CD74HCT273EE4

Overview

The CD74HCT273EE4 is an octal D-type flip-flop from Texas Instruments' HCT logic family, housed in a 20-pin EE DIP package. It features positive-edge triggering and a master reset input that forces outputs low independently of clock or data states. The device operates within a supply voltage range of 4.5 V to 5.5 V, supporting TTL-compatible inputs with CMOS outputs. It provides non-inverting outputs capable of sourcing and sinking up to 4 mA. The component is designed for industrial temperature ranges, ensuring reliable performance across demanding electronic applications.

Feature Summary

• Octal configuration containing eight independent D-type flip-flops within a single integrated circuit
• Positive-edge triggered operation synchronized with the clock signal transition
• Master reset functionality that asynchronously clears all outputs to a low state
• TTL-compatible input levels interfacing directly with standard logic families

Applications

• Parallel-to-serial data conversion circuits
• Shift register implementations for data storage and transfer
• General-purpose digital memory elements in control systems
• State machine output latching in microcontroller interfaces

Procurement Notes

Verify the specific suffix EE4 confirms the extended industrial temperature rating and lead-free composition as per Texas Instruments documentation. Ensure the DIP-20 package matches the target PCB footprint requirements. Cross-reference the manufacturer part number against official TI databases to confirm current production status and availability before finalizing procurement plans.

Selection Notes

Select this component when an octal storage element with TTL-compatible inputs is required for high-speed digital applications. The HCT series ensures compatibility with standard 5V logic systems while offering improved noise immunity compared to older LS variants. Consider the DIP-20 package constraints for through-hole assembly processes and verify thermal management needs for industrial operating environments.

Part Context

This part belongs to the SN74HCT273 family of octal D-type flip-flops manufactured by Texas Instruments. The HCT technology combines the speed of HMOS with CMOS power consumption and TTL input compatibility. The EE4 designation indicates a specific commercial/industrial grade variant with lead-free packaging, distinguishing it from military or space-grade equivalents within the broader 74HCT product line.

Replacement Considerations

• CD74HCT273E
• SN74HCT273N