74F251ASCX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74F251ASCX is an 8-input digital multiplexer with 3-STATE outputs, part of the 74F logic family. It features a single circuit configuration in a 16-lead Small Outline Integrated Circuit (SOIC) package. The device operates on a single power supply ranging from 4.5V to 5.5V and supports an ambient operating temperature range of 0°C to +70°C. Electrical characteristics include a maximum propagation delay of 9.5ns at 5.0V and a typical power supply current of 22mA when outputs are LOW.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides multifunctional capability for selecting one bit of data from up to eight sources.
• Includes on-chip select logic decoding controlled by three Select inputs.
• Features both assertion and negation outputs with 3-STATE capability.

Signal Switches, Multiplexers, Decoders Applications

• Universal function generator for generating any logic function of four variables
• Multiplexer expansion by tying outputs of multiple devices together
• High-speed digital data routing applications

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the ordering code includes the 'X' suffix to confirm tape and reel packaging, as standard versions may come in tubes. Confirm the manufacturer origin, noting historical Fairchild Semiconductor production now under onsemi. Ensure compatibility with existing SOIC M16A footprints during procurement planning.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for high-speed multiplexing requirements within the 74F logic family. Consider the 3-STATE output feature if bus expansion or multi-device sharing is required. Verify voltage levels against system specifications, specifically the 4.5V to 5.5V supply range and input/output voltage thresholds.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74F series of high-speed TTL logic components. It serves as a functional equivalent to other 8-to-1 multiplexers in the industry, offering complementary outputs and active-low enable control. The specific 'ASCX' designation indicates the SOIC package variant supplied in tape and reel format.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Public confirmed substitute part numbers: SN74F251BD, SN74F251BDR.