CD74HCT73E

Overview

The CD74HCT73E is a dual JK-type flip-flop manufactured by Texas Instruments, belonging to the HCT logic series. It features two independent circuits within a single package, each configured as a negative-edge-triggered device with an asynchronous reset input. The component utilizes a 14-pin PDIP (Plastic Dual In-line Package) for through-hole mounting. Electrical specifications include a supply voltage range of 4.5 V to 5.5 V and a maximum propagation delay of 38 ns at 4.5 V with a 50 pF load. The static current consumption is specified at 4 µA, while output drive capabilities provide 4 mA for both high and low states. The operational temperature range extends from -55°C to +125°C.

Feature Summary

• Dual JK-type flip-flop architecture with negative-edge triggering
• Asynchronous reset functionality for immediate state control
• HCT logic compatibility ensuring TTL-level interface integration

Applications

• Digital data storage and register implementation
• Sequential logic circuit design
• Frequency division and counter applications

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and environmental compliance. Ensure the selected variant matches the required mounting style and thermal characteristics for the target application environment. Cross-reference the datasheet revision history to confirm current production status and any recent parameter updates before finalizing procurement.

Selection Notes

Select this component when dual JK flip-flops with asynchronous reset are required in a through-hole configuration. The HCT series ensures compatibility with standard TTL logic levels, simplifying interface design with microcontrollers or other digital systems. Consider the 14-pin PDIP footprint for prototyping or legacy board designs where surface-mount alternatives are unsuitable.

Part Context

The CD74HCT73E is part of the broader CD74HCT family of high-speed CMOS logic devices produced by Texas Instruments. This family bridges the performance gap between older TTL technologies and modern CMOS standards, offering robust noise immunity and low power consumption. The specific model integrates two JK flip-flops, providing a compact solution for sequential logic requirements compared to discrete implementations.

Replacement Considerations

Public confirmed substitute part numbers: CD74HCT73M, CD74HCT73M96.