Overview
The UJA1075ATW/3V3/WDJ, produced by NXP USA Inc., is a high-speed CAN/LIN core system basis chip (SBC) designed primarily for automotive applications. This integrated chip replaces the basic discrete components commonly found in Electronic Control Units (ECUs) with a comprehensive set of functions. It includes a high-speed Controller Area Network (CAN) transceiver and a Local Interconnect Network (LIN) interface, making it ideal for networking applications that control power and sensor peripherals.
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 | 3.3 V regulator (V1); extendable with external PNP transistor for increased current capability and dissipation distribution |
| 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 |
| LIN Transceiver | LIN transceiver compliant with LIN 2.1, LIN 2.0, and SAE J2602, and compatible with LIN 1.3 |
| Watchdog | Advanced independent watchdog (UJA1075A/xx/WD versions) |
| Operating Voltage | Can operate at VBAT voltages down to 5.5 V (e.g., during cranking) in accordance with ISO 7637, pulse 4 |
| Environmental Compliance | PbFree, EU RoHS compliant, Halogen Free, and compliant with REACH SVHC |
Key Features
- Combines high-speed CAN and LIN transceivers in a single chip, enhancing system reliability and reducing component count.
- Includes two voltage regulators (3.3 V and optional external extension for higher current).
- Advanced independent watchdog for system monitoring and control.
- Wake-up by bus activity, cyclic wake-up, and external switches, along with periodic control signals for pulsed testing of wake-up switches.
- Stable output under all conditions, including during cranking and low battery voltages.
- Exposed die pad for better heat dissipation via the printed-circuit board.
Applications
The UJA1075ATW/3V3/WDJ is primarily used in automotive Electronic Control Units (ECUs) for various applications, including:
- Networking and communication within vehicles using high-speed CAN and LIN interfaces.
- Control of power and sensor peripherals.
- Advanced system reliability and monitoring through integrated watchdog and voltage regulators.
- Automotive systems requiring robust and reliable communication and power management.
Q & A
- What is the primary function of the UJA1075ATW/3V3/WDJ? The primary function is to serve as a high-speed CAN/LIN core system basis chip for automotive applications, integrating CAN and LIN transceivers, voltage regulators, and a watchdog.
- What types of voltage regulators are included in the UJA1075ATW/3V3/WDJ? The chip includes a 3.3 V regulator, which can be extended with an external PNP transistor for increased current capability.
- Is the UJA1075ATW/3V3/WDJ compliant with automotive standards? Yes, it is compliant with ISO 11898-2, ISO 11898-5, LIN 2.1, LIN 2.0, and SAE J2602 standards.
- What is the role of the watchdog in the UJA1075ATW/3V3/WDJ? The watchdog provides advanced system monitoring and control, ensuring system reliability.
- How does the UJA1075ATW/3V3/WDJ handle low battery voltages? It can operate at VBAT voltages down to 5.5 V during cranking, in accordance with ISO 7637, pulse 4.
- What is the package type of the UJA1075ATW/3V3/WDJ? The package is HTSSOP32, a plastic thermal enhanced thin shrink small outline package with 32 leads.
- Is the UJA1075ATW/3V3/WDJ environmentally compliant? Yes, it is PbFree, EU RoHS compliant, Halogen Free, and compliant with REACH SVHC.
- How does the UJA1075ATW/3V3/WDJ enhance system reliability? It combines multiple functions in a single chip, reduces component count, and includes features like watchdog and stable output under all conditions.
- What wake-up mechanisms are supported by the UJA1075ATW/3V3/WDJ? It supports wake-up by bus activity, cyclic wake-up, and external switches, along with periodic control signals for pulsed testing of wake-up switches.
- How does the exposed die pad contribute to the UJA1075ATW/3V3/WDJ? The exposed die pad allows for better heat dissipation from the SBC via the printed-circuit board.
