ATA664151-WNQW-1

Specialized Overview

The ATA664151-WNQW-1 is a LIN System Basis Chip from Microchip Technology, integrating an eight-channel high-voltage switch interface, a LIN transceiver compliant with LIN 2.1 and SAE J2602-2, a low-drop voltage regulator, and an adjustable window watchdog. It supports supply voltages up to 40V, with an operating range of 5V to 27V on the VS pin. The internal 5V regulator provides up to 80mA current capability. The device features a 16-bit serial SPI interface for configuration and diagnosis, enabling both master and slave operation. It includes wake-up capabilities via the LIN bus or CL15 pin, with typical sleep mode current consumption of 8µA.

Specialized Feature Summary

• Integrates an eight-channel high-voltage switch interface with configurable current sources and sinks for contact monitoring and load control.
• Provides a LIN physical layer compliant with LIN 2.1 and SAE J2602-2 specifications, supporting data rates up to 200kBit/s in high-speed mode.
• Includes a linear low-drop voltage regulator capable of delivering up to 80mA at 5V, protected against overloads and overtemperature conditions.
• Features an adjustable window watchdog timer and VCC undervoltage detection, combined into an open-drain reset output.

Specialized Applications

• LIN bus slave nodes in automotive convenience electronics
• Master nodes for electronic control unit (ECU) programming or data download
• Switch applications requiring constant current sourcing or contact monitoring

Specialized Procurement Notes

Verify the specific ordering suffix -WNQW-1 against the manufacturer's latest documentation to confirm package type and temperature grade. Ensure compatibility with the QFN32 5x5mm footprint during PCB layout. Confirm that the design accounts for the required external components for the watchdog oscillator and reference current adjustment as specified in the datasheet.

Specialized Selection Notes

Select this component when a single-chip solution for LIN networking and power management is required. It is suitable for applications needing multiple high-voltage outputs with current sensing capabilities. Consider the 80mA regulator limit and the 40V absolute maximum rating when designing the power supply network. Verify that the microcontroller supports the 16-bit SPI interface for proper configuration.

Specialized Part Context

The ATA664151 belongs to the Atmel LIN System Basis Chip family, designed specifically for automotive LIN bus applications. It consolidates functions typically found in separate transceivers, regulators, and switch drivers. This integration reduces board space and simplifies system architecture for nodes handling low data-rate communication in vehicles.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Microchip Technology for cross-reference information regarding newer revisions or alternative devices within the LIN System Basis Chip portfolio.