Sleep mode is the lowest power mode of the TLIN1021-Q1 and is only entered from normal mode when the EN pin transitions from high to low for t > t_{MODE_CHANGE}. In sleep mode, the LIN driver and receiver are switched off, the LIN bus is weakly pulled up, an the transceiver cannot send or receive data. The INH pin is switched to a floating output in sleep mode causing any system power elements controlled by the INH pin to be switched off thus reducing the system power consumption. While the device is in sleep mode, the following conditions exist:

• The LIN bus driver is disabled and the internal LIN bus termination is switched off to minimize power loss if LIN is short circuited to ground.
• A weak current pull-up is active to prevent false wake-up events in case an external connection to the LIN bus is lost.
• The normal receiver is disabled.
• EN input, WAKE pin and LIN wake-up receiver are active.

The TLIN1021-Q1 supports three methods for wake-up from sleep mode:

• Wake-up over the LIN bus via the LIN wake-up receiver.
• Local wake-up via the WAKE pin.
• Local wake-up via the EN pin. The EN pin must be set high for t > t_NOMINT in order for the device to wake-up.