Overview
The UJA1076ATW/5V0/WDJ is a high-speed CAN (Controller Area Network) core system basis chip (SBC) produced by NXP USA Inc. This chip is designed to replace the basic discrete components commonly found in Electronic Control Units (ECUs) with integrated functions, enhancing the efficiency and reliability of networking applications. It supports high-speed CAN networking, which is essential for controlling power and sensor peripherals in various automotive and industrial systems.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | HTSSOP32 plastic thermal enhanced thin shrink small outline package; 32 leads; body width 6.1 mm; lead pitch 0.65 mm; exposed die pad (SOT549-1) |
| Voltage Regulator (V1) | 5 V regulator (extendable with external PNP transistor for increased current capability and dissipation distribution) |
| Voltage Regulator (V2) | Dedicated voltage regulator for on-chip high-speed CAN transceiver; can be switched off and supplied by V1 or an external voltage regulator |
| Watchdog | Advanced independent watchdog with three modes: Window, Timeout, and Off; default watchdog period is 128 ms |
| CAN Transceiver | High-speed CAN transceiver, inter-operable and downward compatible with CAN transceiver TJA1042, and compatible with ISO 11898-2 and ISO 11898-5 standards |
| Interface | Serial Peripheral Interface (SPI) (full duplex); 2 local wake-up input ports; limp-home output port |
| Operating Voltage | Can operate at VBAT voltages down to 4.5 V (e.g., during cranking) in accordance with ISO 7637 pulse 4/4b and ISO 16750-2 |
| Oscillator | On-chip oscillator providing the timing reference for the on-chip watchdog and internal timers, supplied by an internal supply connected to VBAT |
Key Features
- High-speed CAN transceiver compatible with ISO 11898-2 and ISO 11898-5 standards
- Advanced independent watchdog with three modes: Window, Timeout, and Off
- 250 mA voltage regulator (V1) for supplying a microcontroller, extendable with external PNP transistor
- Dedicated voltage regulator (V2) for the on-chip high-speed CAN transceiver
- Serial Peripheral Interface (SPI) (full duplex)
- 2 local wake-up input ports and a limp-home output port
- Undervoltage warning and reset at 90% or 70% of nominal output voltage
- On-chip oscillator for timing reference
Applications
The UJA1076ATW/5V0/WDJ is primarily used in automotive and industrial systems where high-speed CAN networking is essential. It is suitable for Electronic Control Units (ECUs) in vehicles, as well as in various industrial control systems that require reliable and efficient networking capabilities.
Q & A
- What is the primary function of the UJA1076ATW/5V0/WDJ? The primary function is to serve as a high-speed CAN core system basis chip, integrating various ECU functions into a single chip.
- What are the key components integrated into the UJA1076ATW/5V0/WDJ? The chip includes a high-speed CAN transceiver, advanced independent watchdog, voltage regulators, SPI interface, wake-up input ports, and a limp-home output port.
- What are the operating voltage ranges for the UJA1076ATW/5V0/WDJ? It can operate at VBAT voltages down to 4.5 V during cranking, in accordance with ISO 7637 pulse 4/4b and ISO 16750-2.
- What is the purpose of the on-chip oscillator? The on-chip oscillator provides the timing reference for the on-chip watchdog and internal timers.
- What are the watchdog modes available in the UJA1076ATW/5V0/WDJ? The watchdog modes include Window, Timeout, and Off, with a default watchdog period of 128 ms.
- How can the voltage regulator (V1) be extended for increased current capability? The voltage regulator (V1) can be extended with an external PNP transistor for increased current capability and dissipation distribution.
- Is the CAN transceiver compatible with other CAN standards? Yes, the high-speed CAN transceiver is inter-operable and downward compatible with CAN transceiver TJA1042, and compatible with ISO 11898-2 and ISO 11898-5 standards.
- What is the package type of the UJA1076ATW/5V0/WDJ? The package type is HTSSOP32 plastic thermal enhanced thin shrink small outline package (SOT549-1).
- What are the typical applications of the UJA1076ATW/5V0/WDJ? It is used in automotive and industrial systems, particularly in Electronic Control Units (ECUs) and other applications requiring high-speed CAN networking.
- Does the UJA1076ATW/5V0/WDJ have undervoltage protection? Yes, it includes undervoltage warning and reset at 90% or 70% of nominal output voltage.
