Overview
The UJA1076ATW/5V0/WD/1,118 is a high-speed CAN (Controller Area Network) core System Basis Chip (SBC) developed by NXP USA Inc. This component integrates several key functions commonly found in Electronic Control Units (ECUs), including a high-speed CAN transceiver, voltage regulators, and an advanced watchdog. It is designed to work in conjunction with a microcontroller that incorporates a CAN controller, ensuring controlled system start-up and stable operation under various conditions.
Key Specifications
| Specification | Description |
|---|---|
| Package | HTSSOP32 (plastic thermal enhanced thin shrink small outline package; 32 leads; body width 6.1 mm; lead pitch 0.65 mm; exposed die pad) |
| Voltage Regulator (V1) | 5 V, scalable, delivering up to 250 mA; extendable with external PNP transistor for increased current capability and dissipation distribution |
| Voltage Regulator (V2) | Dedicated for the on-chip high-speed CAN transceiver; can be switched off and supplied by V1 or an external voltage regulator |
| CAN Transceiver | High-speed, inter-operable and downward compatible with CAN transceiver TJA1042, and compatible with ISO 11898-2 and ISO 11898-5 standards |
| Watchdog | Advanced independent watchdog (in WD versions) |
| Interface | Serial Peripheral Interface (SPI) (full duplex) |
| Wake-Up Inputs | 2 local wake-up input ports |
| Limp-Home Output | Limp-home output port |
| Operating Voltage | VBAT voltages down to 4.5 V (e.g., during cranking), in accordance with ISO 7637 pulse 4/4b and ISO 16750-2 |
Key Features
- Integrates high-speed CAN transceiver, voltage regulators, and watchdog functions in a single package.
- Advanced low-power concept and safe, controlled system start-up behavior.
- Detailed status reporting on system and sub-system levels.
- Undervoltage warning and reset at 90% or 70% of nominal output voltage.
- Stable output under all conditions, including during cranking.
- Supports SPI interface for full duplex communication.
Applications
The UJA1076ATW/5V0/WD/1,118 is primarily used in automotive and industrial applications where high-speed CAN networking is required. It is suitable for Electronic Control Units (ECUs) in vehicles, as well as in other systems that need robust and reliable CAN communication and power management. The component is also useful in applications requiring advanced watchdog and wake-up functionalities.
Q & A
- What is the primary function of the UJA1076ATW/5V0/WD/1,118? The primary function is to integrate high-speed CAN transceiver, voltage regulators, and watchdog functions for use in Electronic Control Units (ECUs).
- What are the voltage regulator options available in this component? The component includes a 5 V voltage regulator (V1) and a dedicated voltage regulator (V2) for the CAN transceiver.
- Is the UJA1076ATW/5V0/WD/1,118 compatible with other CAN transceivers? Yes, it is inter-operable and downward compatible with CAN transceiver TJA1042 and compliant with ISO 11898-2 and ISO 11898-5 standards.
- What is the role of the watchdog in this component? The watchdog ensures advanced independent monitoring and reset capabilities, especially in WD versions.
- How many wake-up input ports does the UJA1076ATW/5V0/WD/1,118 have? It has 2 local wake-up input ports.
- What is the minimum operating voltage for VBAT? The component can operate at VBAT voltages down to 4.5 V during cranking, in accordance with ISO 7637 pulse 4/4b and ISO 16750-2.
- Does the UJA1076ATW/5V0/WD/1,118 support SPI interface? Yes, it supports a full duplex SPI interface.
- What is the purpose of the limp-home output port? The limp-home output port is designed to provide a safe operating mode in case of system failure or malfunction.
- Can the voltage regulators be extended for higher current capability? Yes, the 5 V regulator (V1) can be extended with an external PNP transistor for increased current capability and dissipation distribution.
- What are the key standards this component complies with? It complies with ISO 11898-2, ISO 11898-5, ISO 7637, and ISO 16750-2 standards.
