MC74HC164ADR2G

Shift Registers Overview

The MC74HC164ADR2G is an 8-bit serial-input parallel-output shift register manufactured by onsemi using high-performance silicon-gate CMOS technology. It operates within a DC supply voltage range of 2.0 V to 6.0 V and features two serial data inputs, A1 and A2, which allow one input to function as a data enable. Data is shifted into the register on each rising edge of the clock signal. The device includes an active-low asynchronous reset that overrides both the clock and serial data inputs, forcing all outputs low. It provides eight true parallel outputs (QA through QH) and is compatible with standard CMOS outputs and LSTTL outputs when pull-up resistors are used.

Shift Registers Feature Summary

• Provides eight parallel outputs for simultaneous data retrieval from the shift register stages.
• Features dual serial inputs allowing flexible configuration where one input serves as a data enable control.
• Includes an active-low asynchronous reset function that immediately clears all internal flip-flops regardless of clock or data states.
• Compatible with standard CMOS logic levels and interfaces directly with NMOS and TTL families.

Shift Registers Applications

• Serial-to-parallel data conversion in digital communication systems
• Driving LED displays or indicator arrays requiring sequential data loading
• General-purpose shift register applications in embedded control circuits

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type and automotive qualification status. The 'R2' suffix indicates tape and reel packaging. Confirm the '-Q' suffix if automotive-grade reliability and PPAP capability are required. Ensure the component meets RoHS compliance standards for environmental regulations. Cross-reference the marking diagram with the physical device to confirm authenticity and assembly details.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel output is needed for CMOS-compatible designs. Consider the operating voltage range of 2.0 V to 6.0 V for compatibility with various logic families. Evaluate the need for asynchronous reset functionality to manage state initialization. Check pinout compatibility with LS164 equivalents if replacing legacy designs. Verify package availability in SOIC-14 or TSSOP-14 formats based on board space constraints.

Shift Registers Part Context

This device belongs to the MC74HC164A family of 8-bit shift registers. It shares identical pinouts with the LS164 series, facilitating drop-in replacements in existing designs. The HC164A variant offers improved speed and lower power consumption compared to older logic families. It is part of onsemi's high-performance CMOS product line designed for general-purpose digital applications requiring reliable data shifting capabilities.

Shift Registers Replacement Considerations

The MC74HC164A is pin-compatible with the SN74LS164. Verify voltage level compatibility when substituting between HC and LS families. Ensure reset polarity and timing requirements match the original design specifications. Check package dimensions if transitioning between SOIC and TSSOP variants.