TLE8457CSJ datasheet(12/31 Pages) INFINEON

12 / 31 page

Data Sheet

Rev. 1.1

2018-10-15

TLE8457C / TLE8457D

LIN Transceiver with integrated voltage regulator

Functional description

time tRST and then be set logic “high”. As NRST goes “high”, the EN input will become active and the TLE8457C

/ TLE8457D can change operating mode accordingly (see Table 2).

Figure 8

Power-up and power-down behavior

While powering down while in normal operation mode the TLE8457C / TLE8457D will block the LIN transmitter

as the VS supply voltage falls below VS,UV,OFF. The voltage regulator will start tracking the VS supply voltage

when falling below VCC + VDR. As VCC falls below the undervoltage level VCC,UV, the NRST output will be set logic

“low”. When the VS supply voltage falls below the power-on-reset level VS,PON the voltage regulator will be

disabled and the TLE8457C / TLE8457D will be considered unpowered.

TLE8457CD_VS_POWER-UP_DOWN

un-powered

VS,PON

VCC

Standby mode

Normal Operation mode

VCC,UV

un-powered

VS,UV,OFF

VS,PON

Transmission blocked

NRST

tRST

VS,UV,ON

VCC,UV

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