CD74HC173MG4

Overview

The CD74HC173MG4 is a high-speed CMOS logic device manufactured by Texas Instruments, belonging to the HC series. It functions as a quad D-type flip-flop with three-state outputs, packaged in a 16-pin TSSOP (Thin Shrink Small Outline) format. The component supports a supply voltage range of 2 V to 6 V and operates within an extended temperature range from -55 °C to +125 °C. Key electrical parameters include a propagation delay of 200 ns, a maximum high-level output current of -7.8 mA, and a maximum low-level output current of 7.8 mA. It features single-ended inputs and non-inverting polarity.

Feature Summary

• Integrates four independent edge-triggered D-type flip-flops for parallel data storage applications.
• Provides three-state outputs controlled by dual enable signals to facilitate bus driving and system isolation.
• Includes an asynchronous master reset input that forces all flip-flop outputs to a low state independently of the clock signal.

Applications

• High-speed disk and tape controller systems
• Communication buffer circuits
• Parallel-to-serial conversion modules

Procurement Notes

Verify the specific suffix 'MG4' against the manufacturer's official documentation to confirm compliance with lead-free and RoHS directives. Ensure the procurement channel sources components directly from authorized distributors or the manufacturer to guarantee authenticity. Cross-reference the package type and pinout configuration with the official datasheet to prevent integration errors during PCB assembly.

Selection Notes

Select this component when designing systems requiring multiple independent D-type registers with tri-state control capabilities. The wide operating voltage range and extended temperature specifications make it suitable for industrial environments. Consider the propagation delay characteristics relative to the system clock speed to ensure timing requirements are met without introducing signal integrity issues.

Part Context

This part belongs to the CD74HC173 family of logic integrated circuits produced by Texas Instruments. The HC designation indicates High-speed CMOS technology, offering performance comparable to standard TTL but with lower power consumption. The MG4 suffix typically denotes a specific manufacturing variant, often associated with environmental compliance standards such as lead-free processing.

Replacement Considerations

Public confirmed substitute part numbers: CD74HC173M, CD74HC173PW, CD74HC173E.