit/s)
Ideally Suited for 12 V and 24 V Industrial and
Automotive Applications
Allows Low Transmit Data Rate in Networks
Exceeding 1 km
Extremely Low Current Standby Mode with Wake−up
via the Bus
Low Electromagnetic Emission (EME):
Common−Mode Choke is No Longer Required
Differential Receiver with Wide Common−Mode
Range ($35 V) for High EMS
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
• Voltage Source via VSPLIT Pin for Stabilizing the
Recessive Bus Level (Further EMC Improvement)
• No Disturbance of the Bus Lines with an Unpowered
Node
• Thermal Protection
• Bus Pins Protected Against Transients
• Power Down Mode in Which the Transmitter is
•
•
•
•
Disabled
Bus and VSPLIT Pins Short Circuit Proof to Supply
Voltage and Ground
Logic Level Inputs Compatible with 3.3 V Devices
At Least 110 Nodes can be Connected to the Same Bus
These are Pb−Free Devices*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2008
December, 2008 − Rev. 2
1
Publication Order Number:
AMIS−42675/D
AMIS−42675
Table 1. TECHNICAL CHARACTERISTICS
Max
Max
Unit
VCC
Symbol
Power Supply Voltage
Parameter
Condition
4.75
5.25
V
VSTB
DC Voltage at Pin STB
−0.3
VCC
V
VTxD
DC Voltage at Pin TxD
−0.3
VCC
V
VRxD
DC Voltage at Pin RxD
−0.3
VCC
V
VCANH
DC Voltage at Pin CANH
0 < VCC < 5.25 V; No Time Limit
−35
+35
V
VCANL
DC Voltage at Pin CANL
0 < VCC < 5.25 V; No Time Limit
−35
+35
V
VSPLIT
DC Voltage at Pin VSPLIT
0 < VCC < 5.25 V; No Time Limit
−35
+35
V
VO(dif)(bus_dom)
Differential Bus Output Voltage in
Dominant State
42.5 W < RLT < 60 W
1.5
3
V
CM−range
Input Common−Mode Range for
Comparator
Guaranteed Differential Receiver Threshold
and Leakage Current
−35
+35
V
VCM−peak
Common−Mode Peak
Note 1
−500
500
mV
Cload
Load Capacitance on IC Outputs
15
pF
tpd(rec−dom)
Propagation Delay TxD to RxD
See Figure 4
70
230
ns
tpd(dom−rec)
Propagation Delay TxD to RxD
See Figure 4
100
245
ns
VCM−step
Common−Mode Step
−150
150
mV
Tjunc
Junction Temperature
−40
150
°C
Note 1
1. The parameters VCM−peak and VCM−step guarantee low EME.
VCC
VCC
TxD
AMIS−42675
1
STB
RxD
GND
4
POR
Thermal
shutdown
VCC
8
3
Mode &
wake−up
control
CANH
5
VSPLIT
VCC
V SPLIT
6
Driver
control
Wake −up
Filter
7
COMP
2
COMP
PC20071005.2
Figure 1. Block Diagram
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2
CANL
AMIS−42675
Table 2. PIN DESCRIPTION
Pin
Name
1
TxD
Transmit Data Input; Low Input → Dominant Driver; Internal Pullup Current
Description
2
GND
Ground
3
VCC
Supply Voltage
4
RxD
Receive Data Output; Dominant Transmitter → Low Output
5
VSPLIT
Common−Mode Stabilization Output
6
CANL
Low−Level CAN Bus Line (Low in Dominant Mode)
7
CANH
High−Level CAN Bus Line (High in Dominant Mode)
8
STB
Standby Mode Control Input
Table 3. ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Conditions
Min
Max
Unit
VCC
Supply Voltage
−0.3
+7
V
VCANH
DC Voltage at Pin CANH
0 < VCC < 5.25 V; No Time
Limit
−50
+50
V
VCANL
DC Voltage at Pin CANL
0 < VCC < 5.25 V; No Time
Limit
−50
+50
V
VSPLIT
DC Voltage at Pin VSPLIT
0 < VCC < 5.25 V; No Time
Limit
−50
+50
V
VTxD
DC Voltage at Pin TxD
−0.3
VCC + 0.3
V
VRxD
DC Voltage at Pin RxD
−0.3
VCC + 0.3
V
VSTB
DC Voltage at Pin STB
−0.3
VCC + 0.3
V
Vtran(CANH)
Transient Voltage at Pin CANH
Note 2
−300
+300
V
Vtran(CANL)
Transient Voltage at Pin CANL
Note 2
−300
+300
V
Vtran(VSPLIT)
