Datasheet

13

Rev. 1.20

2022-04-27

TLE7258

LIN transceiver

Functional description

3.6

Mode transition via EN input

Figure 9

Entering normal operation mode from sleep mode

The EN input is used for operation mode control of the TLE7258. By setting the EN input logical “high” for the

time tMODE while being sleep or standby mode, a transition to normal operation mode will be triggered (see

Figure 9). The EN input has an integrated pull-down resistor to ensure the device remains in sleep or standby

mode even if the EN pin is left open. The EN input has an integrated hysteresis.

A signal transition from logical “high” to “low” on the EN input changes the operation mode from normal

operation mode to sleep mode (see Figure 5).

The TLE7258 changes the operation modes regardless of the signal on the BUS pin. In the case of a short circuit

between the LIN bus and GND, resulting in a permanent “dominant” signal, the TLE7258 can be set to sleep

mode by setting the EN input to logical “low”.

After a mode change to normal operation mode, a logical “high” signal for the time tto,rec on the TxD input is

required to release the data communication.

INH: „high impedance“

INH: „high impedance“

TLE7258_ENABLE

1) The TxD signal is driven from the external microcontroller

V

EN,OFF

Sleep mode

t

to,rec

V

EN,ON

Hysteresis

Normal Operation mode

Sleep mode

t

EN

t

Data transmission

RxD

t

Data transmission

TxD

1)

t

INH

t

MODE

t

MODE