Overview
The TJA1042T/3/1U is a high-speed CAN (Controller Area Network) transceiver designed by NXP USA Inc. for automotive applications. This device provides an interface between a CAN protocol controller and the physical two-wire CAN bus, enabling reliable and efficient data transmission. It is part of the third generation of high-speed CAN transceivers, offering significant improvements in ElectroMagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) performance compared to earlier models.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5.5 | V | ||
| VIO Supply Voltage | 2.8 | 5.5 | V | ||
| Operating Temperature | -40 | 150 | °C (TJ) | ||
| Data Rate | 5 | Mbps | |||
| Receiver Hysteresis | 120 | mV | |||
| Package/Case | 8-SOIC (0.154", 3.90mm Width) | ||||
| Mounting Type | Surface Mount | ||||
| Standby Mode Current | VTXD = VCC - 10 | 15 | μA | ||
| Normal Mode Current (Recessive) | VTXD = VIO | 2.5 | 5 | 10 | mA |
| Normal Mode Current (Dominant) | VTXD = 0 V | 20 | 45 | 70 | mA |
Key Features
- Compliance with SAE J2284-1 to SAE J2284-5 and SAE J1939-14 standards.
- Timing guaranteed for data rates up to 5 Mbit/s in the CAN FD fast phase.
- Suitable for 12 V and 24 V systems.
- Low Electromagnetic Emission (EME) and high Electromagnetic Immunity (EMI) according to proposed EMC Standards IEC 62228-3 and SAE J2962-2.
- Variants with a VIO pin allow for direct interfacing with 3.3 V to 5 V microcontrollers.
- Shorter propagation delay on the TJA1042B and TJA1042C variants supports larger network topologies.
- SPLIT voltage output on TJA1042T and TJA1042CT for stabilizing the recessive bus level.
- Available in SO8 and leadless HVSON8 (3.0 mm × 3.0 mm) packages.
Applications
The TJA1042T/3/1U is primarily designed for automotive applications, including vehicle networks that require high-speed and reliable data transmission. It is suitable for use in various automotive systems such as engine control units, transmission control units, and other CAN-based networks.
Q & A
- What is the primary function of the TJA1042T/3/1U?
The TJA1042T/3/1U is a high-speed CAN transceiver that provides an interface between a CAN protocol controller and the physical two-wire CAN bus.
- What are the operating voltage ranges for VCC and VIO?
The VCC supply voltage ranges from 4.5 V to 5.5 V, and the VIO supply voltage ranges from 2.8 V to 5.5 V.
- What is the maximum data rate supported by the TJA1042T/3/1U?
The TJA1042T/3/1U supports data rates up to 5 Mbps.
- What is the operating temperature range of the TJA1042T/3/1U?
The operating temperature range is from -40°C to 150°C (TJ).
- What package types are available for the TJA1042T/3/1U?
The device is available in SO8 and leadless HVSON8 (3.0 mm × 3.0 mm) packages.
- Is the TJA1042T/3/1U compliant with any specific standards?
Yes, it is compliant with SAE J2284-1 to SAE J2284-5 and SAE J1939-14 standards.
- What are the key improvements over earlier models?
The TJA1042T/3/1U offers improved EMC and ESD performance, shorter propagation delay, and better quiescent current performance.
- Can the TJA1042T/3/1U be used in 12 V and 24 V systems?
Yes, it is suitable for both 12 V and 24 V systems.
- What is the purpose of the SPLIT voltage output on some variants?
The SPLIT voltage output is used to stabilize the recessive bus level.
- How does the TJA1042T/3/1U enhance thermal and electrical performance?
For enhanced thermal and electrical performance, it is recommended that the exposed center pad also be soldered to board ground.
