Overview
The TJA1055T, produced by NXP USA Inc., is an enhanced fault-tolerant CAN (Controller Area Network) transceiver. It serves as the interface between the CAN protocol controller and the physical bus wires in a CAN network. This device is primarily intended for low-speed applications, supporting data rates up to 125 kBd, and is particularly suited for use in passenger cars. The TJA1055T offers robust features to ensure reliable and fault-tolerant communication in automotive environments.
Key Specifications
| Specification | Details |
|---|---|
| Data Rate | Up to 125 kBd |
| Number of Nodes | Up to 32 nodes |
| Bus Wires | Supports unshielded bus wires |
| Electromagnetic Emission (EME) | Very low EME due to built-in slope control function |
| Electromagnetic Immunity (EMI) | Very high EMI in normal and low power modes |
| Receiver Filters | Fully integrated receiver filters |
| Transmit Data (TxD) Dominant Time-out | Transmit Data (TxD) dominant time-out function |
| ESD Protection | ±8 kV Human Body Model (HBM) and ±6 kV IEC 61000-4-2 for off-board pins |
| Low Power Modes | Low current sleep mode and standby mode with wake-up via the bus lines |
| Bus Failure Management | Automatic switching to single-wire mode in the event of bus failures |
| Thermal Protection | Thermally protected |
Key Features
- Differential transmit and receive capability with the ability to switch to single-wire transmitter and/or receiver in error conditions.
- Very low Electromagnetic Emission (EME) and very high Electromagnetic Immunity (EMI) in normal and low power modes.
- Fully integrated receiver filters and Transmit Data (TxD) dominant time-out function.
- High ESD robustness with ±8 kV Human Body Model (HBM) and ±6 kV IEC 61000-4-2 protection for off-board pins.
- Support for low power modes including low current sleep mode and standby mode with wake-up via the bus lines.
- Automatic bus failure management, including automatic switching to single-wire mode and automatic reset to differential mode if the bus failure is removed.
- Thermally protected and bus pins short-circuit safe to battery and ground.
Applications
The TJA1055T is primarily used in automotive applications, particularly in passenger cars, for low-speed CAN communication. It is suitable for various in-vehicle networks where reliable and fault-tolerant communication is crucial. This includes applications such as vehicle control systems, driver assistance systems, and other automotive electronic control units (ECUs) that require robust CAN communication.
Q & A
- What is the primary application of the TJA1055T CAN transceiver?
The TJA1055T is primarily intended for low-speed applications in passenger cars, particularly for in-vehicle networks. - What is the maximum data rate supported by the TJA1055T?
The TJA1055T supports data rates up to 125 kBd. - How many nodes can be connected using the TJA1055T?
Up to 32 nodes can be connected. - What type of bus wires does the TJA1055T support?
The TJA1055T supports unshielded bus wires. - What are the ESD protection levels for the TJA1055T?
The device offers ±8 kV Human Body Model (HBM) and ±6 kV IEC 61000-4-2 protection for off-board pins. - Does the TJA1055T support low power modes?
Yes, it supports low current sleep mode and standby mode with wake-up via the bus lines. - How does the TJA1055T handle bus failures?
The device automatically switches to single-wire mode in the event of bus failures and resets to differential mode if the failure is removed. - Is the TJA1055T thermally protected?
Yes, the device is thermally protected. - What kind of receiver filters does the TJA1055T have?
The TJA1055T has fully integrated receiver filters. - Does the TJA1055T have any specific protection against transients?
Yes, the bus lines are protected against transients in an automotive environment.
