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| AMIS-42671 High Speed Autobaud CAN Transceiver General Description The AMIS-42671 CAN transceiver with autobaud 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-42671 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-42671 is primarily intended for industrial network 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-42671 allows low transmit data rates down 10 kbit/s or lower. The autobaud function allows the CAN controller to determine the incoming baud rate without influencing the CAN communication on the bus. Features http://onsemi.com PIN ASSIGNMENT TxD GND VCC RxD 1 2 3 4 8 7 6 5 AUTB CANH CANL VREF (Top View) AMIS- 42671 PC20070929.1 * * * * * * * * * * * * * * * Fully compatible with the ISO 11898-2 standard Autobaud function 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 industrial and automotive applications Low electromagnetic emission (EME), common-mode choke is no longer required Differential receiver with wide common-mode range ($35 V) for high EMS No disturbance of the bus lines with an un-powered node Thermal protection Bus pins protected against transients Silent mode in which the transmitter is disabled Short circuit proof to supply voltage and ground Logic level inputs compatible with 3.3 V devices 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 12 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 1 Publication Order Number: AMIS-42671/D AMIS-42671 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 Condition 0 < VCC < 5.25V; no time limit 0 < VCC < 5.25V; no time limit 42.5W < RLT < 60W See Figure 7 See Figure 7 Guaranteed differential receiver threshold and leakage current See Figures 8 and 9 (Note 1) See Figures 8 and 9 (Note 1) Max -45 -45 1.5 70 100 -35 -500 -150 Max +45 +45 3 245 245 +35 500 150 Unit V V V ns ns V mV mV 1. The parameters VCM-peak and VCM-step guarantee low electromagnetic emission. http://onsemi.com 2 AMIS-42671 VCC AUTB 8 Thermal shutdown VCC 3 TxD 1 Slope Control 7 Driver control 6 CANH CANL Autobaud Control AMIS-42671 COMP RxD VREF 4 Ri(cm) + Vcc/2 5 Ri(cm) 2 PC20070930.2 Figure 1. Block Diagram GND Table 2. PIN DESCRIPTION Pin 1 2 3 4 5 6 7 8 Name TxD GND VCC RxD VREF CANL CANH AUTB 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) Autobaud Mode Control Input; Internal Pulldown Current http://onsemi.com 3 AMIS-42671 Table 3. ABSOLUTE MAXIMUM RATINGS Symbol VCC VCANH VCANL VTxD VRxD VAUTB VREF Vtran(CANH) Vtran(CANL) Vesd Latch-up Tstg TA TJ Supply 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 AUTB DC Voltage at Pin VREF Transient Voltage at Pin CANH Transient Voltage at Pin CANL Electrostatic Discharge Voltage at All Pins Static Latch-up at all Pins Storage Temperature Ambient Temperature Maximum Junction Temperature Note 2 Note 2 Note 3 Note 4 Note 5 -55 -40 -40 0 < VCC < 5.25 V; No Time limit 0 < VCC < 5.25 V; No Time Limit Parameter Conditions Min -0.3 -45 -45 -0.3 -0.3 -0.3 -0.3 -150 -150 -4 -500 Max +7 +45 +45 VCC + 0.3 VCC + 0.3 VCC + 0.3 VCC + 0.3 +150 +150 +4 +500 100 +155 +125 +150 Unit V V V V V V V V V kV V mA C C 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 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 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 150 45 Unit k/W k/W http://onsemi.com 4 AMIS-42671 APPLICATION INFORMATION VBAT IN 5V- reg OUT VCC AUTB 3 8 4 1 2 7 60 W VCC CANH VREF CANL 60 W GND 60 W 47 nF CAN controller RxD TxD AMIS- 42671 5 6 CAN BUS 60 W 47 nF GND PC20071001.1 Figure 2. Application Diagram http://onsemi.com 5 AMIS-42671 FUNCTIONAL DESCRIPTION Operating Modes The behavior of AMIS-42671 under various conditions is illustrated in Table 5 below. In case the device is powered, one of two operating modes can be selected through Pin AUTB. Table 5. FUNCTIONAL TABLE OF AMIS-42671 WHEN NOT CONNECTED TO THE BUS; x = don't care VCC 4.75 to 5.25 V 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) 1 (or floating) x >2 V Pin AUTB 0 (or floating) 1 x x x Pin CANH High VCC/2 VCC/2 0 V < CANH < VCC 0 V < CANH < VCC Pin CANL Low VCC/2 VCC/2 0V < CANL < VCC 0V < CANL < VCC Bus State Dominant Recessive Recessive Recessive Recessive Pin RxD 0 1 1 1 1 High-Speed Mode Autobaud Mode If pin AUTB is pulled low (or left floating), the transceiver is in its high-speed mode and 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 line outputs are optimized to give extremely low electromagnetic emissions. If Pin AUTB is pulled high, AMIS-42671 is in Autobaud mode. The transmitter is disabled while the receiver remains active. All other IC functions also continue to operate. Normal bus activity can be monitored at the RxD pin and transmit data on TxD is looped back to RxD without influencing the CAN communication. TxD CANH CANL RxD AUTB PC20071002.4 Figure 3. Simplified Schematic Diagram of Autobaud Function In Autobaud mode the local CAN controller is able to detect the used communication speed of other transmitting network nodes. Bus communication is received and via the RxD pin sent to the CAN controller. If the CAN controller operates at the wrong baud rate, it will transmit an error frame. This message will be looped back to the CAN controller which will increment its error counter. The CAN controller will be reset with another baud rate. When an error-free message is received, the correct baud rate is detected. A logic low may now be applied to Pin AUTB, returning to the high-speed mode. 