74ACT251SCX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74ACT251SCX is an 8-input digital multiplexer with 3-STATE outputs, housed in a 16-Lead Small Outline Integrated Circuit (SOIC) package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature from -40°C to +85°C. The device features TTL-compatible inputs and provides both true and complementary outputs. Outputs can source or sink up to 24 mA. Propagation delays for select-to-output transitions are typically 7.0 ns at 5.0 V, while input-to-output delays are typically 5.5 ns.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides multifunctional capability as a universal function generator for logic functions of four variables
• Includes on-chip select logic decoding for efficient data selection from eight sources
• Features inverting and noninverting 3-STATE outputs to facilitate bus expansion

Signal Switches, Multiplexers, Decoders Applications

• Universal function generation for logic circuits
• Data routing and selection systems
• Bus expansion configurations requiring high-impedance states

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering code suffix 'X' confirms tape and reel packaging availability. Confirm that the SOIC-16 package variant matches the required footprint for the target PCB design. Ensure the ACT series specifications align with the system's 5V logic requirements and temperature constraints.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when an 8-channel multiplexer with tri-state control is required. The ACT series ensures compatibility with TTL logic levels. Consider the 3-STATE output feature if multiple devices need to share a common bus line without electrical contention.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC/ACT251 family of high-speed digital multiplexers. It serves as a logical implementation of a single-pole, 8-position switch controlled by three select inputs. The device allows for the selection of one bit of data from up to eight distinct sources within a single integrated circuit package.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include the MC74AC251DR2G. Other compatible options may include parts from Texas Instruments such as the CD74AC251M, provided pinout and electrical characteristics match the application requirements.