AMIS 42673 D

AMIS-42673
High-Speed 3.3 V Digital
Interface CAN Transceiver
Description
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•
•
•
•
•
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PIN ASSIGNMENT
TxD
1
8
V33
GND
2
7
CANH
VCC
3
6
CANL
RxD
4
5
VREF
PC20071003.1
(Top View)
Features
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AMIS−
42673
The AMIS−42673 CAN transceiver is the interface between a
controller area network (CAN) protocol controller and the physical
bus. It may be used in both 12V and 24 V systems. The digital
interface level is powered from a 3.3 V supply providing true I/O
voltage levels for 3.3 V CAN controllers.
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−42673 is able to reach outstanding levels of electromagnetic
susceptibility (EMS). Similarly, extremely low electromagnetic
emission (EME) is achieved by the excellent matching of the output
signals.
The AMIS−42673 is primarily intended 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−42673 allows low
transmit data rates down to 10 kbit/s or lower.
True 3.3 V or 5.0 V Logic Level Interface
Fully Compatible with the “ISO 11898−2” Standard
Wide Range of Bus Communication Speed (0 up to 1 Mbit/s)
Allows Low Transmit Data Rate in Networks Exceeding 1 km
Ideally Suited for 12 V and 24 V Applications
Low Electromagnetic Emission (EME); Common−Mode−Choke is
No Longer Required
Differential Receiver with Wide Common−Mode Range ($35 V) for
High Electromagnetic Susceptibility (EMS)
No Disturbance of the Bus Lines with an Unpowered Node
Thermal Protection
Bus Pins Protected Against Transients
Short Circuit Proof to Supply Voltage and Ground
ESD Protection for CAN Bus at $8 kV
These are Pb−Free Devices*
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
*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, 2009
January, 2009 − Rev. 3
1
Publication Order Number:
AMIS−42673/D
AMIS−42673
Table 1. TECHNICAL CHARACTERISTICS
Max
Max
Unit
VCANH
Symbol
DC Voltage at Pin CANH
Parameter
0 < VCC < 5.25 V; No Time Limit
Condition
−45
+45
V
VCANL
DC Voltage at Pin CANL
0 < VCC < 5.25 V; No Time Limit
−45
+45
V
Vo(dif)(bus_dom)
Differential Bus Output Voltage in
Dominant State
42.5 W < RLT < 60 W
1.5
3
V
tpd(rec−dom)
Propagation Delay TxD to RxD
100
230
ns
tpd(dom−rec)
Propagation Delay TxD to RxD
100
245
ns
CM−range
Input Common−Mode Range for
Comparator
−35
+35
V
VCM−peak
Common−Mode Peak
Figures 7 and 8 (Note 1)
−500
500
mV
VCM−step
Common−Mode Step
Figures 7 and 8 (Note 1)
