L4969URTR-E

L4969UR-E L4969URD-E System voltage regulator with fault tolerant low speed CAN transceiver Features Operating supply voltage 6 V to 28 V, transient up to 40 V Low quiescent current consumption, less than 40 A in sleep mode Two very low drop voltage regulators 5V/200mA SO-20 PowerSO-20 Separate voltage regulator for CAN transceiver supply with low power sleep mode Efficient microcontroller supervision and reset Description logic The L4969UR-E and L4969URD-E are integrated 24 bit serial interface circuits containing 3 independent voltage An unpowered or insufficiently supplied node regulators and a standard fault tolerant low speed does not disturb the bus lines CAN line interface in multipower BCD3S process. V voltage sense comparator S They integrate all main local functions for Supports transmission with groundshift: single automotive body electronic applications wire 1.5 V - differential: 3 V connected to a CAN bus. Table 1. Device summary Order codes Package Tube Tape and reel SO-20 L4969URD-E L4969URDTR-E PowerSO-20 L4969UR-E L4969URTR-E December 2011 Doc ID 022587 Rev 1 1/46 www.st.com 1Contents L4969UR-E, L4969URD-E Contents 1 Block diagram and pins description 6 2 Electrical specifications 8 2.1 Absolute maximum ratings . 8 2.2 Thermal data . 8 2.3 Electrical characteristics . 9 3 Functional description 16 3.1 General features 16 3.1.1 V output voltage 16 1 3.1.2 V output voltage 16 2 3.1.3 V output voltage 17 3 3.1.4 Internal supply voltage 17 3.2 Power-up, initialization and sleep mode transitions . 17 3.3 CAN transceiver 18 3.3.1 Negligible errors . 19 3.3.2 Problematic errors . 20 3.3.3 Severe errors . 20 3.3.4 Wakeup via CAN 20 3.4 Oscillator . 21 3.5 Watchdog . 21 3.6 Reset 21 3.6.1 Power-on reset 21 3.6.2 Undervoltage reset 22 3.6.3 Reset signalling during sleepmode 22 3.7 Identifier filter 23 3.8 Ground shift detection . 23 3.9 Thermal protection 24 3.10 Serial Interface (SPI) 24 3.10.1 General dataframe format . 25 3.10.2 Address/command field . 25 3.10.3 Datafield 1 26 3.10.4 Datafield 2/CRC . 26 2/46 Doc ID 022587 Rev 1