TJA1446CHG/0J

Drivers, Receivers, Transceivers Overview

The TJA1446CHG/0J is a high-speed CAN transceiver designed for automotive applications, compliant with ISO 11898-2:2024 and SAE J2284 standards. It supports CAN FD up to 5 Mbit/s and CAN SIC up to 8 Mbit/s. The device features partial networking via selective wake-up, ASIL B compliance per ISO 26262, and an SPI interface for configuration. It includes two configurable GPIO pins, a Q&A watchdog, and dedicated reset/failsafe pins. Supply voltages include VBAT (4.75–40 V), VCC (4.5–5.5 V), and VIO (1.71–5.5 V). It operates in Normal, Standby, Sleep, and ListenOnly modes within a -40°C to +150°C junction temperature range.

Drivers, Receivers, Transceivers Feature Summary

• Implements partial networking through selective wake-up functionality to minimize system power consumption.
• Provides advanced system monitoring including undervoltage detection, overtemperature diagnosis, and a question & answer watchdog.
• Features configurable general-purpose I/O pins and direct transmitter on/off control inputs.
• Ensures predictable fail-safe behavior with autonomous bus biasing and defined responses to supply voltage drops.

Drivers, Receivers, Transceivers Applications

• Automotive networks requiring ISO 26262 ASIL B compliance
• High-speed CAN and CAN FD communication systems
• Low-power vehicle architectures utilizing partial networking

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix '0J' against official documentation to confirm tape-and-reel packaging details or specific variant characteristics. Ensure compatibility with the required VIO level (3.3V for the CHG variant) and confirm that the DHVQFN18 package dimensions meet the target PCB layout constraints.

Drivers, Receivers, Transceivers Selection Notes

Select this component when ASIL B functional safety certification is mandatory. Choose the CHG variant specifically for microcontrollers operating at a 3.3 V logic level. Consider the integrated SPI interface if software-configurable diagnostic features and mode control are required for the application design.

Drivers, Receivers, Transceivers Part Context

This part belongs to the TJA1446 family of high-speed CAN transceivers. The 'C' designation indicates support for a 5 V VIO supply range, while the 'H' denotes the DHVQFN18 plastic thermal enhanced package. It serves as a robust physical layer interface for modern automotive controllers demanding low standby currents and advanced network management capabilities.

Drivers, Receivers, Transceivers Replacement Considerations

TJA1446AHG/0J

Drivers, Receivers, Transceivers FAQ

What is the maximum data rate supported by the TJA1446?

The TJA1446 supports data rates up to 5 Mbit/s for CAN FD and up to 8 Mbit/s for CAN SIC.

How does the TJA1446 achieve low power consumption?

It utilizes partial networking capabilities, allowing nodes to enter deep Sleep or Standby modes while remaining responsive to specific wake-up patterns or frames, thereby powering down unnecessary circuitry.

Is the TJA1446 compatible with classical CAN protocols?

Yes, it is fully interoperable with high-speed classical CAN and CAN FD transceivers as defined in ISO 11898-2:2024.