74HCT109DB,118

Overview

The 74HCT109DB,118 is a dual positive-edge-triggered J-K flip-flop manufactured by Nexperia USA Inc. in the 74HCT logic 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 within a supply voltage range of 4.5V to 5.5V and supports an operating temperature range of -40°C to +125°C. It is housed in a 16-SSOP package with a width of 5.30mm.

Feature Summary

• Dual positive-edge-triggered J-K flip-flops with independent clock control
• Asynchronous active-low set and reset inputs for immediate state control
• TTL-compatible input levels allowing direct interfacing with standard logic families
• Complementary Q and Q outputs for versatile digital circuit integration

Applications

• Parallel-to-serial data conversion circuits
• Frequency division and counting applications
• State machine implementation in digital systems
• Shift register construction for data storage

Procurement Notes

Verify the specific suffix '118' against the manufacturer's official documentation to confirm pinout compatibility and packaging specifications. Confirm that the 16-SSOP form factor matches your PCB footprint requirements. Ensure the supply voltage constraints align with your system design before procurement.

Selection Notes

Select this component when dual edge-triggered storage elements are required with TTL-level input compatibility. Consider the wide operating temperature range for industrial environments. Evaluate the asynchronous set and reset functionality against synchronous-only alternatives for faster response needs.

Part Context

This part belongs to the 74HCT family, designed for high-speed CMOS operation with TTL-compatible inputs. It serves as a fundamental building block for sequential logic circuits. The DB variant indicates the SSOP surface-mount package, suitable for automated assembly processes in compact electronic designs.

Replacement Considerations

The 74HCT109PW,118 is listed as a similar alternative from Nexperia. Verify package differences between SSOP and TSSOP if substituting.