L9669

L9669 FAULT TOLERANT CAN TRANSCEIVER s s s s s s s s s FAULT TOLERANT DIFFERENTIAL CAN TRANSCEIVER OPERATING SUPPLY VOLTAGE 6V TO 28V, TRANSIENTS UP TO 40V LOW QUIESCENT CURRENT IN STANDBY MODE (100µA) AND SLEEP MODE (37µA) ON CHIP DIAGNOSIS FOR ERRORS ON THE PHYSICAL BUSLINES WITH MICRO CONTROLLER INTERFACE OPTIMIZED EMI BEHAVIOUR DUE TO LIMITED AND SYMMETRIC SLOPES OF CAN SIGNALS AUTOMATIC SWITCHING TO SINGLE WIRE MODE UPON BUS FAILURES TWO-EDGE SENSITIVE WAKE-UP PIN SUPPORTS TRANSMISSION WITH GROUND SHIFT VOLTAGES: SINGLE WIRE: 1.5V DIFFERENTIAL WIRE: 3v AN UNPOWERED NODE OR UNSUFFICIENT SO14 ORDERING NUMBER: L9669 SUPPLIES DO NOT DISTURB THE BUS LINES DESCRIPTION The L9669 is an integrated circuit which contains a CAN physical line interface. It integrates all main local functions for automotive body electronic applications connected to a CAN bus. Figure 1. Block Diagram KL30 (+12V) Voltage +5V Regulator VS 14 INH 1 VCC 10 5Vint 75k WAKE 7 VCC 12.5k Wake-up Control CANH Driver TXD Control CANH Driver Filter 11 CANH 12 CANL CAN BUSLINE TXD 2 R RTH 3 R RTL Receiver RXD CANH Termination NSTB EN 5 6 Low Power Control 100k 8 RTH 9 RTL 4 Error Management & Diagnosis CANL Termination NERR 100k 13 GND 99AT0001 July 2003 1/13 L9669 Figure 2. Pin Connection top view. INH TXD RXD NERR NSTB EN WAKE 99AT0002 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VS GND CANL CANH VCC RTL RTH Table 1. Pin Functions N° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin INH TXD RXD NERR NSTB EN WAKE RTH RTL VCC CANH CANL GND VS Function Inhibit Output - for switching external 5V Regulator Transmit Data Input - active LOW dominant Bit transmission Receive Data Output - active LOW dominant Bit reception Error/Diagnostic Output - active LOW error/Wake-up and Diagnostic output Not Standby Input - Digital control signal for low power modes Enable Input/Diagnostic Clock Digital control signal for low power modes/Diagnostic clock Wake-Up Input - If level of VWAKE changes the device initiates a wake-up from sleep mode by switching INH to VS Termination Resistor for CANH - controlled by internal error management Termination Resistor for CANL - controlled by internal error management Supply Voltage Input - +5V High Voltage Bus Line - High: dominant state Low Voltage Bus Line - Low: dominant state Ground Battery Voltage Input - +12V Table 2. Thermal Data Symbol Rthj-amb Parameter Thermal resistance junction to ambient Value 120 Unit °C/W 2/13 L9669 Table 3. Absolute Maximum Ratings For externally applied voltages or currents exceeding these limits damage of the circuit may occur! Symbol VS-DC VS-P VCC VCANH,L-DC VX VWAKE TSTG Tj Parameter DC operating battery voltage Pulse operating battery voltage (t