74HCT173D,652

Overview

The 74HCT173D,652 is a synchronous 4-bit D-type flip-flop with output latches manufactured by Nexperia USA Inc. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 50 MHz. The device features independent clock inputs for each flip-flop and includes an asynchronous master reset input. It is housed in a 16-SO surface-mount package and functions across a temperature range of -40°C to 125°C.

Feature Summary

• Synchronous 4-bit D-type flip-flops with individual clock control
• Asynchronous master reset functionality for immediate state clearing
• Output latching capability to maintain data states independently of clock transitions

Applications

• Data storage registers in digital logic circuits
• Shift register configurations for serial-to-parallel conversion
• State machine implementations requiring synchronized data capture

Procurement Notes

This component is obsolete and no longer manufactured by the producer. Verify availability through authorized distributors for remaining stock or identify equivalent replacement parts from current production lines. Ensure that any substitute components match the original pinout, electrical specifications, and package dimensions to maintain circuit compatibility without redesign.

Selection Notes

Select this part when a synchronous 4-bit latch with asynchronous reset is required in a 5V logic environment. The HCT series ensures TTL-compatible input thresholds while offering CMOS low power consumption. Confirm that the 16-SO package fits the PCB layout constraints and that the operating temperature range meets the application's environmental requirements.

Part Context

The 74HCT173 belongs to the Nexperia 74HCT logic family, designed for high-speed CMOS operation with TTL-compatible inputs. This specific variant provides four independent D-type flip-flops with output latches, commonly used in microprocessor interface circuits and memory address latching applications where precise timing synchronization is critical.

Replacement Considerations

• 74HCT173D,653
• CD74HCT173M
• MC74HCT173ADTR2G

FAQ

Does the 74HCT173D,652 have separate clock inputs for each flip-flop?

Yes, it contains four independent D-type flip-flops, each with its own clock input.

What type of reset mechanism does this component utilize?

It utilizes an asynchronous master reset input that clears all outputs regardless of the clock signal.