74HC109D,652

Overview

The Nexperia 74HC109D,652 is a dual positive-edge-triggered J-K flip-flop in the 74HC series. It features individual J and K inputs, clock (CP) inputs, asynchronous active LOW set (SD) and reset (RD) inputs, and complementary Q and Q outputs. The device operates on a wide supply voltage range of 2.0 V to 6.0 V. Inputs include clamp diodes for interfacing with voltages exceeding VCC. The clock input incorporates Schmitt-trigger action for tolerance to slow rise and fall times.

Feature Summary

• Dual positive-edge-triggered J-K flip-flops with independent control
• Asynchronous active LOW set and reset inputs operating independently of the clock
• Schmitt-trigger action on the clock input for improved noise immunity
• Input clamp diodes enabling interface to voltages exceeding VCC

Applications

• General-purpose digital logic circuits requiring state storage
• Counters and shift registers utilizing J-K toggle functionality
• Systems requiring asynchronous preset and clear operations
• Interfaces between CMOS logic and TTL levels via HCT-compatible design principles

Procurement Notes

Verify the specific suffix '652' against the manufacturer's current datasheet to confirm package type and RoHS compliance status. Ensure the ordering part number matches the required tape and reel or tube configuration. Cross-reference the component marking code with official Nexperia identification guides to prevent counterfeit substitution during assembly.

Selection Notes

Select this component when dual independent flip-flops are required within a single package. The 74HC series offers low power dissipation and high noise immunity suitable for general applications. Consider the 74HCT variant if direct interfacing with standard TTL logic levels is necessary without additional level shifting circuitry.

Part Context

This component belongs to the Nexperia 74HC family of high-speed CMOS logic devices. It provides dual J-K flip-flop functionality compatible with standard digital design practices. The device is manufactured using advanced CMOS technology to ensure low static power consumption while maintaining high switching speeds typical of the HC series.

Replacement Considerations

Compatible substitutes include other 74HC109 variants from different manufacturers that meet JEDEC standards. Verify pin compatibility and electrical characteristics such as propagation delay and supply voltage range before substitution.