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AMIS-42673 High-Speed 3.3 V Digital Interface CAN Transceiver
Description
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.
Features
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PIN ASSIGNMENT
TxD GND VCC RxD
1 2 3 4
8 7 6 5
V33 CANH CANL VREF
(Top View)
AMIS- 42673
PC20071003.1
* * * * * * * * * * * * *
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.
(c) Semiconductor Components Industries, LLC, 2009
January, 2009 - Rev. 3
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Publication Order Number: AMIS-42673/D
AMIS-42673
Table 1. TECHNICAL CHARACTERISTICS
Symbol VCANH VCANL Vo(dif)(bus_dom) tpd(rec-dom) tpd(dom-rec) CM-range VCM-peak VCM-step Parameter DC Voltage at Pin CANH DC Voltage at Pin CANL Differential Bus Output Voltage in Dominant State Propagation Delay TxD to RxD Propagation Delay TxD to RxD Input Common-Mode Range for Comparator Common-Mode Peak Common-Mode Step Guaranteed Differential Receiver Threshold and Leakage Current Figures 7 and 8 (Note 1) Figures 7 and 8 (Note 1) Condition 0 < VCC < 5.25 V; No Time Limit 0 < VCC < 5.25 V; No Time Limit 42.5 W < RLT < 60 W Max -45 -45 1.5 100 100 -35 -500 -150 Max +45 +45 3 230 245 +35 500 150 Unit V V V ns ns V mV mV
1. The parameters VCM-peak and VCM-step guarantee low EME.
VCC AMIS- 42673
VCC
3 Thermal shutdown
TxD
1 Driver control 7 6
CANH CANL
'S'
V33 RxD VREF
8
4
COMP
Ri(cm) +
Vcc/2
5
Ri(cm) 2
PC20071003.2
GND
Figure 1. Block Diagram
Table 2. PIN DESCRIPTION
Pin 1 2 3 4 5 6 7 8 Name TxD GND VCC RxD VREF CANL CANH V33 Description Transmit Data Input; Low Input Dominant Driver; Internal Pullup Current Ground Supply Voltage Receive Data Output; Dominant Transmitter Low Output Reference Voltage Output LOW-Level CAN Bus Line (Low in Dominant Mode) HIGH-Level CAN Bus Line (High in Dominant Mode) 3.3 V Supply for Digital I/O
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AMIS-42673
Table 3. ABSOLUTE MAXIMUM RATINGS
Symbol VCC V33 VCANH VCANL VTxD VRxD VREF Vtran(CANH) Vtran(CANL) Vtran(VREF) Vesd(CANL/
CANH)
Parameter Supply Voltage I/O Interface Voltage DC Voltage at Pin CANH DC Voltage at Pin CANL DC Voltage at Pin TxD DC Voltage at Pin RxD DC Voltage at Pin VREF Transient Voltage at Pin CANH Transient Voltage at Pin CANL Transient Voltage at Pin VREF Electrostatic Discharge Voltage at CANH and CANL Pin Electrostatic Discharge Voltage at All Other Pins Static Latch-up at All Pins Storage Temperature Ambient Temperature Maximum Junction Temperature Note 2 Note 2 Note 2 Note 4 Note 6 Note 4 Note 6 Note 5
Conditions
Min -0.3 -0.3
Max +7 +7 +45 +45 VCC + 0.3 VCC + 0.3 VCC + 0.3 +150 +150 +150 +8 +500 +4 +250 100
Unit V V V V V V V V V V kV V kV V mA C C C
0 < VCC < 5.25 V; No Time Limit 0 < VCC < 5.25 V; No Time Limit
-45 -45 -0.3 -0.3 -0.3 -150 -150 -150 -8 -500 -4 -250
Vesd Latch-up Tstg TA TJ
-55 -40 -40
+155 +125 +150
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 Rth(vj-a) Rth(vj-s) Parameter Thermal Resistance from Junction-to-Ambient in SO-8 Package Thermal Resistance from Junction-to-Substrate of Bare Die Conditions In Free Air In Free Air Value 145 45 Unit k/W k/W
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AMIS-42673
APPLICATION INFORMATION
VBAT
IN
5V- reg
OUT
60 W
60 W 47 nF
IN
3.3V- reg
OUT VCC RxD
4 8
V33
3
VCC
7
CAN BUS
CANH VREF CANL 60 W 60 W 47 nF
CAN controller
PC20071003.3
TxD
AMIS- 42673
1 2
5 6
GND
GND
Figure 2. Application Diagram
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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 4.75 to 5.25 V 4.75 to 5.25 V VCC < PORL (Unpowered) PORL < VCC < 4.75 V Pin TxD 0 1 (or floating) x >2V Pin CANH High VCC/2 0 V < CANH < VCC 0 V < CANH < VCC Pin CANL Low VCC/2 0 V < CANL < VCC 0 V < CANL < VCC Bus State Dominant Recessive Recessive Recessive Pin RxD 0 1 1 1
Overtemperature Detection
A thermal protection circuit protects the IC from damage by switching off the transmitter if the junction temperature exceeds a value of approximately 160C. 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.
