The NXP Semiconductors TJA1145T/FDJ is a highly integrated CAN (Controller Area Network) transceiver designed for automotive applications, particularly for use in advanced vehicle communication systems. This device is part of NXP%27s extensive portfolio of automotive-grade components, which are engineered to meet the stringent requirements of modern automotive networks. The TJA1145T/FDJ is notable for its dual CAN transceiver capability, allowing it to support both high-speed and low-speed CAN communication.

## Overview

The TJA1145T/FDJ is designed to facilitate reliable communication between various electronic control units (ECUs) in vehicles. It adheres to the ISO 11898-2 and ISO 11898-3 standards, making it suitable for both high-speed and fault-tolerant CAN networks. The device is optimized for low power consumption, making it ideal for applications where energy efficiency is critical, such as in electric and hybrid vehicles.

## Key Features

1. Dual CAN Transceiver: The TJA1145T integrates two CAN transceivers, enabling simultaneous communication on two separate CAN networks, which is beneficial for complex vehicle architectures.

2. High-Speed and Low-Speed Operation: It supports data rates of up to 1 Mbps for high-speed CAN and operates in a fault-tolerant mode for low-speed CAN applications, providing flexibility in network design.

3. Low Power Consumption: The device features a low quiescent current, which is essential for battery-operated devices and contributes to overall energy efficiency.

4. Integrated Wake-Up Functionality: The TJA1145T can wake up from sleep mode, allowing for energy-saving operation in low-power applications.

5. Bus Fault Protection: The transceiver can withstand short circuits to the battery and ground, enhancing reliability in harsh automotive environments.

6. Thermal Protection: An integrated thermal shutdown feature protects the device from overheating, ensuring safe operation under various conditions.

7. Low Electromagnetic Emission: Designed to minimize electromagnetic interference (EMI), the TJA1145T ensures compliance with automotive standards, which is crucial for maintaining signal integrity.

8. Flexible Package Options: The device is available in various package types, including TSSOP and SOIC, to accommodate different design requirements and PCB layouts.

## Specifications

- Supply Voltage (VCC): 4.5 V to 5.5 V
- Transmitter Output Voltage (VOUT): Typically 2.5 V (at 1 Mbps)
- Receiver Input Voltage (VIO): -0.3 V to 5.5 V
- Data Rate: Up to 1 Mbps for high-speed CAN; supports low-speed CAN operation.
- Quiescent Current (IQ): Typically 10 µA in sleep mode.
- Operating Temperature Range: -40 °C to +125 °C, making it suitable for automotive applications.
- Bus Voltage Levels: Compliant with ISO 11898-2 and ISO 11898-3 standards.
- Propagation Delay: Typically 50 ns.
- Bus Fault Protection: ±58 V.
- Package Type: Available in TSSOP and SOIC packages.

## Applications

The TJA1145T/FDJ is widely used in various automotive applications, including: