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Data Sheet
FlexRay node transceiver
FlexRay™ Node Transceiver - Clamp 30
TJA1081G Receive alerts
The TJA1081G FlexRay™ node transceiver is compliant with the FlexRay Electrical Physical Layer specification ISO 17458-4:2013. The TJA1081G is a Clamp 30 transceiver, optimized for applications that are permanently connection to the car battery. It is primarily intended for communication systems operating at between 2.5 Mbit/s and 10 Mbit/s and provides an advanced interface between the protocol controller and the physical bus in a FlexRay network.
- Offers an optimized solution for electronic control unit (ECU) applications that are permanently connected to the battery.
- Provides a differential transmit capability to the network and a differential receive capability to the FlexRay controller. It offers excellent electromagnetic compatibility (EMC) performance as well as high electrostatic discharge (ESD) protection.
Product Details
Features
Optimized for time-triggered communication systems
- Compliant with ISO 17458-4:2013 (see Ref. 2)
- Automotive product qualification in accordance with AEC-Q100
- Data transfer rates from 2.5 Mbit/s to 10 Mbit/s
- Supports 60 ns minimum bit time at 400 mV differential input voltage
- Very low ElectroMagnetic Emission (EME) to support unshielded cable, meeting the latest industry standards
- Differential receiver with high common-mode range for excellent ElectroMagnetic Immunity (EMI), meeting the latest industry standards
- Auto I/O level adaptation to host controller supply voltage VIO
- Can be used in 14 V, 24 V and 48 V powered systems
- Instant transmitter shut-down interface (BGE pin)
Low-power management
- Very low current consumption in Standby mode
- Remote wake-up via a wake-up pattern or dedicated FlexRay data frames on the bus lines
Diagnosis and robustness
- Enhanced supply voltage monitoring for VCC and VIO
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Two error diagnosis modes:
- Status register readout via the Serial Peripheral Interface (SPI)
- Simple error indication via pin ERRN
- Overtemperature detection
- Short-circuit detection on bus lines
- Power-on flag
- Clamping diagnosis for pins TXEN and BGE
- Bus pins protected against ±6 kV ESD pulses according to IEC61000-4-2 and ±8 kV according to HBM
- Bus pins protected against transients in automotive environment (according to ISO 7637 class C)
- Bus pins short-circuit proof to battery voltage (14 V, 24 V and 48 V) and ground
- Maximum differential voltage between pins BP or BM and any other pin of 60 V
- Bus lines remain passive when the transceiver is not powered
- No reverse currents from the digital input pins to VIO or VCC when the transceiver is not powered
Functional classes according to FlexRay Electrical Physical Layer specification V 3.0.1
- Bus driver - bus guardian control interface
- Bus driver - logic level adaptation
- Bus driver - remote wake-up