Transient Voltage at Pin VSPLIT
Note 2
−300
+300
V
Vesd(
Electrostatic Discharge Voltage at all
Pins
Note 4
Note 5
−5
−750
+5
+750
kV
V
Latch−up
Static Latch−up at All Pins
Note 4
120
mA
Tstg
Storage Temperature
−55
+150
°C
TA
Ambient Temperature
−40
+125
°C
TJ
Maximum Junction Temperature
−40
+170
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
2. Applied transient waveforms in accordance with ISO 7637 part 3, test pulses 1, 2, 3a, and 3b (see Figure 3).
3. Standardized human body model electrostatic discharge (ESD) pulses in accordance to MIL883 method 3015.7.
4. Static latch−up immunity: Static latch−up protection level when tested according to EIA/JESD78.
5. Standardized charged device model ESD pulses when tested according to EOS/ESD DS5.3−1993.
Table 4. THERMAL CHARACTERISTICS
Symbol
Parameter
Conditions
Value
Unit
Rth(vj−a)
Thermal Resistance from Junction−to−Ambient in SOIC−8 Package
In Free Air
145
k/W
Rth(vj−s)
Thermal Resistance from Junction−to−Substrate of Bare Die
In Free Air
45
k/W
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AMIS−42675
APPLICATION SCHEMATIC
VBAT
IN
5V−reg
OUT
VCC
VCC
STB
CAN
controller
RxD
TxD
3
7
8
4
AMIS−
42675
1
2
PC20071005.3
GND
5
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4
VSPLIT
60 W
6
GND
Figure 2. Application Diagram
CANH
CANL
60 W
47 nF
CAN
BUS
AMIS−42675
FUNCTIONAL DESCRIPTION
Operating Modes
AMIS−42675 provides two modes of operation as
illustrated in Table 5. These modes are selectable through
Pin STB.
Table 5. OPERATING MODES
Pin RXD
Mode
Pin STB
Low
High
Normal
Low
Bus Dominant
Bus Recessive
Standby
High
Wake−up Request Detected
No wake−up Request Detected
Normal Mode
Overtemperature Detection
In the normal mode, the transceiver is able to
communicate via the bus lines. The signals are transmitted
and received to the CAN controller via the Pins TxD and
RxD. The slopes on the bus lines outputs are optimized to
give extremely low EME.
A thermal protection circuit protects the IC from damage
by switching off the transmitter if the junction temperature
exceeds a value of approximately 160°C. Because the
transmitter dissipates most of the power, the power
dissipation and temperature of the IC is reduced. All other
IC functions continue to operate. The transmitter off−state
resets when Pin TxD goes high. The thermal protection
circuit is particularly needed when a bus line short circuits.
Standby Mode
In stand−by mode both the transmitter and receiver are
disabled and a very low−power differential receiver
monitors the bus lines for CAN bus activity. The bus lines
are terminated to ground and supply current is reduced to a
minimum, typically 10 mA. When a wake−up request is
detected by the low−power differential receiver, the signal
is first filtered and then verified as a valid wake signal after
a time period of tBUS, the RxD Pin is driven low by the
transceiver to inform the controller of the wake−up request.
High Communication Speed Range
The transceiver is primarily intended for industrial
applications. It allows very low baud rates needed for long
bus length applications. But also high speed communication
is possible up to 1 Mbit/s.
Fail Safe Features
A current−limiting circuit protects the transmitter output
stage from damage caused by accidental short circuit to
either positive or negative supply voltage, although power
dissipation increases during this fault condition.
The Pins CANH and CANL are protected from
automotive electrical transients (according to ISO 7637; see
Figure 3). Pins TxD and STB are pulled high internally
should the input become disconnected. Pins TxD, STB and
RxD will be floating, preventing reverse supply should the
VCC supply be removed.
Split Circuit
The VSPLIT Pin is operational only in normal mode. In
standby mode this pin is floating. The VSPLIT is connected
as shown in Figure 2 and its purpose is to provide a stabilized
DC voltage of 0.5 x VCC to the bus avoiding possible steps
in the common−mode signal therefore reducing EME. These
unwanted steps could be caused by an un−powered node on
the network with excessive leakage current from the bus that
shifts the recessive voltage from its nominal 0.5 x VCC
voltage.
Wake−up
Once a valid wake−up (dominant state longer than tBUS)
has been received during the standby mode, the RxD Pin is
driven low.
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AMIS−42675
ELECTRICAL CHARACTERISTICS
Definitions
All voltages are referenced to GND (pin 2). Positive currents flow into the IC. Sinking current means the current is flowing
into the pin; sourcing current means the current is flowing out of the pin.
