AMIS42670ICAH2RG

AMIS-42670 High-Speed CAN Transceiver for Long Networks Description • • • • • • • • • PIN ASSIGNMENT TxD 1 8 S GND 2 7 CANH VCC 3 6 CANL RxD 4 5 VREF PC20041204.3 (Top View) Features • • • • • http://onsemi.com AMIS− 42670 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. 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 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 See Figure 6 70 245 ns tpd(dom−rec) Propagation Delay TxD to RxD See Figure 6 100 245 ns CM−range Input Common−Mode Range for Comparator Guaranteed Differential Receiver Threshold and Leakage Current −35 +35 V VCM−peak Common−Mode Peak See Figures 7 and 8 (Note 1) −500 500 mV VCM−step Common−Mode Step See Figures 7 and 8 (Note 1) −150 150 mV 1. The parameters VCM−peak and VCM−step guarantee low electromagnetic emission. VCC S 8 3 Thermal Shutdown VCC TxD 7 Driver Control 6 1 CANH CANL AMIS−42670 RxD 4 COMP Ri(cm) Vcc/2 + VREF 5 Ri(cm) 2 PD20070831.4 GND 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 S Silent Mode Control Input; Internal Pulldown Current http://onsemi.com 2 AMIS−42670 Table 3. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Min. Max. Unit −0.3 +7 V 0 < VCC < 5.25 V; no time limit −45 +45 V 0 < VCC < 5.25 V; no time limit −45 +45 V DC Voltage at Pin TxD −0.3 VCC + 0.3 V VRxD DC Voltage at Pin RxD −0.3 VCC + 0.3 V VS DC Voltage at Pin S −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 Vesd Electrostatic Discharge Voltage at All Pins Note 3 Note 5 −4 −750 +4 +750 kV V Latch−up Static Latch−up at All Pins Note 4 100 mA Tstg Storage Temperature −55 +155 °C TA Ambient Temperature −40 +125 °C TJ Maximum Junction Temperature −40 +150 °C VCC Supply Voltage VCANH DC Voltage at Pin CANH VCANL DC Voltage at Pin CANL VTxD 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 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 Parameter Conditions Value Unit Rth(vj−a) Thermal Resistance from Junction−to−Ambient in SOIC−8 Package In Free Air 150 k/W Rth(vj−s) Thermal Resistance from Junction−to−Substrate of Bare Die In Free Air 45 k/W APPLICATION INFORMATION VBAT IN 5V−reg 60 W OUT VCC 47 nF VCC S CAN controller RxD TxD 3 8 4 7 AMIS− 42670 5 6 1 GND Figure 2. Application Diagram http://onsemi.com 3 CANH VREF CAN BUS CANL 60 W 2 PC20070831.3 60 W GND 60 W 47 nF 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 Pin TxD Pin S Pin CANH Pin CANL Bus State Pin RxD 0 0 (or Floating) High Low Dominant 0 4.75 V to 5.25 V 4.75 V to 5.25 V x 1 VCC/2 VCC/2 Recessive 1 4.75 V to 5.25 V 1 (or Floating) X VCC/2 VCC/2 Recessive 1 x X 0 V < CANH < VCC 0 V < CANL < VCC Recessive 1 >2V X 0 V < CANH < VCC 0 V < CANL < VCC Recessive 1 VCC < PORL (Unpowered) PORL < VCC < 4.75 V High−Speed 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. 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. 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. Silent Mode 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. Fail−Safe Features 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. Over−temperature Detection 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 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 Parameter Conditions Min Typ Max Unit Dominant; VTXD = 0V Recessive; VTXD = VCC 25 2 45 4 65 8 mA SUPPLY (Pin VCC) ICC Supply Current 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 −1 0 +1 mA IIL Low−Level Input Current VTxD = 0 V −75 −200 −350 mA Ci Input Capacitance Not Tested − 5 10 pF MODE SELECT (Pin S) VIH High−Level Input Voltage Silent Mode 2.0 − VCC + 0.3 V VIL Low−Level Input Voltage High−Speed Mode −0.3 − +0.8 V IIH High−Level Input Current VS = 2 V 20 30 50 mA IIL Low−Level Input Current VS = 0.8 V 15 30 45 mA 0.6 x VCC 0.75 x VCC RECEIVER DATA OUTPUT (Pin RxD) VOH High−Level Output Voltage IRXD = −10 mA VOL Low−Level Output Voltage IRXD = 6 mA V 0.25 0.45 V 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