CD74AC109E

Overview

The CD74AC109E is a dual J-K flip-flop manufactured by Harris Corporation, belonging to the AC logic series. It features differential outputs and single-ended inputs housed in a PDIP-16 package. The device operates within a supply voltage range of 1.5 V to 5.5 V. Key electrical specifications include a propagation delay of 10.5 ns, with high-level output current capability of -4 mA and low-level output current of 4 mA. It supports through-hole mounting and functions across an operating temperature range from -55 °C to 125 °C.

Feature Summary

• Dual J-K flip-flop configuration with differential outputs
• Wide operating voltage range supporting 1.5 V to 5.5 V
• High-speed performance with 10.5 ns propagation delay
• Robust thermal stability for industrial environments

Applications

• Digital data storage circuits
• Shift register implementations
• Frequency division networks
• State machine control logic

Procurement Notes

Verify the manufacturer origin carefully, as Rochester Electronics may distribute Harris-derived components. Confirm the specific package variant matches the PDIP-16 requirement. Ensure the AC series designation aligns with system voltage and speed requirements. Check RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when dual independent J-K functionality is required in a single package. The AC series offers a balance of speed and power consumption suitable for general-purpose digital applications. The wide voltage range allows compatibility with various logic families. Consider the PDIP-16 form factor for prototyping or through-hole manufacturing processes.

Part Context

This part belongs to the Harris CD74AC family of high-speed CMOS logic devices. The AC series was designed to provide improved performance over earlier HC variants while maintaining pin compatibility. Harris Corporation originally developed these components before their semiconductor assets were acquired, leading to distribution by other entities like Rochester Electronics.

Replacement Considerations

CD74HC109E: Similar function but slower speed (40 ns) and different voltage range (4.5-5.5V). SN74AC109N: Pin-compatible alternative from Texas Instruments with identical AC series specifications.