Data Sheet

13

Rev. 1.0

2016-08-05

TLE8457

LIN Transceiver with integrated Voltage Regulator

Functional Description

4.2.2

Figure 9

• In Normal Operation Mode the TLE8457 blocks the communication between the LIN bus and the

microcontroller when detecting an early undervoltage event. The RxD output will be set “high”. However,

communication interface will be released when the signal on the TxD input goes “high”. See Figure 9.

Figure 10. In Init Mode the TLE8457 indicates a power-up event on the RxD pin. The power-on reset

detection is active in all operation modes.

Figure 10

TLE8457_VS_EARLY_UNDERVOLTAGE_A

Power-on reset level

Normal Operation mode

Normal Operation mode

Blanking time

No communication possible

Undervoltage release level

Undervoltage hysteresis

Undervoltage blocking level

t

TLE8457_VS_UNDERVOLTAGE_A

Power-down

Normal Operation mode

Init mode (EN = “low“)

Normal Operation mode (EN = “high“)

Undervoltage hysteresis

No communication possible

t

Undervoltage blocking level

Power-on reset level

Blanking time

Undervoltage release level