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The TJA1049T is a high-speed CAN transceiver that provides an interface between the CAN protocol controller and the physical two-wire CAN bus. This transceiver is specifically designed for high-speed CAN applications in the automotive industry, enabling the CAN protocol controller (in the microcontroller) to transmit and receive differential signals.

The TJA1049T is the third-generation high-speed CAN transceiver introduced by NXP, offering significant performance improvements compared to first- and second-generation devices such as the TJA1040.

TJA1049T Features

High-speed CAN communication

Compliant with ISO 11898-2:2003 and ISO 11898-5:2007 standards, supporting CAN FD (Flexible Data Rate) with a maximum data transfer rate of 5 Mbps.

Low electromagnetic emission (EME) and high electromagnetic immunity (EMI) for optimised automotive electronics stability.

Low Power Management  

Standby Mode: Extremely low static current, supports bus wake-up and host wake-up, suitable for battery-powered systems.  

Automatically disconnects from the bus when power is off to prevent abnormal power consumption.

Wide voltage compatibility: 4.75V to 5.25V power supply, with some models (e.g., TJA1049T/3) supporting direct connection to 3V to 5V microcontrollers.  

High reliability protection mechanisms  

High ESD protection on bus pins (±8kV HBM).  

TXD dominant timeout protection to prevent bus lockup.

Undervoltage detection (UVLO) and over-temperature protection (OTP).  

Automotive-grade certification: AEC-Q100 certified, operating temperature -40°C to +150°C, suitable for harsh environments.

TJA1049T Technical Specifications

Protocol: CAN / CAN FD  

Data rate: 40 kbps to 5 Mbps  

Supply voltage: 4.75 V to 5.25 V (typical 5 V)  

Standby current: extremely low  

ESD protection (bus pins): ±8 kV (HBM)  

Package: SO8  

Operating temperature: -40°C to +150°C

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