Datasheet

TLE6251-3G
Functional Description
Data Sheet 7 Rev. 1.1, 2011-06-06
4 Functional Description
CAN is a serial bus system that connects microcontrollers, sensor and actuators for real-time control applications.
The usage of the C
ontrol 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 TLE6251-3G is a High Speed CAN transceiver
with dedicated Wake-Up functions. High Speed CAN Transceivers with Wake-Up functions are defined by the
international standard ISO 11898-5.
4.1 High Speed CAN Physical Layer
Figure 3 High Speed CAN Bus Signals and Logic Signals
V
CC
CAN_H
CAN_L
TxD
V
IO
= Logic Supply
V
CC
= Transceiver Supply
TxD = Input from the
Microcontroller
RxD = Output to the
Microcontroller
CANH = Voltage on CANH
Input/Output
CANL = Voltage on CANL
Input/Output
V
DIFF
= Differential Voltage
V
DIFF
= V
CANH
– V
CANL
RxD
V
DIFF
Dominant
Recessive
V
IO
V
IO
t
t
t
t
V
DIFF
= ISO Level Dominant
V
DIFF
= ISO Level Recessive