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TJA1080A
General description
The TJA1080A 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 TJA1080A can be configured to be used as an active star transceiver or as a node transceiver.
The TJA1080A 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 TJA1080A actively monitors the system performance using dedicated error and status information (readable by any microcontroller), as well as internal voltage and temperature monitoring.
The TJA1080A supports the mode control as used in NXP Semiconductors TJA1054 (see Ref. 2) and TJA1041 (see Ref. 3) CAN transceivers.
The TJA1080A is the next step up from the TJA1080 FlexRay transceiver (Ref. 4). Being fully pin compatible and offering the same excellent ESD protection, the TJA1080A also features:
- Improved power-on reset concept
- Improved ElectroMagnetic Emission (EME)
- Support of 70 ns minimum bit time
- Improved bus error detection functionality
This makes the TJA1080A an excellent choice in any kind of FlexRay nodes.
See Section 14 for a detailed overview of differences between the TJA1080 and the TJA1080A.
Features
Optimized for time triggered communication systems
- Compliant with FlexRay electrical physical layer specification V2.1 Rev. A (see Ref. 1)
- Automotive product qualification in accordance with AEC-Q100
- Data transfer up to 10 Mbit/s
- Support of 70 ns minimum bit time
- Very low EME to support unshielded cable
- Differential receiver with high common-mode range for ElectroMagnetic Immunity (EMI)
- Auto I/O level adaptation to host controller supply voltage VIO
- Usable for 14 V and 42 V powered systems
- Bus guardian interface included
- Independent power supply ramp-up for VBAT, VCC and VIO
- Transceiver can be used for linear passive bus topologies as well as active star topologies
Low power management
- Low power management including two inhibit switches
- Very low current in Sleep and Standby mode
- Wake-up via wake-up symbol or dedicated FlexRay data frames 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
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
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
Functional classes according to FlexRay electrical physical layer specification (see Ref. 1)
- Bus driver voltage regulator control
- Bus driver - bus guardian control interface
- Bus driver logic level adaption
- Active star - communication controller interface
- Active star - bus guardian interface
- Active star voltage regulator control
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| TJA1080ATS/1 | 9352 835 85112 | Samples available | SOT339-1
(SSOP20) | Tube | Standard Marking | TJA1080ATS/1
| ||
| TJA1080ATS/1 | 9352 835 85118 | Samples available | SOT339-1
(SSOP20) | Reel Pack, SMD, 13" | Standard Marking | TJA1080ATS/1
|
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| TJA1080ATS/1 | 9352 835 85112 | not available | ||||||
| TJA1080ATS/1 | 9352 835 85118 | not available |
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