The TJA1080 is a FlexRay transceiver, which is in line with the FlexRay electrical physical layer specification V2.1 Rev. A (see Ref. 1). 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 TJA1080 can be configured to be used as an active star transceiver or as a node transceiver.
Features
2.1 Optimized for time triggered communication systems
■ Data transfer up to 10 Mbit/s
■ Usable for 14 V and 42 V powered systems
■ Very low ElectroMagnetic Emission (EME) to support unshielded cable
■ Differential receiver with high common-mode range for ElectroMagnetic Immunity (EMI)
■ Transceiver can be used for linear passive bus topologies as well as active star topologies
■ Auto I/O level adaptation to host controller supply voltage VIO
■ Bus guardian interface included
■ Automotive product qualification in accordance with AEC-Q100
2.2 Low power management
■ Low power management including two inhibit switches
■ Very low current in Sleep and Standby mode
■ Wake-up via wake-up symbol on the bus lines (remote), negative edge on pin WAKE (local), and a positive edge on pin STBN if VIO is present
■ Wake-up source recognition
■ Automatic power-down (in Star-sleep mode) in star configuration
2.3 Diagnosis (detection and signalling)
■ Overtemperature detection
■ Short-circuit on bus lines
■ VBAT power-on flag (first battery connection and cold start)
■ Pin TXEN and pin BGE clamping
■ Undervoltage detection on pins VBAT, VCC and VIO
■ Wake source indication
2.4 Protections
■ Bus pins protected against 8 kV HBM ESD pulses
■ Bus pins protected against transients in automotive environment (ISO 7637 class C compliant)
■ Bus pins short-circuit proof to battery voltage (14 V and 42 V) and ground
■ Fail-safe mode in case of an undervoltage on pins VBAT, VCC or VIO
■ Passive behavior of bus lines in the event that transceiver is not powered
