ATA664151-WNQW

Specialized Overview

The ATA664151-WNQW 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 programming interface (SPI) for configuration and diagnosis, supporting daisy-chaining. It enables both LIN master and slave operations, with data rates up to 200kBit/s in high-speed mode. Typical supply current is 8µA in sleep mode and 35µA in active low-power mode.

Specialized Feature Summary

• Integrates an eight-channel high-voltage switch interface with configurable current sources and sinks for contact monitoring and load control.
• Includes a LIN physical layer compliant with LIN 2.1 specification, supporting both master and slave node configurations.
• Features an internal 5V linear low-drop voltage regulator capable of supplying up to 80mA to external loads.
• Provides advanced power management with distinct sleep and active low-power modes to minimize current consumption.

Specialized Applications

• LIN bus system nodes for automotive convenience electronics
• Switch applications requiring high-voltage I/O and constant current sourcing
• Electronic control units (ECUs) needing integrated power regulation and communication

Specialized Procurement Notes

Verify the specific ordering suffix -WNQW against the manufacturer's official documentation to confirm package type and temperature grade. Ensure compatibility with your PCB layout requirements for the QFN32 5x5mm package. Confirm that the design accounts for the thermal performance of the backside heat slug connected to GND.

Specialized Selection Notes

Select this component when a combined solution for LIN communication, power regulation, and high-voltage switching is required. It is suitable for applications needing minimal external components while maintaining compliance with automotive standards. Consider the 8-channel HV interface if multiple switches or sensors need direct connection without additional drivers.

Specialized Part Context

This part belongs to the Atmel ATA664151 family of LIN System Basis Chips. It is designed specifically for automotive applications, offering a compact integration of essential functions for LIN nodes. The device simplifies board design by combining the transceiver, regulator, and switch interface into a single QFN32 package.

Specialized Replacement Considerations

Consult Microchip Technology's official cross-reference documents for verified substitute part numbers. Do not assume functional equivalence with other LIN transceivers due to the unique integration of the 8-channel HV switch interface and specific watchdog configurations.

Specialized FAQ

How does the ATA664151 handle wake-up from sleep mode?

The device can be woken up via the LIN bus through a pre-wake detection sequence or locally via the CL15 pin upon detecting a positive edge voltage above the threshold.

What is the function of the VDIV pin?

The VDIV pin serves as an output for the internal voltage divider measuring VBATT, providing a scaled-down voltage for ADC input. During startup, it also acts as an input to configure the watchdog disable bit.

Can the ATA664151 operate as a LIN master?

Yes, the datasheet confirms that both LIN master and slave operations are possible using this chip.