Data Sheet

10

Rev. 1.0

2016-08-05

TLE8457

LIN Transceiver with integrated Voltage Regulator

Functional Description

4.1.4

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 on the LIN bus. Both the transceiver and the voltage regulator are switched off.

4.1.5

Bus Wake-up event

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

event. The mode change to Init Mode becomes active with the following rising edge on the LIN bus, when bus

from dominant to recessive (see Figure 6). In Init Mode a logical “low” signal on the RxD output indicates a bus

wake-up event.

In case the TLE8457 detects a bus wake-up event while already being in Init, the wake-up event will be

signalled with a logical “low” level on RxD and override the previous wake source (see Figure 5).

Figure 6

Bus wake-up behavior

TLE8457_BUS_WAKE

Sleep mode

Init 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