company blog about NXP TJA1145T High Speed CAN Transceiver For Partial Networking

NXP TJA1145T High Speed CAN Transceiver For Partial Networking

Shenzhen Mingjiada Electronics Co., Ltd., as a globally renowned authorised distributor of electronic components, supplies NXP's TJA1145T high-speed CAN transceiver, providing an ideal solution for local area networking applications.

【TJA1145T Product Overview】

The TJA1145T is a high-speed CAN transceiver specifically optimised for automotive local area networking applications. It interfaces between the CAN protocol controller and the physical two-wire CAN bus, supporting standard CAN 2.0 and CAN FD protocols with data transfer rates up to 2 Mbit/s.

One of the TJA1145T's most notable features is its exceptionally low power consumption – reduced to minimal levels in standby and sleep modes. This makes it highly suitable for nodes that are perpetually connected to battery power yet subject to stringent power constraints.

The TJA1145T variant incorporates a dedicated feature termed ‘FD-Passive’. This enables the device to ignore CAN FD frames whilst awaiting a valid wake-up frame during sleep/standby mode.

This provides an ideal solution for networks supporting both CAN FD and standard CAN 2.0 communication.

During CAN FD communication, the TJA1145T permits standard CAN controllers not transmitting CAN FD messages to remain in local network sleep/standby mode without generating bus errors.

The TJA1145T further incorporates advanced power management, supporting local wake-up via the WAKE pin and remote wake-up via the CAN bus.

Its VIO input permits direct connection to microcontrollers operating at 3.3V to 5V, whilst the SPI interface facilitates transceiver control and status information retrieval.

【TJA1145T Outstanding Performance】

Low-Power Design

The TJA1145T exhibits exceptionally low power consumption in both standby and sleep modes, with sleep mode current below 1μA and standby mode around 10μA.

This characteristic makes it particularly suitable for automotive electronic nodes permanently connected to battery power sources requiring minimal power consumption.

High-Speed Data Transmission

The TJA1145T supports the CAN FD (Flexible Data Rate) protocol, achieving data transfer rates up to 2 Mbit/s.

It implements the CAN physical layer defined by the ISO 11898 standard, ensuring reliable communication even during CAN FD fast phases.

Robust Protection Features

The TJA1145T offers exceptional immunity and protection capabilities, with CAN bus pins featuring ±8 kV HBM ESD protection and ±6 kV IEC 61000-4-2 ESD protection.

It also provides ±58 V short-circuit protection and transient protection on battery and CAN bus pins, compliant with ISO 7637-3.

Flexible Networking Capabilities

The TJA1145T supports local networking functionality compliant with ISO 11898-6:2013.

Its ‘FD-Passive’ feature ignores CAN FD frames whilst awaiting valid wake-up frames in sleep/standby mode, preventing erroneous wake-ups.

【TJA1145T Application Scenarios】

The TJA1145T excels in local networking applications within automotive electronic systems. Its selective wake-up capability enables intelligent activation of specific network nodes, significantly reducing overall system power consumption.

Automotive Electronic Networks

Within automotive electronics, the TJA1145T supports high-speed data communication for critical components such as Engine Control Units (ECUs), Body Control Modules (BCMs), and Advanced Driver Assistance Systems (ADAS).

It effectively underpins infotainment systems, Battery Management Systems (BMS), and Vehicle-to-Everything (V2X) communications, enabling real-time data exchange between vehicles and infrastructure, as well as between vehicles themselves.

Industrial Automation

Within industrial automation, the TJA1145T is suitable for scenarios requiring high-speed, reliable communication, such as industrial robots, smart factory equipment, and energy management systems.

Its local networking capability enables nodes within distributed control systems to activate only when required, substantially reducing overall system power consumption.

New Energy Vehicles

The TJA1145T plays a particularly vital role within battery management systems and motor control systems in new energy vehicles.

It ensures the high-speed, reliable transmission of critical data while alleviating the burden on vehicle batteries through its low-power design, thereby contributing to extended driving range.