Data Sheet

10

Rev. 1.1

2018-10-15

TLE8457C / TLE8457D

LIN Transceiver with integrated voltage regulator

Functional description

4.1.3

Sleep mode

Sleep mode is a low power mode with quiescent current consumption reduced to a minimum while the device

can still wake up by a message from the LIN bus. Both the transceiver and the voltage regulator are switched

off.

4.1.4

Bus wake-up event

A bus wake-up event, also called remote wake-up, causes a transition from a low power mode to standby

wake-up event. The mode change to standby mode becomes active with the following rising edge on the LIN

a state change on the LIN bus from dominant to recessive (see Figure 6). In standby mode a logic “low” signal

on the RxD output indicates a bus wake-up event.

In case the TLE8457C / TLE8457D detects a bus wake-up event while already being in standby mode, the wake-

up event will be signalled with a logic “low” level on RxD and override the previous wake source (see Figure 5).

Figure 6

Bus wake-up behavior

TLE8457CD_BUS_WAKE

Sleep mode

Standby mode

TxD is „high“ because of internal

pull-up structure

RxD „low“ indicates a Bus

Wake-up event

t

RxD

t

TxD

t

EN

t

NRST

t

t