SN74F251BN

Overview

The SN74F251BN is an 8-line to 1-line data selector and multiplexer from the Texas Instruments SN74F series. It features eight data inputs, three address select lines, and a single output with three-state capability. The device operates within a supply voltage range of 4.5 V to 5.5 V. It exhibits a propagation delay of 9.5 ns and functions reliably across an operating temperature range of 0°C to +70°C. The component is housed in a 16-pin PDIP package designed for through-hole mounting.

Feature Summary

• Provides high-speed data selection and multiplexing functionality using F-series logic technology.
• Integrates three-state output control to facilitate bus-oriented communication systems.
• Supports direct interfacing with microprocessors and digital logic circuits.

Applications

• Data routing in digital communication systems
• Address decoding in memory architectures
• Signal selection in instrumentation equipment

Procurement Notes

Verify that the specific order matches the SN74F251BN designation, including the 'B' suffix which indicates the plastic DIP variant. Confirm RoHS compliance status as indicated in official documentation. Ensure the procurement channel provides valid manufacturer traceability. Check for any specific handling requirements associated with CMOS logic devices during storage and installation.

Selection Notes

Select this component when an 8-to-1 multiplexer with three-state outputs is required in a through-hole design. The SN74F series offers faster switching speeds compared to standard LS or HC counterparts. Verify that the system power supply remains strictly within the 4.5 V to 5.5 V limits to ensure correct logic levels and prevent damage to the internal circuitry.

Part Context

This part belongs to the SN74F family of high-speed CMOS logic devices manufactured by Texas Instruments. The SN74F251 specifically addresses applications requiring efficient data path management. It serves as a fundamental building block for complex digital systems where multiple data sources must be directed to a single destination based on control signals.

Replacement Considerations

SN74F251BD: A surface-mount equivalent offering identical electrical performance in a SOIC package.