Table 6. DC CHARACTERISTICS VCC = 4.75 V to 5.25 V, TJ = −40°C to +150°C; RLT = 60 W unless specified otherwise.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
SUPPLY (Pin VCC)
ICC
Supply Current
Dominant; VTxD = 0 V
Recessive; VTxD = VCC
45
4
65
8
mA
ICCS
Supply Current in Standby Mode
Tjunc,max = 100°C
10
15
mA
TRANSMITTER DATA INPUT (Pin TxD)
VIH
High−Level Input Voltage
Output recessive
2.0
−
VCC + 0.3
V
VIL
Low−Level Input Voltage
Output Dominant
−0.3
−
+0.8
V
IIH
High−Level Input Current
VTxD = VCC
−5
0
+5
mA
IIL
Low−Level Input Current
VTxD = 0 V
−75
−200
−350
mA
Ci
Input Capacitance
Not Tested
−
5
10
pF
TRANSMITTER MODE SELECT (Pin STB)
VIH
High−Level Input Voltage
Standby Mode
2.0
−
VCC + 0.3
V
VIL
Low−Level Input Voltage
Normal Mode
−0.3
−
+0.8
V
IIH
High−Level Input Current
VSTB = VCC
−5
0
+5
mA
IIL
Low−Level Input Current
VSTB = 0 V
−1
−4
−10
mA
Ci
Input Capacitance
Not Tested
−
5
10
pF
0.75 x
VCC
V
RECEIVER DATA OUTPUT (Pin RxD)
VOH
High−level output voltage
IRXD = −10 mA
VOL
Low−level output voltage
IRXD = 5 mA
0.25
0.45
V
Ioh
High−level output current
Vo = 0.7 x VCC
−5
−10
−15
mA
Iol
Low−level output current
Vo = 0.3 x VCC
5
10
15
mA
0.6 x
VCC
BUS LINES (Pins CANH and CANL)
Vo(reces)(norm)
Recessive Bus Voltage
VTxD = VCC; No Load
Normal Mode
2.0
2.5
3.0
V
Vo(reces)(stby)
Recessive Bus Voltage
VTxD = VCC; No Load
Standby Mode
−100
0
100
mV
Io(reces)(CANH)
Recessive Output Current at
Pin CANH
−35 V < VCANH < +35 V;
0 V < VCC < 5.25 V
−2.5
−
+2.5
mA
Io(reces)(CANL)
Recessive Output Current at
Pin CANL
−35 V < VCANL < +35 V;
0 V < VCC < 5.25 V
−2.5
−
+2.5
mA
Vo(dom)(CANH)
Dominant Output Voltage at
Pin CANH
VTxD = 0 V
3.0
3.6
4.25
V
Vo(dom)(CANL)
Dominant Output Voltage at
Pin CANL
VTxD = 0 V
0. 5
1.4
1.75
V
Vo(dif)(bus_dom)
Differential Bus Output Voltage
(VCANH − VCANL)
VTxD = 0 V; Dominant;
42.5 W < RLT < 60 W
1.5
2.25
3.0
V
Vo(dif)(bus_rec)
Differential Bus Output Voltage
(VCANH − VCANL)
VTxD = VCC; Recessive;
No Load
−120
0
+50
mV
Io(sc)(CANH)
Short Circuit Output Current at
Pin CANH
VCANH = 0 V; VTxD = 0 V
−45
−70
−120
mA
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AMIS−42675
Table 6. DC CHARACTERISTICS VCC = 4.75 V to 5.25 V, TJ = −40°C to +150°C; RLT = 60 W unless specified otherwise.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VCANL = 36 V; VTxD = 0 V
45
70
120
mA
BUS LINES (Pins CANH and CANL)
Io(sc)(CANL)
Short Circuit Output Current at
Pin CANL
Vi(dif) (th)
Differential Receiver Threshold
Voltage (see Figure 4)
−5 V < VCANL < +12 V;
−5 V < VCANH < +12V;
0.5
0.7
0.9
V
Vihcm(dif)(th)
Differential Receiver Threshold
Voltage for High Common−Mode
(see Figure 4)
35 V < VCANL < +35 V; −
35 V < VCANH < +35 V;
0.40
0.7
1.00
V
Vi(dif)(hys)
Differential Receiver Input Voltage
Hysteresis (see Figure 4)
−35 V < VCANL < +35 V;
−35 V < VCANH < +35 V;
50
70
100
mV
Ri(cm)(CANH)
Common−Mode Input
Resistance at Pin CANH
15
26
37
kW
Ri(cm)(CANL)
Common−Mode Input
Resistance at Pin CANL
15
26
37
kW
Ri(cm)(m)
Matching Between Pin CANH
and Pin CANL Common Mode
Input Resistance
−3
0
+3
%
Ri(dif)
Differential Input Resistance
25
50
75
kW
Ci(CANH)
Input Capacitance at Pin CANH
VTxD = VCC; Not Tested
7.5
20
pF
Ci(CANL)
Input Capacitance at Pin CANL
VTxD = VCC; Not Tested
7.5
20
pF
Ci(dif)
Differential Input Capacitance
VTxD = VCC; Not Tested
3.75
10
pF
−
