Overview
The NXP UJA1078ATW/3V3WD,1 is a Safety System Basis Chip (SBC) designed for automotive applications that require reliable and high-speed communication networks. This chip integrates a high-speed Controller Area Network (CAN) transceiver and two Local Interconnect Network (LIN) transceivers, along with other essential components such as voltage regulators and a watchdog. It is packaged in a compact HTSSOP-32 package, making it ideal for space-constrained designs. The UJA1078ATW/3V3WD,1 offers reduced system complexity, increased reliability, and improved safety, making it a critical component in modern automotive systems.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer Part # | UJA1078ATW/3V3WD,1 |
| Brand | NXP USA Inc. |
| Package/Case | HTSSOP-32 |
| CAN Interface | High-speed CAN transceiver, up to 1 Mbps, compliant with ISO 11898-2 and ISO 11898-5 |
| LIN Interfaces | Dual LIN transceivers, compliant with LIN 2.1, LIN 2.0, and SAE J2602 |
| Voltage Regulator | 3.3 V regulator (V1), extendable with external PNP transistor for increased current capability |
| Watchdog | Advanced independent watchdog with Window and Timeout modes |
| ESD Protection | ±8 kV Human Body Model (HBM) and ±6 kV IEC 61000-4-2 on CAN/LIN bus pins |
| Short-Circuit Proof | ±58 V short-circuit proof CAN/LIN bus pins |
| Operating Voltage | VBAT voltages down to 5.5 V (e.g., during cranking) in accordance with ISO 7637 |
Key Features
- High-speed CAN interface with speeds up to 1 Mbps
- Dual LIN interfaces for robust communication
- Compact HTSSOP-32 package for space-saving designs
- Robust error detection and correction mechanisms
- Low power consumption for extended battery life
- 250 mA voltage regulator for supplying a microcontroller, extendable with external PNP transistor
- Advanced independent watchdog with Window and Timeout modes
- Enhanced ElectroMagnetic Compatibility (EMC) performance
- ±8 kV ESD protection Human Body Model (HBM) and ±6 kV ESD protection IEC 61000-4-2 on CAN/LIN bus pins
Applications
- Automotive infotainment systems
- Advanced driver-assistance systems (ADAS)
- Body control modules (BCM)
- Chassis control modules (CCM)
- Driver information systems
Q & A
- What is the primary function of the UJA1078ATW/3V3WD,1?
The primary function is to provide a high-speed CAN transceiver and dual LIN interfaces, along with integrated voltage regulators and a watchdog, for automotive applications.
- What are the key interfaces supported by this chip?
The chip supports a high-speed CAN interface and two LIN interfaces.
- What is the package type of the UJA1078ATW/3V3WD,1?
The package type is HTSSOP-32.
- What are the voltage regulator capabilities of this chip?
The chip includes a 3.3 V regulator (V1) that can be extended with an external PNP transistor for increased current capability.
- What kind of ESD protection does the UJA1078ATW/3V3WD,1 offer?
The chip offers ±8 kV Human Body Model (HBM) and ±6 kV IEC 61000-4-2 ESD protection on CAN/LIN bus pins.
- What are the typical applications of the UJA1078ATW/3V3WD,1?
Typical applications include automotive infotainment systems, ADAS, body control modules, chassis control modules, and driver information systems.
- How does the watchdog function in the UJA1078ATW/3V3WD,1?
The watchdog has Window and Timeout modes to ensure the microcontroller starts up in a controlled manner.
- What is the operating voltage range for the UJA1078ATW/3V3WD,1 during cranking?
The chip can operate at VBAT voltages down to 5.5 V during cranking, in accordance with ISO 7637.
- Does the UJA1078ATW/3V3WD,1 support any specific automotive standards?
Yes, it supports ISO 11898-2 and ISO 11898-5 for CAN, and LIN 2.1, LIN 2.0, and SAE J2602 for LIN interfaces.
- How does the UJA1078ATW/3V3WD,1 enhance system reliability and safety?
The chip enhances system reliability and safety through robust error detection and correction mechanisms, advanced watchdog functionality, and enhanced EMC performance.
