Data Sheet

7

Rev. 1.0

2016-07-15

TLE8250

High Speed CAN Transceiver

Functional Description

The is a High-Speed CAN transceiver, operating as an interface between the CAN controller and the physical

bus medium. A HS CAN network is a two wire, differential network which allows data transmission rates for

CAN FD frames up to 2 MBit/s. Characteristic for HS CAN networks are the two signal states on the HS CAN bus:

dominant and recessive (see Figure 3).

operate in both directions, as an input and as an output. RxD and TxD pins are the interface to the CAN

controller, the TxD pin is an input pin and the RxD pin is an output pin. The NEN and NRM pins are the input

pins for the mode selection (see Figure 4).

By setting the TxD input pin to logical “low” the transmitter of the drives a dominant signal to the CANH and

CANL pins. Setting TxD input to logical “high” turns off the transmitter and the output voltage on CANH and

CANL discharges towards the recessive level. The recessive output voltage is provided by the bus-biasing (see

Figure 1). The output of the transmitter is considered to be dominant, when the voltage difference between

Parallel to the transmitter the normal-mode receiver monitors the signal on the CANH and CANL pins and

indicates it on the RxD output pin. A dominant signal on the CANH and CANL pins sets the RxD output pin to

logical “low”, vice versa a recessive signal sets the RxD output to logical “high”. The normal-mode receiver

recessive.

To be conform with HS CAN features, like the bit to bit arbitration, the signal on the RxD output has to follow