74F251APC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74F251APC is an obsolete high-speed 8-input digital multiplexer housed in a 16-lead Plastic Dual-In-Line Package (PDIP). It features three-state outputs and operates within a supply voltage range of +4.5V to +5.5V. The device provides both assertion and negation outputs, controlled by three select inputs. It supports a free air ambient temperature range of 0°C to +70°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Multifunctional capability for universal logic function generation
• On-chip select logic decoding for input selection
• Inverting and non-inverting three-state outputs

Signal Switches, Multiplexers, Decoders Applications

• Data selection from multiple sources
• Universal function generator for four variables
• Multiplexer expansion via tied outputs

Signal Switches, Multiplexers, Decoders Procurement Notes

This component is officially obsolete and no longer manufactured. Verification of availability requires checking authorized distributors for remaining stock or approved parameter-equivalent substitutes. Ensure the selected replacement matches the PDIP package and electrical specifications.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this part only if legacy compatibility with the 16-lead PDIP form factor is required. Verify that the operating environment stays within the specified 0°C to +70°C temperature range. Confirm that the single-supply voltage requirements align with the system design constraints.

Signal Switches, Multiplexers, Decoders Part Context

The 74F251A series belongs to the F/FAST logic family, designed for high-speed digital applications. This specific variant implements an 8-to-1 multiplexing function with tri-state control, allowing integration into complex bus structures where multiple devices share common data lines.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Public confirmed substitute part numbers include SN74F251BD and SN74F251BDR from Texas Instruments, which are listed as parameter equivalents.