SN74F251BDR

Overview

The SN74F251BDR is an 8-input multiplexer manufactured by Texas Instruments, belonging to the 74F logic series. It features a single circuit configuration with three address inputs and one enable input. The device operates on a single power supply ranging from 4.5V to 5.5V. It utilizes a 16-pin SOIC package for surface-mount installation. The component supports data selection across eight independent lines based on binary address signals.

Feature Summary

• Provides high-speed data routing capabilities within digital logic systems
• Features active-low enable functionality for precise control of signal transmission
• Utilizes standard TTL-compatible voltage levels for interface integration

Applications

• Data routing in computer systems
• Signal switching in industrial control equipment
• Address decoding in memory architectures

Procurement Notes

Verify the specific suffix BDR indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is Texas Instruments to ensure compatibility with original specifications. Check for obsolescence status as F-series components may have limited availability. Ensure the operating temperature range meets system requirements.

Selection Notes

Select this component for applications requiring fast propagation delays typical of the 74F series. Compare against 74LS equivalents if lower power consumption is prioritized over speed. Verify that the 16-SOIC package dimensions fit the target PCB layout constraints. Ensure supply voltage stability remains within the specified 4.5V to 5.5V range.

Part Context

This part belongs to the widely used 74xx logic family, specifically the Fast (F) variant known for improved switching speeds compared to standard TTL. The SN74F251 functions as a data selector, allowing multiple input sources to be routed to a single output line based on control signals.

Replacement Considerations

The SN74F251BD is a parameter-equivalent alternative available from Texas Instruments. Other manufacturers may offer compatible parts within the same logic family, but pinout and electrical characteristics must be verified.