−150
150
mV
Guaranteed Differential Receiver
Threshold and Leakage Current
1. The parameters VCM−peak and VCM−step guarantee low EME.
VCC
AMIS−42673
VCC
TxD
3
Thermal
shutdown
1
’S’
V33
RxD
7
Driver
control
6
8
4
COMP
Ri(cm)
+
VREF
5
Vcc/2
Ri(cm)
2
GND
PC20071003.2
Figure 1. Block Diagram
Table 2. PIN DESCRIPTION
Pin
Name
Description
1
TxD
Transmit Data Input; Low Input → Dominant Driver; Internal Pullup Current
2
GND
Ground
3
VCC
Supply Voltage
4
RxD
Receive Data Output; Dominant Transmitter → Low Output
5
VREF
Reference Voltage Output
6
CANL
LOW−Level CAN Bus Line (Low in Dominant Mode)
7
CANH
HIGH−Level CAN Bus Line (High in Dominant Mode)
8
V33
3.3 V Supply for Digital I/O
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2
CANH
CANL
AMIS−42673
Table 3. ABSOLUTE MAXIMUM RATINGS
Min
Max
Unit
VCC
Symbol
Supply Voltage
−0.3
+7
V
V33
I/O Interface Voltage
−0.3
+7
V
VCANH
DC Voltage at Pin CANH
0 < VCC < 5.25 V; No Time Limit
−45
+45
V
VCANL
DC Voltage at Pin CANL
0 < VCC < 5.25 V; No Time Limit
−45
+45
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
VREF
DC Voltage at Pin VREF
−0.3
VCC + 0.3
V
Vtran(CANH)
Transient Voltage at Pin CANH
Note 2
−150
+150
V
Vtran(CANL)
Transient Voltage at Pin CANL
Note 2
−150
+150
V
Vtran(VREF)
Transient Voltage at Pin VREF
Note 2
−150
+150
V
Vesd(CANL/
Electrostatic Discharge Voltage at
CANH and CANL Pin
Note 4
Note 6
−8
−500
+8
+500
kV
V
Vesd
Electrostatic Discharge Voltage at All
Other Pins
Note 4
Note 6
−4
−250
+4
+250
kV
V
Latch−up
Static Latch−up at All Pins
Note 5
100
mA
Tstg
Storage Temperature
−55
+155
°C
TA
Ambient Temperature
−40
+125
°C
TJ
Maximum Junction Temperature
−40
+150
°C
CANH)
Parameter
Conditions
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 4).
3. Standardized human body model system ESD pulses in accordance to IEC 1000.4.2.
4. Standardized human body model ESD pulses in accordance to MIL883 method 3015. Supply pin 8 is ±4kV.
5. Static latch−up immunity: static latch−up protection level when tested according to EIA/JESD78.
6. 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
SO−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−42673
APPLICATION INFORMATION
VBAT
IN
5V−reg
60 W
OUT
60 W
47 nF
IN
3.3V−
reg
OUT
VCC
V33
8
RxD
VCC
3
4
CAN
controller
TxD
7
AMIS−
42673
5
6
1
GND
Figure 2. Application Diagram
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4
CANH
VREF
CANL
60 W
2
PC20071003.3
CAN
BUS
GND
60 W
47 nF
AMIS−42673
FUNCTIONAL DESCRIPTION
General
Operating Modes
The AMIS−42673 is the interface between the CAN
protocol controller and the physical bus. It is intended for
use in industrial and automotive applications requiring baud
rates up to 1 Mbit/s. It provides differential transmit
capability to the bus and differential receiver capability to
the CAN protocol controller. It is fully compatible to the
“ISO 11898−2” standard.
AMIS−42673 only operates in high−speed mode as
illustrated in Table 5.
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.
Table 5. FUNCTIONAL TABLE OF AMIS−42673; x = don’t care
VCC
Pin TxD
Pin CANH
Pin CANL
Bus State
Pin RxD
4.75 to 5.25 V
0
High
Low
Dominant
0
4.75 to 5.25 V
1
(or floating)
VCC/2
VCC/2
Recessive
1
x
0 V < CANH < VCC
0 V < CANL < VCC
Recessive
1
>2V
0 V < CANH < VCC
0 V < CANL < VCC
Recessive
1
VCC < PORL (Unpowered)
PORL < VCC < 4.75 V
Overtemperature Detection
The pins CANH and CANL are protected from
automotive electrical transients (according to “ISO 7637”;
see Figure 3).
Should TxD become disconnected, this pin is pulled high
internally.
When the VCC supply is removed, Pins TxD and RxD will
be floating. This prevents the AMIS−42673 from being
supplied by the CAN controller through the I/O Pins.
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.
3.3 V Interface
High Communication Speed Range
AMIS−42673 may be used to interface with 3.3 V or 5 V
controllers by use of the V33 pin. This pin may be supplied
with 3.3 V or 5 V to have the corresponding digital interface
voltage levels.
When the V33 pin is supplied at 2.5 V, even interfacing
with 2.5 V CAN controllers is possible. See also Digital
Output Characteristics @ V33 = 2.5 V, Table . In this case a
pull−up resistor from TxD to V33 is necessary.
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.
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5
AMIS−42673
Definitions
All voltages are referenced to GND (Pin 2). Positive currents flow into the IC. Sinking current means that the current is
flowing into the pin. Sourcing current means that the current is flowing out of the pin.
