74HC164D14

Shift Registers Overview

The 74HC164D14 is an 8-bit parallel-out serial shift register manufactured by Diodes Incorporated. It operates on a wide supply voltage range from 2.0V to 6.0V and features Schmitt trigger action at all inputs for noise immunity. The device includes asynchronous master reset functionality and provides ESD protection exceeding JESD 22 standards, specifically 2000-V Human Body Model and 200-V Machine Model ratings. It is available in a PDIP-14 package.

Shift Registers Feature Summary

• Serial data input pins are logically ANDed, allowing either pin to serve as an active HIGH enable with data entry on the other.
• Asynchronous Master Reset (MR) pin forces all outputs to LOW regardless of clock or serial input conditions.
• Positive-edge triggered shifting transfers data from serial inputs to Q0 and subsequently through stages Q1 to Q7 on each clock pulse.
• Totally lead-free and fully RoHS compliant with halogen and antimony-free construction.

Shift Registers Applications

• General purpose logic circuits
• PCs, networking equipment, notebooks, and netbooks
• Computer peripherals including hard drives and CD/DVD ROMs
• TV, DVD, DVR, and set-top box systems

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type. The D14 suffix indicates a PDIP-14 tube packaging format. Confirm that the application environment stays within the recommended operating temperature range of -40°C to +125°C. Ensure unused inputs are tied to VCC or Ground to prevent floating states. Check for compliance with local environmental directives such as RoHS 2.

Shift Registers Selection Notes

Select this component when an 8-bit serial-to-parallel conversion is required with push-pull outputs. The HC logic family offers compatibility with LSTTL levels while maintaining CMOS low power consumption. Consider the PDIP-14 package for through-hole mounting requirements. Verify that the supply voltage falls between 2.0V and 6.0V for proper operation.

Shift Registers Part Context

This part belongs to the 74HC164 series of 8-bit serial shift registers. It follows JEDEC standard no. 7A and is pin-compatible with other logic families like LSTTL. The device is designed for general-purpose digital applications requiring reliable data shifting and storage capabilities in standard industrial temperature ranges.

Shift Registers Replacement Considerations

Public confirmed substitute part numbers include 74HCT164 variants for TTL-compatible logic levels and 74AHCT164 for advanced high-speed CMOS performance. Cross-reference pinouts and electrical characteristics carefully when substituting across different logic families.

Shift Registers FAQ

How do the dual serial input pins function?

The serial data input pins DSA and DSB are internally ANDed. Either pin can act as the data input while the other serves as an active HIGH enable, or they can be tied together for single-input operation.

What is the behavior of the Master Reset pin?

When the MR pin is asserted LOW, it asynchronously sets all outputs (Q0-Q7) to LOW. This action overrides all other inputs and does not depend on the clock signal.