CD74HCT109E

Overview

The CD74HCT109E is a dual J-K flip-flop manufactured by Texas Instruments, belonging to the HCT logic series. It features two independent circuits in a 16-pin PDIP package. The device operates on a single-ended input with differential output and supports both inverting and non-inverting polarities. Key electrical parameters include a propagation delay of 40 ns, high-level output current of -4 mA, and low-level output current of 4 mA. It functions within a supply voltage range of 4.5 V to 5.5 V.

Feature Summary

• Dual J-K flip-flop configuration for sequential logic applications
• High-speed CMOS technology compatible with TTL inputs
• Differential output capability for signal integrity

Applications

• Digital counting circuits
• Shift register implementations
• State machine design

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific packaging variants such as tube quantities against official datasheets. Ensure storage conditions adhere to moisture sensitivity level requirements to maintain device reliability prior to assembly.

Selection Notes

Select this component when dual J-K functionality is required with HCT speed characteristics. Consider the 16-pin PDIP form factor for through-hole mounting constraints. Evaluate the 40 ns propagation delay against system timing budgets. Verify that the 4.5 V to 5.5 V operating range aligns with the target power supply infrastructure.

Part Context

This part belongs to the Texas Instruments 74HCT family of high-speed CMOS logic devices. It provides standard J-K flip-flop functionality optimized for compatibility with 5 V TTL systems. The HCT series ensures fast switching speeds while maintaining low power consumption relative to older bipolar technologies.

Replacement Considerations

• CD74HCT109NE