CD74ACT74E

Overview

The CD74ACT74E is a dual D-type flip-flop from the Texas Instruments ACT logic series, housed in a 14-pin PDIP package. It features positive edge triggering with set and reset capabilities. The device operates within a supply voltage range of 4.5 V to 5.5 V, supporting TTL input levels. Key electrical parameters include a maximum propagation delay of 9.5 ns at 5 V with 50 pF load capacitance, and output drive currents of ±24 mA. Static current consumption is specified at 4 µA, with an operating temperature range extending from -55°C to +125°C.

Feature Summary

• Dual independent D-type flip-flops with positive edge clock triggering
• Integrated asynchronous preset (set) and clear (reset) functions
• TTL-compatible input logic levels for direct interface compatibility
• High noise immunity and low static power consumption characteristics

Applications

• Parallel data storage and buffering in digital systems
• Frequency division and counter circuits
• Shift register construction for serial-to-parallel conversion
• Timing control and synchronization logic modules

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and specific manufacturing lot codes against current datasheets. Ensure packaging integrity matches the specified tube format. Cross-reference part numbers carefully as obsolete status may affect long-term availability and sourcing options.

Selection Notes

Select this component when dual isolated D-type storage with dedicated control inputs is required. The ACT series offers superior speed compared to standard 74LS equivalents while maintaining pin compatibility. Consider the 14-pin DIP package for prototyping or through-hole assembly requirements. Evaluate the 9.5 ns delay against system timing constraints to ensure adequate setup and hold times are met.

Part Context

This device belongs to the Texas Instruments CD74ACT family, designed for high-speed CMOS applications requiring TTL compatibility. The ACT series bridges performance gaps between older bipolar technologies and modern CMOS solutions. As a dual flip-flop configuration, it serves fundamental sequential logic roles in microprocessor interfaces and memory addressing schemes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other dual D-type flip-flops from the same logic family if cross-referencing is necessary.