Data Sheet

13

Rev. 1.0

2016-07-15

TLE8251V

High Speed CAN Transceiver with Bus Wake-up

Functional Description

4.4

Remote Wake-up

The TLE8251VSJ has a remote wake-up feature, also called bus wake-up feature. In both stand-by mode and

forced stand-by mode, the low-power receiver monitors the activity on the CAN bus and in case it detects a

wake-up signal, the TLE8251VSJ indicates the wake-up signal on the RxD output pin.

While entering stand-by mode, the RxD output pin is set to logical “high”, regardless of the signal on the CAN

bus. The low-power receiver of the TLE8251VSJ requires a signal change from recessive to dominant on the

CAN bus before the RxD output is enabled to follow the signals on the HS CAN bus.

detecting a wake-up signal (see Figure 8).

Note:

A wake-up event on the CAN bus is only indicated on the RxD output, no automatic change of the

operating mode is applied. To enter normal-operating mode, the external microcontroller needs to

change the signal on the STB pin.

the HS CAN bus (see also Figure 4).

Figure 8

Wake-up pattern

RxD

t

t

STB

1.15V

1.15 V

t

0.4V

0.4 V