CD74ACT109ME4

Overview

The CD74ACT109ME4 is a dual J-K flip-flop from Texas Instruments' ACT logic series, housed in a 16-pin SOIC surface-mount package. It features positive-edge triggering with independent set and reset inputs. The device operates within a supply voltage range of 4.5 V to 5.5 V, supporting TTL input levels and CMOS outputs. Key electrical parameters include a maximum propagation delay of 12.5 ns at 5 V with 50 pF load, and output currents of ±24 mA. It functions reliably across an industrial temperature range of -55 °C to +125 °C.

Feature Summary

• Dual independent J-K flip-flops with positive-edge clock triggering
• Integrated asynchronous preset and clear control inputs
• Compatible TTL input thresholds with high-drive CMOS outputs
• Industrial-grade thermal stability for harsh environments

Applications

• Parallel data storage and shift register configurations
• Frequency division and counter circuits
• State machine implementation in digital systems
• Timing control and synchronization modules

Procurement Notes

Verify the specific ME4 suffix against the manufacturer's current datasheet to confirm pinout compatibility and material composition. Ensure the component status is active, as some variants may be scheduled for obsolescence. Cross-reference the package dimensions and thermal characteristics with your PCB layout requirements before finalizing procurement decisions.

Selection Notes

Select this component when dual J-K functionality with positive-edge triggering is required in a compact surface-mount form factor. The ACT series offers a balance of speed and drive capability suitable for mid-frequency digital applications. Consider the 16-pin SOIC package constraints and ensure adequate thermal management for operation near the upper temperature limit.

Part Context

Part of the Texas Instruments CD74ACT family, designed for high-speed CMOS logic applications. The ACT series bridges the performance gap between standard 74HC and 74AC families, providing faster switching speeds while maintaining low power consumption. This specific variant focuses on sequential logic elements rather than combinational gates.

Replacement Considerations

CD74ACT109M: Direct equivalent without environmental suffix. CD74ACT112M: Similar dual J-K flip-flop but utilizes negative-edge triggering instead of positive-edge.