0.7 x VCC
VCANH = VCANL
COMMON−MODE STABILIZATION (Pin VSPLIT)
VSPLIT
Reference Output Voltage at
Pin VSPLIT
Normal Mode;
−500 mA < ISPLIT < 500 mA
0.3 x
VCC
ISPLIT(i)
VSPLIT Leakage Current
Standby Mode
−5
+5
mA
ISPLIT(lim)
VSPLIT Limitation Current
Normal Mode
−3
+3
mA
CANH, CANL, Vref in
Tri−State Below POR
Level
2.2
3.5
4.7
V
150
160
180
°C
POWER−ON−RESET (POR)
PORL
POR Level
THERMAL SHUTDOWN
TJ(sd)
Shutdown Junction Temperature
TIMING CHARACTERISTICS (see Figures 3 and 4)
td(TxD−BUSon)
Delay TXD to Bus Active
Cl = 100 pF between
CANH to CANL
40
85
105
ns
td(TxD−BUSoff)
Delay TXD to Bus Inactive
Cl = 100 pF between
CANH to CANL
30
60
105
ns
td(BUSon−RXD)
Delay Bus Active to RXD
Crxd = 15 pF
25
55
105
ns
td(BUSoff−RXD)
Delay Bus Inactive to RXD
Crxd = 15 pF
40
100
105
ns
tpd(rec−dom)
Propagation Delay TXD to RXD
from Recessive to Dominant
Cl = 100 pF between
CANH to CANL
90
230
ns
td(dom−rec)
Propagation delay TXD to RXD
from Dominant to Recessive
Cl = 100 pF between
CANH to CANL
90
245
ns
td(stb−nm)
Delay Standby Mode to Normal
Mode
5
7.5
10
ms
tdbus
Dominant Time for Wake−up via
Bus
0.75
2.5
5
ms
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AMIS−42675
MEASUREMENT SETUPS AND DEFINITIONS
+5 V
100 nF
VCC
3
TxD
1 nF
1
AMIS−
42675
RxD
CANH
7
4
5
20 pF
Transient
Generator
1 nF
6
CANL
2
8
VSPLIT
PC20071006.1
GND
STB
Figure 3. Test Circuit for Transients
VRxD
High
Low
Hysteresis
PC20040829.7
0.9
0.5
Vi(dif)(hys)
Figure 4. Hysteresis of the Receiver
+5 V
100 nF
VCC
3
TxD
7
1
AMIS−
42675
RxD
6
2
STB
RLT
VSPLIT
60 W
4
8
20 pF
5
CANH
CLT
100 pF
CANL
GND
PC20071006.2
Figure 5. Test Circuit for Timing Characteristics
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AMIS−42675
HIGH
LOW
TxD
CANH
CANL
dominant
Vi(dif) =
VCANH − V CANL
0.9V
0.5V
recessive
RxD
0.7 x VCC
0.3 x VCC
td(TxD−BUSon)
td(TxD−BUSoff)
td(BUSon−RxD)
tpd(rec−dom)
td(BUSoff−RxD)
tpd(dom−rec)
PC20040829.6
Figure 6. Timing Diagram for AC Characteristics
+5 V
100 nF
VCC
3
TxD
7
Active Probe
AMIS−
42675
CANL
6
6.2 kW
4
5
2
8
20 pF
10 nF
1
Generator
RxD
6.2 kW
CANH
STB
30 W
VSPLIT
Spectrum Anayzer
30 W
47 nF
GND
PC20071006.3
Figure 7. Basic Test Set−up for EME
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AMIS−42675
Figure 8. EME Measurements
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10
AMIS−42675
DEVICE ORDERING INFORMATION
Temperature Range
Package Type
Shipping†
AMIS42675ICAH2G
−40°C − 125°C
SOIC−8
(Pb−Free)
96 Tube / Tray
AMIS42675ICAH2RG
−40°C − 125°C
SOIC−8
(Pb−Free)
3000 / Tape & Reel
Part Number
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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AMIS−42675
PACKAGE DIMENSIONS
SOIC 8
CASE 751AZ−01
ISSUE O
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent
rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur.
Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries,
affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury
or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an
Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
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Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
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For additional information, please contact your local
Sales Representative
AMIS−42675/D
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