54165/BFA

Overview

The SN54165/BFA is an 8-bit parallel-load or serial-in shift register manufactured by Rochester Electronics. It features complementary outputs from the last stage and asynchronous parallel loading when the Parallel Load input is LOW. Serial shifting occurs on the rising edge of the clock with new data entering via the Serial Data input. The device includes a 2-input OR gate for the clock, allowing combination of independent clock sources or acting as an active LOW clock enable.

Feature Summary

• Supports asynchronous parallel loading and synchronous serial shifting operations
• Provides complementary outputs from the final stage
• Integrates a 2-input OR gate for flexible clock source management

Applications

• Parallel-to-serial data conversion
• Serial-in register configurations
• Digital signal processing interfaces

Procurement Notes

Verify the specific suffix BFA against official datasheets to confirm package type and temperature range. Confirm that the component meets required military specifications if applicable, as the SN54xx series typically denotes military-grade performance. Ensure compatibility with existing system voltage levels and clock requirements before integration.

Selection Notes

Select this component for applications requiring reliable 8-bit shift register functionality with parallel load capabilities. Consider the SN74165 variant for commercial grade applications if military specifications are not required. Evaluate the clock gating feature for systems needing combined clock inputs.

Part Context

This part belongs to the SN54165 family of 8-bit shift registers. It is a legacy component often sourced through distributors like Rochester Electronics for maintenance and repair purposes. The SN54xx designation indicates it is designed for military-grade environments, offering wider operating temperature ranges compared to commercial counterparts.

Replacement Considerations

• SN74165