74ACT109PC

Overview

The onsemi 74ACT109PC is a dual JK flip-flop integrated circuit housed in a 16-pin PDIP package. It operates within a supply voltage range of 4.5V to 5.5V, featuring low static current consumption of 4 µA maximum. The device provides high drive capability with output source and sink currents of 24 mA each. Propagation delay is specified at 11 ns when tested at 5V with a 50 pF load. It supports an operating temperature range from -40°C to +85°C and utilizes TTL-compatible inputs for seamless interface with standard logic families.

Feature Summary

• Dual JK flip-flop configuration providing two independent storage elements within a single package
• High output drive capability supporting direct loading of standard logic circuits
• TTL-compatible input thresholds ensuring interoperability with existing digital systems
• Low power consumption characteristics suitable for energy-efficient designs

Applications

• Digital data storage and register applications
• Sequential logic circuit implementation
• Frequency division and counting circuits
• State machine design and control logic

Procurement Notes

Verify component authenticity through authorized distributors due to the discontinued status of this specific part number. Confirm that the 16-PDIP package matches your PCB footprint requirements. Ensure supply chain sources provide valid RoHS compliance documentation. Cross-reference datasheet specifications against your system timing constraints before finalizing procurement decisions.

Selection Notes

Select this component when a dual JK flip-flop solution is required with through-hole mounting capabilities. Consider the 11 ns propagation delay for timing-sensitive applications. Evaluate the 24 mA output current against load requirements. Compare against active alternatives if long-term availability is a primary constraint, while maintaining pin compatibility and logical functionality.

Part Context

This component belongs to the 74ACT series, representing advanced CMOS technology compatible with TTL logic levels. It serves as a fundamental building block for sequential logic designs. The 74ACT109PC specifically integrates two JK flip-flops, offering a compact solution for memory and control functions compared to discrete implementations or single-function variants.

Replacement Considerations

Public confirmed substitute part numbers include SN74ACT109N from Texas Instruments. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure the replacement maintains the same 16-PDIP package form factor for direct board replacement without layout modifications.