Overview
The UJA1075ATW/5V0/WD,1 from NXP USA Inc. is a high-speed CAN/LIN core system basis chip (SBC) designed specifically for automotive applications. This integrated circuit combines the functionality of a high-speed Controller Area Network (CAN) transceiver, a Local Interconnect Network (LIN) transceiver, voltage regulators, and a watchdog in a single chip. It is engineered to replace the basic discrete components commonly found in Electronic Control Units (ECUs), enhancing system reliability and efficiency.
Key Specifications
| Parameter | 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 | 5 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 |
Key Features
- Combines high-speed CAN and LIN transceivers in a single chip, enhancing system integration and reducing component count
- Includes two voltage regulators: a 5 V regulator and an optional external PNP transistor for increased current capability
- Advanced independent watchdog for enhanced system reliability
- Wake-up by bus activity, cyclic wake-up, and external switches, with periodic control signal for pulsed testing of wake-up switches
- Exposed die pad for better heat dissipation via the printed-circuit board
Applications
The UJA1075ATW/5V0/WD,1 is primarily designed for automotive Electronic Control Units (ECUs) and other automotive networking applications. It is used to control power and sensor peripherals using high-speed CAN as the main network interface and LIN as a local sub-bus. This chip is suitable for various automotive systems requiring reliable and efficient communication and power management
Q & A
- What is the primary function of the UJA1075ATW/5V0/WD,1? 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 in a single chip.
- What package type does the UJA1075ATW/5V0/WD,1 use? It uses a HTSSOP32 package: plastic thermal enhanced thin shrink small outline package with 32 leads and a body width of 6.1 mm.
- What are the key components integrated into the UJA1075ATW/5V0/WD,1? The key components include a high-speed CAN transceiver, a LIN transceiver, two voltage regulators, and an advanced independent watchdog.
- What standards does the CAN transceiver comply with? The CAN transceiver is inter-operable and downward compatible with CAN transceiver TJA1042 and complies with ISO 11898-2 and ISO 11898-5 standards.
- What is the purpose of the exposed die pad in the package? The exposed die pad allows for better heat dissipation from the SBC via the printed-circuit board.
- How does the UJA1075ATW/5V0/WD,1 handle wake-up functions? It supports wake-up by bus activity, cyclic wake-up, and the activation of external switches, along with a periodic control signal for pulsed testing of wake-up switches.
- What is the minimum operating voltage for the UJA1075ATW/5V0/WD,1? It can operate at VBAT voltages down to 5.5 V, in accordance with ISO 7637, pulse 4.
- What are the typical applications of the UJA1075ATW/5V0/WD,1? It is used in automotive Electronic Control Units (ECUs) and other automotive networking applications requiring reliable communication and power management.
- How does the voltage regulator in the UJA1075ATW/5V0/WD,1 work? The chip includes a 5 V regulator that can be extended with an external PNP transistor for increased current capability and dissipation distribution.
- What is the significance of the LIN transceiver in the UJA1075ATW/5V0/WD,1? The LIN transceiver is compliant with LIN 2.1, LIN 2.0, and SAE J2602, and compatible with LIN 1.3, serving as a local sub-bus in automotive networking applications.
