Data Sheet

6

Rev. 1.11

2016-12-29

TLE8250GVIO

High Speed CAN-Transceiver

Functional Description

4

Functional Description

CAN is a serial bus system that connects microcontrollers, sensor and actuators for real-time control

applications. The usage of the Control Area Network (abbreviated CAN) within road vehicles is described by

the international standard ISO 11898. According to the 7 layer OSI reference model the physical layer of a CAN

bus system specifies the data transmission from one CAN node to all other available CAN nodes inside the

network. The physical layer specification of a CAN bus system includes all electrical and mechanical

specifications of a CAN network. The CAN transceiver is part of the physical layer specification. Several

different physical layer standards of CAN networks have been developed over the last years. The TLE8250GVIO

is a High Speed CAN transceiver without any dedicated Wake-Up function. High Speed CAN Transceivers

without Wake-Up function are defined by the international standard ISO 11898-2.

4.1

High Speed CAN Physical Layer

Figure 3

High Speed CAN Bus Signals and Logic Signals

CAN_H

CAN_L

TxD

=

Logic Power Supply

=

CAN Power Supply

TxD

= Input from the

Microcontroller

RxD

=

Output to the

Microcontroller

CANH =

Voltage on the CANH

Input/Output

CANL = Voltage on the CANL

Input/Output

Differential Voltage

between CANH and CANL

RxD

Dominant

Recessive

t

t

t

t