AMIS-42670

AMIS-42670 High-Speed CAN Transceiver for Long Networks Description The AMIS−42670 CAN transceiver is the interface between a controller area network (CAN) protocol controller and the physical bus and 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−42670 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−42670 is the industrial version of the AMIS−30660 and 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−42670 allows low transmit data rates down 10 kbit/s or lower. Features http://onsemi.com PIN ASSIGNMENT TxD GND VCC RxD 1 2 3 4 8 7 6 5 S CANH CANL VREF (Top View) AMIS− 42670 PC20041204.3 • • • • • • • • • • • • • • Fully Compatible with the ISO 11898−2 Standard Certified “Authentication on CAN Transceiver Conformance (d1.1)” Wide Range of Bus Communication Speed (0 Mbit/s 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 Unpowered 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 These are Pb−Free Devices* ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 9 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−42670/D AMIS−42670 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 < 5.25 V; no time limit 0 < VCC < 5.25 V; no time limit 42.5 W < RLT < 60 W See Figure 6 See Figure 6 Guaranteed Differential Receiver Threshold and Leakage Current See Figures 7 and 8 (Note 1) See Figures 7 and 8 (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. VCC S 8 VCC 3 Thermal Shutdown TxD Driver Control 1 7 6 CANH CANL AMIS−42670 RxD VREF 4 COMP Ri(cm) + Vcc/2 5 Ri(cm) 2 PD20070831.4 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 S 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) Silent Mode Control Input; Internal Pulldown Current http://onsemi.com 2 AMIS−42670 Table 3. ABSOLUTE MAXIMUM RATINGS Symbol VCC VCANH VCANL VTxD VRxD VS 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 S 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 5 Note 4 −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 −750 Max. +7 +45 +45 VCC + 0.3 VCC + 0.3 VCC + 0.3 VCC + 0.3 +150 +150 +4 +750 100 +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 SOIC−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 APPLICATION INFORMATION VBAT IN 5V− reg OUT VCC S 3 8 4 1 2 7 60 W VCC CANH VREF CANL 60 W GND 60 W 47 nF CAN controller RxD TxD AMIS− 42670 5 6 CAN BUS 60 W 47 nF PC20070831.3 GND Figure 2. Application Diagram http://onsemi.com 3 AMIS−42670 FUNCTIONAL DESCRIPTION Operating Modes The behavior of AMIS−42670 under various conditions is illustrated in Table 3 below. In case the device is powered, one of two operating modes can be selected through Pin S. Table 5. FUNCTIONAL TABLE OF AMIS−42670; x = don’t care VCC 4.75 V to 5.25 V 4.75 V to 5.25 V 4.75 V to 5.25 V VCC < PORL (Unpowered) PORL < VCC < 4.75 V Pin TxD 0 x 1 (or Floating) x >2V Pin S 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 0 V < CANL < VCC 0 V < CANL < VCC Bus State Dominant Recessive Recessive Recessive Recessive Pin RxD 0 1 1 1 1 High−Speed Mode If Pin S 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. Silent Mode 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. High Communication Speed Range In silent mode, the transmitter is disabled. All other IC functions continue to operate. The silent mode is selected by connecting Pin S to VCC and can be used to prevent network communication from being blocked, due to a CAN controller which is out of control. Over−temperature Detection 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 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 A current−limiting circuit protects the transmitter output stage from damage caused by an 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). Pin TxD is pulled high internally should the input become disconnected. http://onsemi.com 4 AMIS−42670 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 = −40°C to +150°C; 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 = 0 V 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 S) High−Level Input Voltage Low−Level Input Voltage High−Level Input Current Low−Level Input Current Silent 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 < VCANH < +35 V; −35 V < VCANL < +35 V 0.50 x VCC 0.50 x VCC 0.55 x VCC 0.60 x VCC V V 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) VTxD = VCC; No Load VTxD = VCC; No Load −35 V < VCANH < +35 V; 0 V < VCC < 5.25 V −35 V