SN74AHCT02QWBQARQ1

Overview

The SN74AHCT02QWBQARQ1 is an automotive-grade quadruple 2-input positive-NOR gate from Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a temperature range of -40°C to +125°C. The device features TTL-compatible CMOS inputs and balanced push-pull outputs capable of ±8 mA drive current at 5 V. It is housed in a 14-pin WQFN (BQA) package with wettable flanks, ensuring reliable solder joint inspection via automatic optical inspection.

Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD classification levels.
• TTL-compatible CMOS inputs designed to interface directly with TTL logic devices using reduced input voltage thresholds.
• Balanced CMOS push-pull outputs providing symmetric sourcing and sinking capabilities for fast signal edges.
• Wettable flank QFN package design that facilitates side fillet formation and improves reliability during surface-mount assembly.

Applications

• Enabling or disabling digital signals within automotive control systems
• Controlling indicator LEDs in vehicle instrumentation
• Translation between communication modules and system controllers

Procurement Notes

Verify the specific ordering suffix matches the required package type and reel configuration. Confirm AEC-Q100 qualification status aligns with target automotive application requirements. Ensure static handling precautions are observed due to CMOS sensitivity. Review the latest datasheet revision history for any updates to electrical characteristics or thermal metrics before finalizing procurement specifications.

Selection Notes

Select this component when a NOR logic function is required in a 5 V automotive environment. The AHCT series ensures compatibility with existing TTL-based designs without level shifting. Consider the WQFN package for space-constrained PCB layouts requiring high-density mounting. Verify that the load capacitance does not exceed recommended limits to maintain switching performance specifications under all operating conditions.

Part Context

This part belongs to the SN74AHCT02-Q1 family of automotive quadruple 2-input NOR gates. It shares functional similarities with other AHCT series logic devices but is specifically optimized for automotive reliability standards. The BQA package variant distinguishes it from standard QFN packages by incorporating wettable flanks for enhanced solder joint visibility and mechanical stability during thermal cycling.

Replacement Considerations

SN74AHCT02QPWRQ1 offers identical logical functionality in a TSSOP-14 package. Both parts share the same electrical specifications and automotive qualifications. Selection depends primarily on PCB footprint availability and preferred mounting technology rather than performance differences.

FAQ

How should unused inputs be handled?

Unused inputs must be terminated to either VCC or GND to prevent undefined operational states. Floating inputs can cause excessive power consumption and oscillation.

What is the maximum capacitive load supported?

The device can drive a load with total capacitance less than or equal to 50 pF while meeting all data sheet specifications.