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 necessary when a bus line short-circuits. http://onsemi.com 6 AMIS-42671 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 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 4). Pin TxD is pulled high internally should the input become disconnected. A current-limiting circuit protects the transmitter output stage from damage caused by an accidental short-circuit to http://onsemi.com 7 AMIS-42671 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, TA = -40C to +150C; RLT = 60 W unless specified otherwise. Symbol SUPPLY (Pin VCC) ICC Supply current Dominant; VTXD = 0V Recessive; VTXD = VCC 25 2 45 4 65 8 mA Parameter Conditions Min Typ Max Unit TRANSMITTER DATA INPUT (Pin TxD) VIH VIL IIH IIL Ci VIH VIL IIH IIL VOH VOL VREF VREF_CM High-Level Input Voltage Low-Level Input Voltage High-Level Input Current Low-Level Input Current Input Capacitance Output Recessive Output Dominant VTxD = VCC VTxD = 0V Not Tested 2.0 -0.3 -1 -75 - - - 0 -200 5 VCC+ 0.3 +0.8 +1 -350 10 V V mA mA pF MODE SELECT (Pin AUTB) High-Level Input Voltage Low-Level Input Voltage High-Level Input Current Low-Level Input Current Autobaud Mode High-Speed Mode VS = 2 V VS = 0.8 V IRXD = -10 mA IRXD = 6 mA 0.45 x VCC 0.40 x VCC 2.0 -0.3 20 15 - - 30 30 VCC+ 0.3 +0.8 50 45 V V mA mA Receiver Data Output (Pin RxD) High-Level Output Voltage Low-Level Output Voltage 0.6 x VCC 0.75 x VCC 0.25 0.45 V V REFERENCE VOLTAGE OUTPUT (Pin VREF) Reference Output Voltage Reference Output Voltage for Full Common Mode Range -50 mA < IVREF < +50 mA -35 V http://onsemi.com 8 AMIS-42671 Table 6. DC CHARACTERISTICS VCC = 4.75 V to 5.25 V, TA = -40C to +150C; RLT = 60 W unless specified otherwise. Symbol BUS LINES (Pins CANH and CANL) Vi(dif)(th) Differential Receiver Threshold voltage -5 V < VCANL < +10 V; -5 V < VCANH < +10 V; See -35 V < VCANL < +35 V; -35 V < VCANH < +35 V; See -5 V < VCANL < +10 V; -5 V < VCANH < +10 V; See 0.5 0.7 0.9 V Parameter Conditions Min Typ Max Unit Vihcm(dif)(th) Differential Receiver Threshold Voltage for High Common-Mode Differential Receiver Input Voltage Hysteresis 0.25 0.7 1.05 V Vi(dif)(hys) 50 70 100 mV Ri(cm)(CANH) Ri(cm)(CANL) Ri(cm)(m) Ri(dif) 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 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 See Figures 8 and 9 See Figures 8 and 9 VCANH = VCANL VCANH = VCANL 15 15 -3 25 -3 25 25 25 0 50 0 50 7.5 7.5 3.75 37 37 +3 75 +3 75 20 20 10 250 250 500 150 kW kW % kW % kW pF pF pF mA mA mV mV 10 10 -500 -150 170 170 POWER-ON-RESET (POR) 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 150 160 180 C TIMING CHARACTERISTICS (see Figures 6 and 7) 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 Vs = 0 V Vs = 0 V Vs = 0 V Vs = 0 V Vs = 0 V Vs = 0 V 40 30 25 65 70 100 85 60 55 100 130 105 105 135 245 245 ns ns ns ns ns ns http://onsemi.com 9 AMIS-42671 MEASUREMENT SETUPS AND DEFINITIONS +5 V 100 nF 3 VCC 7 1 TxD CANH 1 nF VREF 1 nF CANL PC20071002.3 AMIS- 42671 RxD 4 8 2 5 Transient Generator 6 20 pF AUTB GND Figure 4. Test Circuit for Transients VRxD High Low Hysteresis PC20040829.7 0.5 0.9 Vi(dif)(hys) Figure 5. Hysteresis of the Receiver +5 V 100 nF 3 VCC 7 1 TxD CANH RLT VREF 60 W CLT 100 pF AMIS- 42671 RxD 4 8 2 5 6 CANL PC20071002.3 20 pF AUTB GND Figure 6. Test Circuit for Timing Characteristics http://onsemi.com 10 AMIS-42671 TxD HIGH LOW CANH CANL dominant Vi(dif) = VCANH - VCANL 0.9V 0.5V recessive RxD td(TxD-BUSon) tpd(rec-dom) 0.3 x V CC 0.7 x V CC td(TxD-BUSoff) td(BUSon-RxD) tpd(dom-rec) td(BUSoff-RxD) PC20040829.6 Figure 7. Timing Diagram for AC Characteristics +5 V 100 nF 3 VCC 7 1 TxD CANH 6.2 kW 10 nF Active Probe Spectrum Anayzer Generator RxD 4 AMIS- 42671 CANL 6 6.2 kW 5 30 W VREF 30 W 47 nF PC20071002.2 8 2 20 pF AUTB GND Figure 8. Basic Test Setup for Electromagnetic Measurement CANH CANL recessive VCM = 0.5*(VCANH+VCANL) VCM-step VCM-peak PC20040829.7 VCM-peak Figure 9. Common-Mode Voltage Peaks (see Measurement Setup Figure 8) http://onsemi.com 11 AMIS-42671 DEVICE ORDERING INFORMATION Part Number AMIS42671ICAB1G AMIS42671ICAB1RG 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. http://onsemi.com 12 AMIS-42671 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 http://onsemi.com 13 AMIS-42671/D |
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