SN74AHC1G02QDCKRQ1

Overview

The SN74AHC1G02QDCKRQ1 is an automotive-grade single 2-input positive-NOR gate from Texas Instruments. It operates within a supply voltage range of 2 V to 5.5 V and supports a maximum ICC of 10 µA. The device provides ±8 mA output drive at 5 V and features latch-up performance exceeding 250 mA per JESD 17. It is qualified under AEC-Q100 standards with temperature grade 1, covering -40°C to +125°C. Available in SC-70 (DCK) and SOT-23 (DBV) packages, it includes HBM ESD Level 2 and CDM Level C4B ratings.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for extended temperature operation
• Standard CMOS inputs requiring fast transitions to prevent oscillation and excessive power consumption
• Balanced CMOS push-pull outputs capable of sourcing and sinking similar currents

Applications

• Alarm or tamper detect circuits
• S-R latch configurations

Procurement Notes

Verify the specific package variant required, as the DCK (SC-70) and DBV (SOT-23) options share the same logic function but differ in physical dimensions and thermal characteristics. Confirm that the ordering suffix matches the desired reel quantity and lead finish specifications. Ensure design validation accounts for the recommended bypass capacitor placement near the VCC pin to maintain signal integrity during switching events.

Selection Notes

Select this component when a NOR logic function is required in space-constrained automotive designs. The wide input voltage tolerance allows compatibility with various system logic levels. Designers must ensure unused inputs are terminated to valid logic states to avoid undefined operational conditions. Verify that load capacitance remains within limits to preserve specified propagation delay performance.

Part Context

This device belongs to the SN74AHC1Gxx-Q1 series of single-function automotive logic gates. It utilizes advanced CMOS technology to deliver high-speed performance while maintaining low static power consumption. The Q1 designation indicates compliance with automotive reliability requirements, distinguishing it from standard commercial variants.

Replacement Considerations

SN74AHC1G02DBVRQ1

FAQ

How should unused inputs be handled?

Unused inputs must never be left floating. They should be terminated directly to VCC or ground, or connected via a pull-up/pull-down resistor to prevent oscillation and excessive power consumption.

What is the maximum recommended capacitive load?

The device can drive a load with total capacitance less than or equal to 50 pF while meeting all datasheet specifications. Exceeding this value may degrade performance.