TJA1081
FlexRay node transceiver
Rev. 02 — 28 July 2009
Product data sheet
1. General description
The TJA1081 is a FlexRay node transceiver that is fully compliant with the FlexRay
electrical physical layer specification V2.1 Rev. A (see Ref. 1) and partly complies with
versions V2.1 Rev. B. In addition, the TJA1081 already incorporates features and
parameters anticipated to be included in V3.0, currently being finalized. It is primarily
intended for communication systems from 1 Mbit/s to 10 Mbit/s, and provides an
advanced interface between the protocol controller and the physical bus in a FlexRay
network.
The TJA1081 features enhanced low-power modes, optimized for ECUs that are
permanently connected to the battery.
The TJA1081 provides differential transmit capability to the network and differential
receive capability to the FlexRay controller. It offers excellent EMC performance as well as
high ESD protection.
The TJA1081 actively monitors system performance using dedicated error and status
information (that can be read by any microcontroller), along with internal voltage and
temperature monitoring.
The TJA1081 supports mode control as used in the TJA1080A (see Ref. 2).
2. Features
2.1 Optimized for time triggered communication systems
I Compliant with FlexRay electrical physical layer specification V2.1 Rev. A (see Ref. 1)
I Automotive product qualification in accordance with AEC-Q100
I Data transfer up to 10 Mbit/s
I Support of 60 ns minimum bit time
I Very low ElectroMagnetic Emission (EME) to support unshielded cable
I Differential receiver with wide common-mode range for high ElectroMagnetic Immunity
(EMI)
I Auto I/O level adaptation to host controller supply voltage VIO
I Can be used in 14 V and 42 V powered systems
I Bus guardian interface
I Independent power supply ramp-up for VBAT, VCC and VIO
2.2 Low power management
I Low power management including inhibit switch
I Very low current in Sleep and Standby modes