Microchip Technology ATA664151-WNQW-1

Overview

ATA664151-WNQW-1 from Microchip Technology (formerly Atmel) is an automotive-grade LIN System Basis Chip integrating a LIN 2.1/SAE J2602-2 transceiver, 5V/80mA low-drop regulator, adjustable window watchdog, and eight-channel high-voltage switch interface with current sources. It supports master/slave LIN operation up to 200 kbit/s, operates from 5V–27V supply, and enables contact monitoring, battery sensing, and wake-up via LIN or CL15 in vehicle convenience electronics.

For engineers reviewing the ATA664151-WNQW-1 datasheet, ATA664151-WNQW-1 pinout, ATA664151-WNQW-1 application, or ATA664151-WNQW-1 equivalent, key selection considerations include HV switch configuration (CS1–CS8), SPI-based diagnostics, VDIV-based watchdog enable/disable at power-up, and thermal/short-circuit protection on LIN and CS pins - all validated for OEM-compliant LIN nodes per Hardware Requirements for LIN in Automotive Applications Rev. 1.3.

Technical Context

The ATA664151-WNQW-1 implements a LIN physical layer compliant with LIN 2.1 and SAE J2602-2, featuring slope-controlled driver output enabling reliable communication up to 200 kbit/s in high-speed mode (LSME bit disabled). Its 16-bit SPI interface supports daisy-chaining for multi-node configuration and real-time diagnosis of switch states, voltage divider outputs, and interrupt sources.

Internally, it integrates a linear 5V regulator (80mA max, ±2% tolerance), a window watchdog with external resistor-adjustable timing via WDOSC/NTRIG, and an 8-channel HV interface where CS1–CS3 support bidirectional current sink/source while CS4–CS8 are sourcing-only. All HV pins include overtemperature and short-circuit protection versus GND and battery.

Key Specifications

Pinout & Package

Package: QFN32 (5 mm × 5 mm, 0.5 mm pitch), thermally enhanced with backside GND slug.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LIN system basis chip applications.

Compared with TLIN1029-Q1 and MC33816, the ATA664151-WNQW-1 uniquely combines 8 HV channels, on-die battery sensing, and LIN 2.1+J2602-2 compliance in a single QFN32 package - making it optimal for cost-sensitive, space-constrained LIN slave nodes requiring comprehensive system integration.

Availability

ATA664151-WNQW-1 is available at Aetrix Electronics and suitable for body control modules, seat memory systems, roof modules, and liftgate actuation requiring stable component supply across automotive production lifecycles.

Supply support for ATA664151-WNQW-1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a global semiconductor company delivering microcontrollers, analog devices, FPGAs, and automotive-qualified ICs with ISO/TS 16949-certified manufacturing.

The ATA664151-WNQW-1 belongs to Microchip's LIN System Basis Chip product line, designed specifically for automotive convenience electronics requiring integrated power, communication, protection, and HV interface in a single device.

FAQ

What LIN protocol versions does the ATA664151-WNQW-1 support?

The ATA664151-WNQW-1 implements a LIN physical layer compliant with LIN 2.1 and SAE J2602-2 specifications. It is backward-compatible with earlier LIN physical layers (LIN 1.x, 2.0) and supports both master and slave operation. The device does not implement the LIN protocol stack itself - that resides in the connected microcontroller - but provides the complete PHY, regulation, and supervision functions required for robust node-level implementation of any LIN version.

How is the watchdog timer configured on the ATA664151-WNQW-1?

The ATA664151-WNQW-1 features an adjustable window watchdog whose timing is set by an external resistor connected between WDOSC and GND (34 kΩ to 120 kΩ). The NTRIG pin accepts a falling-edge trigger from the MCU to refresh the watchdog. During power-up, the watchdog can be disabled by holding VDIV high until NRES releases - a feature useful for MCU programming or debugging sessions where continuous watchdog servicing is impractical.

Can the ATA664151-WNQW-1 monitor battery voltage without external components?

Yes. The ATA664151-WNQW-1 includes an internal 1:4 voltage divider connected to the VBATT pin, delivering a scaled, ±2% accurate analog signal to the VDIV pin. This allows direct connection to a microcontroller ADC for battery monitoring without external resistors or capacitors - significantly reducing BOM count and PCB area in automotive LIN nodes.

What protection features are implemented on the CSx pins of the ATA664151-WNQW-1?

All eight CSx pins (CS1–CS8) of the ATA664151-WNQW-1 feature overtemperature shutdown and short-circuit protection versus both GND and battery (VBATT). Each pin also includes a high-voltage comparator for digital switch monitoring and a voltage divider path for analog sensing. Unused CSx pins should be tied to VS to ensure defined bias and avoid leakage-induced current draw.

Does the ATA664151-WNQW-1 support daisy-chained SPI configuration?

Yes. The ATA664151-WNQW-1 supports daisy-chained SPI communication using its 16-bit serial interface. Multiple devices can be connected in series (MISO of one to MOSI of next) with shared SCK and NCS lines, enabling centralized configuration and diagnostics across multiple LIN nodes - ideal for distributed automotive subsystems like door modules or lighting controllers.