NXP Semiconductors TJA1421/TJA1425 Single & Quad LIN Transceivers
NXP Semiconductors TJA1421/TJA1425 Single and Quad LIN Transceivers provide physical-layer interfaces for LIN-based automotive and industrial subnetworks while supporting direct connection to modern 1.8V, 3.3V, and 5V microcontrollers. Both devices are compliant with LIN 2.x, SAE J2602, and ISO 17987-4:2016 for 12V LIN systems, and both emphasize low-power standby or sleep behavior with wake-up support for energy-conscious node designs.
The NXP TJA1421 is the single-channel option for commander or responder interfacing, with tighter responder termination to support larger LIN responder networks and backward compatibility to the TJA1021. NXP Semiconductors TJA1425 is the quad-channel option, integrating four LIN commander channels and commander termination in one package to reduce BOM and PCB area in multi-channel LIN systems, while also adding 1.8V VIO and low-power wake-up flexibility.
The transceivers are ideal for body and vehicle control, HVAC, eCockpit, zonal controllers, electric pumps, energy management, and building control systems. The TJA1421 is available in SO8 and HVSON8 packages, while TJA1425 is offered in a leadless DHVQFN24 package sized 3.5mm x 5.5mm for dense multi-channel designs.
Features
- Common LIN interface and system features
- Compliant with LIN 2.x, SAE J2602, and ISO 17987-4:2016 for 12V LIN networks
- Direct interface support for 1.8V, 3.3V, and 5V microcontrollers
- MCU time-out feature to help minimize power consumption
- K-line compatibility
- Optimized EMC and ESD performance to current IEC and SAE expectations
- TJA1421
- Single LIN transceiver for commander or responder interfacing
- Integrated and tighter termination resistor for LIN responder applications
- Wake-up source recognition for local or remote wake requests
- INH function and wake input support
- Pin-to-pin compatibility with TJA1021
- TJA1425
- Four LIN commander channels in one package
- Integrated LIN commander termination with a diode and a pull-up resistor on each channel
- Very low low-power-mode current with wake-up via SLP/SLP_N or LIN pins
- Option to control an external voltage regulator through INHN
- Pin-to-pin compatibility with TJA1124
Applications
- Automotive body and vehicle control
- HVAC systems
- eCockpit systems
- Electric pumps
- Zonal controllers
- Energy management and distribution
- Security and building control systems
- Home and industrial automation
Specifications
- Shared operating capability
- Baud rate up to 20kBd for LIN operation
- TJA1421
- Single LIN channel
- Supply voltage range 5.4V to 40V
- Package options
- SO8
- HVSON8, 3.0mm x 3.0mm
- Supports more than 15 LIN responder nodes in one network through tighter responder termination
- TJA1425
- Quad LIN commander transceiver with four channels
- Low-power wake-up through SLP, SLP_N, or LIN1 to LIN4, depending on mode and configuration
- DHVQFN24 package, 3.5mm x 5.5mm
- Designed to reduce BOM, PCB area, and peripheral count in multi-channel LIN systems
TJA1421 Block Diagram
TJA1425 Block Diagram