Table 6. DC CHARACTERISTICS VCC = 4.75 V to 5.25 V, V33 = 2.9 V to 3.6 V; TJ = −40°C to +150°C; RLT = 60 W unless specified
otherwise.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
45
4
65
8
mA
SUPPLY (Pin VCC and pin V33)
ICC
Supply Current
Dominant; VTXD = 0 V
Recessive; VTXD = VCC
I33
I/O Interface Current
V33 = 3.3 V; CL = 20 pF;
recessive
1
mA
I33
I/O Interface Current (Note 7)
V33 = 3.3 V; CL = 20pF;
1 Mbps
170
mA
V
TRANSMITTER DATA INPUT (Pin TxD)
VIH
HIGH−Level Input Voltage
Output recessive
2.0
−
VCC
VIL
LOW−Level Input Voltage
Output dominant
−0.3
−
+0.8
V
IIH
HIGH−Level Input Current
VTxD = V33
−1
0
+1
mA
IIL
LOW−Level Input Current
VTxD = 0 V
−50
−200
−300
mA
Ci
Input Capacitance (Note 7)
−
5
10
pF
0.7 x
V33
0.75 x
V33
RECEIVER DATA OUTPUT (Pin RxD)
VOH
HIGH−Level Output Voltage
IRXD = − 10 mA
VOL
LOW−Level Output Voltage
IRXD = 5 mA
Ioh
HIGH−Level Output Current (Note 7)
VRxD = 0.7 x V33
Iol
LOW−Level Output Current (Note 7)
VRxD = 0.45 V
V
0.18
0.35
V
−10
−15
−20
mA
5
10
15
mA
REFERENCE VOLTAGE OUTPUT (Pin VREF)
VREF
Reference Output Voltage
−50 mA < IVREF < +50 mA
0.45 x
VCC
0.50 x
VCC
0.55 x
VCC
V
VREF_CM
Reference Output Voltage for Full
Common−Mode Range
−35 V < VCANH < +35 V;
−35 V < VCANL < +35 V
0.40 x
VCC
0.50 x
VCC
0.60 x
VCC
V
BUS LINES (Pins CANH and CANL)
Vo(reces)(CANH)
Recessive Bus Voltage at Pin CANH
VTxD = VCC; no load
2.0
2.5
3.0
V
Vo(reces)(CANL)
Recessive Bus Voltage at Pin CANL
VTxD = VCC; no load
2.0
2.5
3.0
V
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)
Differential Bus Output Voltage
(VCANH − VCANL)
VTxD = 0 V; Dominant;
42.5 W < RLT < 60 W
1.5
2.25
3.0
V
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
−95
mA
Io(sc) (CANL)
Short Circuit Output Current at Pin CANL
VCANL = 36 V; VTxD = 0 V
45
70
120
mA
Vi(dif)(th)
Differential Receiver Threshold Voltage
0.5
0.7
0.9
V
−5 V < VCANL < +12 V;
−5 V < VCANH < +12 V;
See Figure 4
7. Not tested at ATE
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6
AMIS−42673
Table 6. DC CHARACTERISTICS VCC = 4.75 V to 5.25 V, V33 = 2.9 V to 3.6 V; TJ = −40°C to +150°C; RLT = 60 W unless specified
otherwise.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
BUS LINES (Pins CANH and CANL)
Vihcm(dif)(th)
Differential Receiver Threshold Voltage for
High Common−Mode
−35 V < VCANL < +35 V;
−35 V < VCANH < +35 V;
See Figure 4
0.25
0.7
1.05
V
Vi(dif)(hys)
Differential Receiver Input Voltage Hysteresis
−35 V < VCANL < +35 V;
−35 V < VCANH < +35 V;
See Figure 4
50
70
100
mV
Ri(cm)(CANH)
Common−Mode Input Resistance at Pin
CANH
15
25
37
kW
Ri(cm) (CANL)
Common−Mode Input Resistance at Pin
CANL
15
25
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
7.5
20
pF
VCANH = VCANL
BUS LINES (Pins CANH and CANL)
Ci(CANH)
Input Capacitance at Pin CANH
VTxD = VCC; Not Tested
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
ILI(CANH)
Input Leakage Current at Pin CANH
VCC = 0 V; VCANH = 5 V
10
170
250
mA
