74HC164N,652

Shift Registers Overview

The NXP USA Inc. 74HC164N,652 is an 8-bit serial-in/parallel-out shift register housed in a 14-lead plastic dual in-line package (DIP14). It operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features two gated serial data inputs (DSA and DSB) and eight parallel outputs (Q0 to Q7). Data shifts on the LOW-to-HIGH clock transitions, while an active LOW master reset clears all outputs independently.

Shift Registers Feature Summary

• Features two gated serial data inputs that function as active HIGH enables for data entry through the other input.
• Includes an asynchronous master reset input that clears the register and forces all outputs LOW regardless of other inputs.
• Inputs are equipped with clamp diodes to allow interfacing with voltages exceeding VCC using current limiting resistors.

Shift Registers Applications

• Serial-to-parallel data conversion
• Parallel output expansion
• Data storage applications

Shift Registers Procurement Notes

Verify the specific ordering suffix '652' against the manufacturer's latest documentation to confirm the exact package variant and temperature rating. Ensure the procurement specifications align with the DIP14 form factor and the recommended operating conditions defined in the official datasheet.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel outputs is required. The HC logic family provides CMOS-level input compatibility. Verify that the application environment falls within the specified -40 °C to +125 °C temperature range and utilizes a supply voltage between 2.0 V and 6.0 V.

Shift Registers Part Context

This part belongs to the 74HC164 series of integrated circuits manufactured by NXP Semiconductors. It is designed for general-purpose digital logic applications requiring serial data shifting. The device complies with JEDEC standard no. 7A and includes ESD protection capabilities.

Shift Registers Replacement Considerations

The 74HCT164N,652 serves as a functional replacement within the same series, offering TTL-level input compatibility instead of CMOS levels. Both variants share identical pin configurations and logical functions.

Shift Registers FAQ

How does the master reset input affect the outputs?

A LOW signal on the master reset (MR) input clears the register and forces all parallel outputs (Q0 to Q7) to a LOW state, independent of the clock or data inputs.

What triggers the data shift operation?

Data is shifted into the register on the LOW-to-HIGH transitions of the clock (CP) input.