SYSTEM VOLTAGE REGULATOR WITH FAULT TOLERANT LOW SPEED CAN-TRANSCEIVER
Description
L4969
SYSTEM VOLTAGE REGULATOR WITH FAULT TOLERANT LOW SPEED CAN-TRANSCEIVER
PRELIMINARY DATA
s s s
s
s s s
s s
OPERATING SUPPLY VOLTAGE 6V TO 28V, TRANSIENT UP TO 40V LOW QUIESCENT CURRENT CONSUMPTION, LESS THAN 40µA IN SLEEP MODE TWO VERY LOW DROP VOLTAGE REGULATORS 5V / 200mA AND 5V/200mA SEPARATE VOLTAGE REGULATOR FOR CAN-TRANSCEIVER SUPPLY WITH LOW POWER SLEEP MODE EFFICIENT UC SUPERVISION AND RESET LOGIC 24 BIT SERIAL INTERFACE AN UNPOWERED OR INSUFFICIENTLY SUPPLIED NODE DOES NOT DISTURB THE BUS LINES VS VOLTAGE SENSE COMPARATOR SUPPORTS TRANSMISSION WITH GROUNDSHIFT: SINGLE WIRE: 1.
5V, DIFFERENTIAL: 3V
SO20
PowerSO20
ORDERING NUMBERS: L4969MD (SO20) L4969 (PowerSO20)
DESCRIPTION The L4969 is an integrated circuit containing 3 independent Voltage Regulators and a standard fault tolerant low speed CAN line interface in multipower BCD3S process.
It integrates all main local functions for automotive body electronic applications connected to a CAN bus.
Figure 1.
Block Diagram
VS V1 VREG 1
V2
VREG 2
Watchdog and adjustable RC-Oscillator
NRESET
Identifier Filter V3 VREG 3
WAKE RX TX CANH RTH CANL RTL Fault tolerant low speed CAN-transceiver SCLK 24 Bit SPI SIN SOUT Control and Status Memory NINT
August 2003
This is preliminary information on a new product now in development or undergoing evaluation.
Details are subject to change without notice.
1/35
L4969
Figure 2.
Pin Connection
GND V1 V2 V3 VS CANH RTL CANL RTH GND
GND WAKE NINT NRES
SCLK NRES NINT WAKE GND GND V1 V2 V3 VS
SIN SOUT TX RX
PSO20
SCLK SIN SOUT TXD RXD GND
SO20
GND GND RTH CANL RTL CANH
Table 1.
Pin Functions
Pin No.
(PSO20) 1, 10, 11, 20 2 3 4 5 6 7 8 9 12 13 14 15 16 17 18 19 Pin No.
(SO20) 5,6, 15, 16 7 8 9 10 11 12 13 14 17 18 19 20 1 2 3 4 Pin Name GND V1 V2 V3 VS CANH RTL CANL RTH RXD TXD SOUT SIN SCLK NRES NINT WAKE Power Ground Microcontroller Supply Voltage Peripheral Supply Voltage Internal CAN Supply Power Supply CANH Line Driver Output CANL Termination Source CA...
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