Overview
The TJA1055T/3/1 is an Enhanced Fault-Tolerant CAN (Controller Area Network) transceiver produced by NXP USA Inc. This device serves as the interface between the CAN protocol controller and the physical bus wires, making it a crucial component in various automotive, industrial, and medical applications. It is designed to support low-speed CAN applications up to 125 kBd, particularly in passenger cars. The TJA1055T/3/1 offers robust features such as differential transmit and receive capabilities, low electromagnetic emission (EME), and high electromagnetic immunity (EMI), ensuring reliable communication in harsh environments.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Data Rate | Up to 125 kBd | Maximum data rate supported |
| Package Type | SO14 (SOT108-1) | Plastic small outline package; 14 leads; body width 3.9 mm |
| Bus Lines | CANH and CANL | Differential bus lines for CAN communication |
| ESD Protection | ±8 kV (HBM), ±6 kV (IEC 61000-4-2) | Electrostatic discharge protection for off-board pins |
| Power Modes | Normal, Standby, Sleep | Low current modes with wake-up capability via bus lines |
| Wake-Up Capability | Local wake-up via pin WAKE | Wake-up signal detected by rising or falling edge |
| Bus Failure Management | Automatic switching to single-wire mode | Supports single-wire transmission with ground offset up to 1.5 V |
Key Features
- Differential Transmit and Receive Capability: Provides differential transmit capability to the CAN bus and differential receive capability to the CAN controller.
- Low Electromagnetic Emission (EME): Built-in slope control function reduces EME, allowing the use of unshielded bus wires.
- High Electromagnetic Immunity (EMI): Ensures high EMI in normal operating and low power modes.
- Bus Failure Management: Automatically switches to single-wire mode in the event of bus failures, even with CANH bus wire short-circuited to VCC.
- Wake-Up Capability: Full wake-up capability during failure modes, with local wake-up via pin WAKE.
- ESD Protection: High ESD robustness with ±8 kV (HBM) and ±6 kV (IEC 61000-4-2) protection for off-board pins.
- Thermal and Short-Circuit Protections: Bus pins are short-circuit safe to battery and ground, and thermally protected.
Applications
- Automotive Systems: Primarily intended for low-speed applications in passenger cars.
- Industrial Control: Suitable for industrial control applications requiring robust CAN communication.
- Medical Devices: Used in medical devices that require reliable and fault-tolerant CAN communication.
Q & A
- What is the primary application of the TJA1055T/3/1?
The TJA1055T/3/1 is primarily intended for low-speed CAN applications in passenger cars.
- What is the maximum data rate supported by the TJA1055T/3/1?
The device supports data rates up to 125 kBd.
- What type of package does the TJA1055T/3/1 come in?
The TJA1055T/3/1 comes in a SO14 (SOT108-1) package.
- What are the key features of the TJA1055T/3/1 in terms of EME and EMI?
The device has built-in slope control to reduce EME and ensures high EMI in normal and low power modes.
- How does the TJA1055T/3/1 manage bus failures?
The device automatically switches to single-wire mode in the event of bus failures, even if the CANH bus wire is short-circuited to VCC.
- What kind of wake-up capability does the TJA1055T/3/1 have?
The device has full wake-up capability during failure modes, with local wake-up via the WAKE pin.
- What level of ESD protection does the TJA1055T/3/1 offer?
The device offers ±8 kV (HBM) and ±6 kV (IEC 61000-4-2) ESD protection for off-board pins.
- Is the TJA1055T/3/1 thermally protected?
Yes, the device is thermally protected and bus pins are short-circuit safe to battery and ground.
- What are some of the other applications of the TJA1055T/3/1 besides automotive?
Besides automotive, it is used in industrial control applications and medical devices.
- How does the TJA1055T/3/1 support low power modes?
The device supports low current sleep and standby modes with wake-up via the bus lines.