High Communication Speed Range
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.
3.3 V Interface
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.
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.
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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 = -40C to +150C; RLT = 60 W unless specified
Symbol SUPPLY (Pin VCC and pin V33) ICC I33 I33 Supply Current I/O Interface Current I/O Interface Current (Note 7) Dominant; VTXD = 0 V Recessive; VTXD = VCC V33 = 3.3 V; CL = 20 pF; recessive V33 = 3.3 V; CL = 20pF; 1 Mbps 45 4 65 8 1 170 mA mA mA Parameter Conditions Min Typ Max Unit
otherwise.
TRANSMITTER DATA INPUT (Pin TxD) VIH VIL IIH IIL Ci VOH VOL Ioh Iol VREF VREF_CM HIGH-Level Input Voltage LOW-Level Input Voltage HIGH-Level Input Current LOW-Level Input Current Input Capacitance (Note 7) HIGH-Level Output Voltage LOW-Level Output Voltage HIGH-Level Output Current (Note 7) LOW-Level Output Current (Note 7) Reference Output Voltage Reference Output Voltage for Full Common-Mode Range IRXD = - 10 mA IRXD = 5 mA VRxD = 0.7 x V33 VRxD = 0.45 V -50 mA < IVREF < +50 mA -35 V < VCANH < +35 V; -35 V < VCANL < +35 V VTxD = VCC; no load VTxD = VCC; no load -35 V < VCANH < +35 V; 0 V < VCC < 5.25 V -35 V < VCANL < +35 V; 0 V < VCC < 5.25 V VTxD = 0 V VTxD = 0 V VTxD = 0 V; Dominant; 42.5 W < RLT < 60 W VTxD = VCC; Recessive; No Load Io(sc) (CANH) Io(sc) (CANL) Vi(dif)(th) Short Circuit Output Current at Pin CANH Short Circuit Output Current at Pin CANL Differential Receiver Threshold Voltage VCANH = 0 V; VTxD = 0 V VCANL = 36 V; VTxD = 0 V -5 V < VCANL < +12 V; -5 V < VCANH < +12 V; See Figure 4 -10 5 0.45 x VCC 0.40 x VCC Output recessive Output dominant VTxD = V33 VTxD = 0 V 2.0 -0.3 -1 -50 - 0.7 x V33 - - 0 -200 5 0.75 x V33 0.18 -15 10 0.50 x VCC 0.50 x VCC 0.35 -20 15 0.55 x VCC 0.60 x VCC VCC +0.8 +1 -300 10 V V mA mA pF V V mA mA V V
RECEIVER DATA OUTPUT (Pin RxD)
REFERENCE VOLTAGE OUTPUT (Pin VREF)
BUS LINES (Pins CANH and CANL) Vo(reces)(CANH) Vo(reces)(CANL) Io(reces)(CANH) Io(reces)(CANL) Vo(dom)(CANH) Vo(dom)(CANL) Vo(dif)(bus) Recessive Bus Voltage at Pin CANH Recessive Bus Voltage at Pin CANL Recessive Output Current at Pin CANH Recessive Output Current at Pin CANL Dominant Output Voltage at Pin CANH Dominant Output Voltage at Pin CANL Differential Bus Output Voltage (VCANH - VCANL) 2.0 2.0 -2.5 -2.5 3.0 0. 5 1.5 -120 -45 45 0.5 2.5 2.5 - - 3.6 1.4 2.25 0 -70 70 0.7 3.0 3.0 +2.5 +2.5 4.25 1.75 3.0 +50 -95 120 0.9 V V mA mA V V V mV mA mA V
7. Not tested at ATE
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AMIS-42673
Table 6. DC CHARACTERISTICS VCC = 4.75 V to 5.25 V, V33 = 2.9 V to 3.6 V; TJ = -40C to +150C; RLT = 60 W unless specified
Symbol BUS LINES (Pins CANH and CANL) Vihcm(dif)(th) Differential Receiver Threshold Voltage for High Common-Mode Differential Receiver Input Voltage Hysteresis -35 V < VCANL < +35 V; -35 V < VCANH < +35 V; See Figure 4 -35 V < VCANL < +35 V; -35 V < VCANH < +35 V; See Figure 4 0.25 0.7 1.05 V Parameter Conditions Min Typ Max Unit
otherwise.
