TLE6251-3G Datasheet, PDF (7/36 Pages) Infineon Technologies AG – High Speed CAN-Transceiver with Wake and Failure Detection

TLE6251-3G
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 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
TxD
V_IO
CAN_H
CAN_L
V_DIFF
RxD
t
V_CC
t
V_IO =
V_CC =
TxD =
RxD =
CANH =
CANL =
V_DIFF =
Logic Supply
Transceiver Supply
Input from the
Microcontroller
Output to the
Microcontroller
Voltage on CANH
Input/Output
Voltage on CANL
Input/Output
Differential Voltage
V_DIFF = V_CANH – V_CANL
Dominant
Recessive
t
V_DIFF = ISO Level Dominant
V_DIFF = ISO Level Recessive
V_IO
t
Figure 3 High Speed CAN Bus Signals and Logic Signals
Data Sheet
7
Rev. 1.1, 2011-06-06