MC74HC165AFR1

Shift Registers Overview

The MC74HC165AFR1 is an 8-bit serial or parallel-input/serial-output shift register manufactured by onsemi. It utilizes high-performance silicon-gate CMOS technology and features a pinout identical to the LS165. The device supports asynchronous parallel loading when the Serial Shift/Parallel Load input is low, and serial shifting on the rising edge of the clock when the load input is high. It includes a 2-input NOR clock for combining independent sources or acting as a clock inhibit.

Shift Registers Feature Summary

• Supports both asynchronous parallel data loading and synchronous serial shifting operations
• Features a dual-input NOR clock mechanism allowing independent clock sources or clock inhibition
• Outputs are directly compatible with CMOS, NMOS, and TTL logic families

Shift Registers Applications

• Data acquisition systems requiring parallel-to-serial conversion
• Input expansion for microcontroller-based digital interfaces
• Digital signal processing chains involving serial data transmission

Shift Registers Procurement Notes

Verify the specific suffix FR1 against official datasheets to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage requirements ranging from 2.0 V to 6.0 V. Confirm RoHS compliance status through manufacturer documentation prior to integration into final assemblies.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel-load capability is required in a small outline package. It serves as a direct pin-compatible replacement for LS165 devices. Consider its noise immunity and low input current characteristics for CMOS-heavy designs.

Shift Registers Part Context

This part belongs to the HC165 family of 8-bit shift registers. It is designed for general-purpose digital logic applications where data serialization is necessary. The device is part of onsemi's standard product line, offering reliability and compatibility with industry-standard logic levels.

Shift Registers Replacement Considerations

The MC74HC165A is functionally identical to the SN74HC165. Verify pinout compatibility with LS165 equivalents if migrating from older technologies. Check alternative manufacturers such as Texas Instruments or NXP for equivalent parts.