Data Sheet

6

Rev. 1.1, 2014-04-23

TLE7250GVIO

Functional Description

4

Functional Description

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

The use 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 within 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 in recent years. The TLE7250GVIO is a High Speed CAN transceiver

without a dedicated wake-up function. High-speed CAN transceivers without a 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

=

Digital supply

=

High Speed 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