74ACT251SC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74ACT251SC 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 4.5V to 5.5V and supports temperatures from -40°C to +85°C. The device features TTL-compatible inputs and provides both true and complementary outputs. It includes on-chip select logic decoding for S0–S2 inputs and an active LOW Output Enable (OE). Outputs can source or sink up to 24 mA, ensuring robust drive capability for connected loads.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides multifunctional capability as an 8-input digital multiplexer with universal function generation potential.
• Features on-chip select logic decoding controlled by three select inputs to route specific data bits.
• Includes both true and complementary 3-STATE outputs for flexible system integration.

Signal Switches, Multiplexers, Decoders Applications

• Universal function generator for logic functions of four variables
• Data selection from multiple sources in digital systems
• Multiplexing expansion by tying outputs of multiple devices together

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the ordering code suffix matches the required package type, such as SC for SOIC. Confirm RoHS compliance status through official documentation before procurement. Ensure the selected variant aligns with the specified operating temperature range and voltage requirements for the target application environment.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when an 8-channel multiplexer with high-speed performance and 3-STATE output control is required. The ACT series ensures compatibility with TTL input levels while maintaining CMOS output characteristics. Consider the 16-pin SOIC package for surface-mount assembly needs and verify that the 24 mA output current meets the load requirements.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74AC/ACT family of high-speed logic components originally developed by Fairchild Semiconductor. The 74ACT251 specifically implements an 8-to-1 multiplexer architecture with tri-state outputs. It is part of a broader range of standard logic ICs designed for general-purpose digital applications requiring reliable signal routing and logic function implementation.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible substitutes include other 74ACT251 variants from different manufacturers, provided they maintain the same pinout, electrical specifications, and package dimensions. Verify that any replacement device supports the same 4.5V to 5.5V operating voltage and TTL-compatible input thresholds.