CD74ACT109E

Overview

The CD74ACT109E is a dual JK-type flip-flop manufactured by Harris Corporation, belonging to the 74ACT logic series. It features two independent circuits per package, each handling one bit of data with positive edge triggering. The device supports complementary outputs and includes set (preset) and reset functions. It operates within a supply voltage range of 4.5V to 5.5V and is housed in a 16-pin DIP package with a width of 0.300 inches (7.62mm).

Feature Summary

• Dual JK-type flip-flop configuration with positive edge triggering for precise timing control.
• Complementary output type providing both true and inverted signal states simultaneously.
• Integrated set (preset) and reset functions for direct asynchronous state management.

Applications

• Digital counting systems requiring dual-stage binary storage.
• Shift register architectures utilizing JK-type logic elements.
• Timing circuit designs needing preset and reset capabilities.

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm the specific lot code and manufacturing date against current inventory records. Ensure the package matches the 16-DIP specification with 0.300-inch width. Check for RoHS compliance status as historical Harris products may vary. Validate that the part number corresponds exactly to the ACT series variant rather than HCT or other logic families.

Selection Notes

Select this component when dual independent JK flip-flops are required in a single package. The ACT series offers faster switching speeds compared to standard TTL equivalents. Ensure the design accommodates the 4.5V to 5.5V supply voltage range. Verify that the 16-pin DIP footprint fits the target PCB layout constraints. Consider the complementary output requirement if both polarities are needed for downstream logic gates.

Part Context

This component belongs to the Harris Corporation 74ACT family of high-speed CMOS logic devices. The 74ACT series bridges the performance gap between standard TTL and advanced CMOS technologies. It maintains TTL-compatible input levels while offering CMOS noise immunity and lower power consumption. The CD74 prefix indicates commercial temperature range availability within the broader CD series lineup.

Replacement Considerations

Direct substitutes include Texas Instruments SN74ACT109N or equivalent industry-standard 74ACT109 variants. Verify pin compatibility and electrical characteristics before substitution. Ensure the replacement supports the same 16-pin DIP package and dual JK functionality. Confirm operating temperature ranges match application requirements.