Vi(dif)(hys)
50
70
100
mV
Ri(cm)(CANH) Ri(cm) (CANL) Ri(cm)(m) Ri(dif) Ci(CANH) Ci(CANL) Ci(dif) ILI(CANH) ILI(CANL) VCM-peak VCM-step
Common-Mode Input Resistance at Pin CANH Common-Mode Input Resistance at Pin CANL Matching Between Pin CANH and Pin CANL Common-Mode Input Resistance Differential Input Resistance Input Capacitance at Pin CANH Input Capacitance at Pin CANL Differential Input Capacitance Input Leakage Current at Pin CANH Input Leakage Current at Pin CANL Common-Mode Peak During Transition from Dom Rec or Rec Dom Difference in Common-Mode Between Dominant and Recessive State VTxD = VCC; Not Tested VTxD = VCC; Not Tested VTxD = VCC; Not Tested VCC = 0 V; VCANH = 5 V VCC = 0 V; VCANL = 5 V Figures 7 and 8 Figures 7 and 8 VCANH = VCANL
15 15 -3 25
25 25 0 50 7.5 7.5 3.75
37 37 +3 75 20 20 10 250 250 500 150
kW kW % kW pF pF pF mA mA mV mV
BUS LINES (Pins CANH and CANL)
10 10 -500 -150
170 170
POWER-ON-RESET PORL POR Level CANH, CANL, Vref in Tri-State Below POR Level 2.2 3.5 4.7 V
THERMAL SHUTDOWN TJ(sd) td(TxD-BUSon) td(TxD-BUSoff) td(BUSon-RxD) td(BUSoff-RxD) tpd(rec-dom) td(dom-rec) Shutdown Junction Temperature Delay TxD to Bus Active Delay TxD to Bus Inactive Delay Bus Active to RxD Delay Bus Inactive to RxD Propagation Delay TxD to RxD from Recessive to Dominant Propagation Delay TxD to RxD from Dominant to Recessive 150 40 30 25 65 100 100 160 85 60 55 100 180 110 110 110 135 230 245 C ns ns ns ns ns ns TIMING CHARACTERISTICS (See Figures 6 and 7)
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 +150C;
RLT = 60 W unless specified otherwise. Symbol Parameter Conditions Min Typ Max Unit
RECEIVER DATA OUTPUT (Pin RxD) Ioh Iol HIGH-Level Output Current LOW-Level Output Current VOH > 0.9 x V33 VOL < 0.1 x V33 -2.6 4 mA mA
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AMIS-42673
MEASUREMENT SETUPS AND DEFINITIONS
+3.3 V +5 V 100 nF TxD VCC
3 1
100 nF V33
8 7
CANH 1 nF VREF 1 nF CANL
PC20071003.4
AMIS- 42673
RxD
4 2
5
Transient Generator
6
20 pF
GND
Figure 3. Test Circuit for Automotive Transients
VRxD High Low
Hysteresis PC20040829.7
0.5
0.9
Vi(dif)(hys)
Figure 4. Hysteresis of the Receiver
+3.3 V +5 V 100 nF VCC
3
100 nF V33
8 7 1
TxD
CANH RLT VREF 60 W CLT 100 pF
AMIS- 42673
RxD
4 2
5
6
CANL
PC20071003.5
20 pF
GND
Figure 5. Test Circuit for Timing Characteristics
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AMIS-42673
TxD
HIGH LOW
CANH CANL
dominant
Vi(dif) = VCANH - V CANL
0.9V
0.5V recessive
RxD td(TxD-BUSon) tpd(rec-dom)
0.3 x V 33
0.7 x V 33
td(TxD-BUSoff) td(BUSon-RxD) tpd(dom-rec) td(BUSoff-RxD)
PC20040829.6
Figure 6. Timing Diagram for AC Characteristics
+3.3 V +5 V VCC
3
100 nF V33
8 7 1
TxD
CANH
6.2 kW 10 nF Active Probe
Generator RxD
4
AMIS- 6 42673
5 2
CANL 6.2 kW 30 W VREF 30 W 47 nF
Spectrum Anayzer
20 pF
GND
Figure 7. Basic Test Setup for Electromagnetic Measurement
PC20071003.6
CANH
CANL
recessive
VCM = 0.5*(VCANH+VCANL)
VCM-step
VCM-peak
PC20040829.7
VCM-peak
Figure 8. Common-Mode Voltage Peaks (See Measurement Setup Figure 7)
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AMIS-42673
DEVICE ORDERING INFORMATION
Part Number AMIS42673ICAG1G AMIS42673ICAG1RG Temperature Range -40C - 125C -40C - 125C Package Type SOIC-8 (Pb-Free) SOIC-8 (Pb-Free) Shipping 96 Tube / Tray 3000 / Tape & Reel
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-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
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
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AMIS-42673/D

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