ILI(CANL)
Input Leakage Current at Pin CANL
VCC = 0 V; VCANL = 5 V
10
170
250
mA
VCM−peak
Common−Mode Peak During Transition from
Dom → Rec or Rec → Dom
Figures 7 and 8
−500
500
mV
VCM−step
Difference in Common−Mode Between
Dominant and Recessive State
Figures 7 and 8
−150
150
mV
POWER−ON−RESET
PORL
CANH, CANL, Vref in
Tri−State Below POR
Level
POR Level
2.2
3.5
4.7
V
150
160
180
°C
THERMAL SHUTDOWN
TJ(sd)
Shutdown Junction Temperature
TIMING CHARACTERISTICS (See Figures 6 and 7)
td(TxD−BUSon)
Delay TxD to Bus Active
40
85
110
ns
td(TxD−BUSoff)
Delay TxD to Bus Inactive
30
60
110
ns
td(BUSon−RxD)
Delay Bus Active to RxD
25
55
110
ns
td(BUSoff−RxD)
Delay Bus Inactive to RxD
65
100
135
ns
tpd(rec−dom)
Propagation Delay TxD to RxD from
Recessive to Dominant
100
230
ns
td(dom−rec)
Propagation Delay TxD to RxD from
Dominant to Recessive
100
245
ns
7. Not tested at ATE
Table 7. DIGITAL OUTPUT CHARACTERISTICS @ V33 = 2.5 V VCC = 4.75 to 5.25 V; V33 = 2.5 V $5%; TJ = −40 to +150°C;
RLT = 60 W unless specified otherwise.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
RECEIVER DATA OUTPUT (Pin RxD)
Ioh
HIGH−Level Output Current
VOH > 0.9 x V33
Iol
LOW−Level Output Current
VOL < 0.1 x V33
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7
−2.6
mA
4
mA
AMIS−42673
MEASUREMENT SETUPS AND DEFINITIONS
+3.3 V
100 nF
+5 V
VCC
100 nF
V33
3
TxD
8
1 nF
1
AMIS−
42673
RxD
CANH
7
4
5
Transient
Generator
1 nF
6
CANL
2
20 pF
VREF
PC20071003.4
GND
Figure 3. Test Circuit for Automotive Transients
VRxD
High
Low
Hysteresis
0.9
0.5
PC20040829.7
Vi(dif)(hys)
Figure 4. Hysteresis of the Receiver
+3.3 V
100 nF
+5 V
100 nF
VCC
V33
3
TxD
8
1
AMIS−
42673
RxD
CANH
7
4
5
RLT
VREF
60 W
6
2
20 pF
GND
CLT
100 pF
CANL
PC20071003.5
Figure 5. Test Circuit for Timing Characteristics
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8
AMIS−42673
HIGH
LOW
TxD
CANH
CANL
dominant
Vi(dif) =
VCANH − VCANL
0.9V
0.5V
recessive
RxD
0.7 x V33
0.3 x V33
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
+3.3 V
100 nF
+5 V
VCC
V33
3
TxD
8
7
10 nF
1
AMIS− 6
42673
Generator
RxD
6.2 kW
CANH
4
5
2
20 pF
Active Probe
CANL
6.2 kW
30 W
VREF
Spectrum Anayzer
30 W
47 nF
GND
PC20071003.6
Figure 7. Basic Test Setup for Electromagnetic Measurement
CANH
CANL
recessive
VCM−step
VCM =
0.5*(VCANH+VCANL)
VCM−peak
VCM−peak
PC20040829.7
Figure 8. Common−Mode Voltage Peaks (See Measurement Setup Figure 7)
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AMIS−42673
DEVICE ORDERING INFORMATION
Temperature Range
Package Type
Shipping†
AMIS42673ICAG1G
−40°C − 125°C
SOIC−8
(Pb−Free)
96 Tube / Tray
AMIS42673ICAG1RG
−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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10
AMIS−42673
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
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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−42673/D
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