CD74ACT74M

Overview

The CD74ACT74M is a dual D-type edge-triggered flip-flop from Texas Instruments' ACT logic series. It features independent data (D), clock (CLK), set (SET), and reset (RESET) inputs for each of its two circuits, providing complementary Q and /Q outputs. The device operates within a supply voltage range of 1.5 V to 5.5 V, with typical operation at 5 V. It utilizes a 14-pin SOIC package for surface-mount installation. Key electrical parameters include a maximum propagation delay of 125 ns at 5 V with a 50 pF load, and output drive capabilities of -24 mA high and 24 mA low. The component supports a wide operating temperature range from -55 °C to +125 °C.

Feature Summary

• Dual configuration containing two independent D-type flip-flops with dedicated control inputs.
• Edge-triggered operation synchronized to the positive transition of the clock signal.
• Asynchronous preset and clear functions allowing immediate state setting or resetting.

Applications

• Parallel-to-serial data conversion in communication interfaces
• Shift register construction for digital signal processing
• General-purpose storage elements in microprocessor systems

Procurement Notes

Verify the specific suffix against the manufacturer's current documentation to confirm pinout compatibility and electrical characteristics. Ensure the selected variant matches the required package type and temperature rating for the target application environment. Cross-reference the ordering information with official datasheets to avoid discrepancies between legacy part numbers and current production versions.

Selection Notes

Select this component when dual independent storage elements are required within a single package footprint. The ACT series offers speed-performance comparable to standard TTL while maintaining CMOS power efficiency. Consider the asynchronous control inputs for applications requiring immediate state overrides without clock synchronization. Evaluate the 1.5 V to 5.5 V operating range to ensure compatibility with the system's power supply architecture.

Part Context

The CD74ACT74M belongs to the CD74ACT family of high-speed CMOS logic devices manufactured by Texas Instruments. This series is designed to provide performance levels similar to classic TTL logic but with the lower power consumption and wider voltage tolerance characteristic of CMOS technology. The ACT family is widely used in digital systems requiring reliable state retention and fast switching speeds across industrial and commercial temperature ranges.

Replacement Considerations

CD74ACT74DR

FAQ

Are the set and reset functions synchronous or asynchronous?

The set and reset functions are asynchronous, meaning they override the clock and data inputs to immediately force the output to a defined state.

What is the maximum operating supply voltage for this device?

The maximum operating supply voltage is 5.5 V, although the device is typically operated at 5 V for optimal performance matching TTL standards.