74F251ASCX

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74F251ASCX is a high-speed digital multiplexer from the 74F series. It functions as an 8-input to 1-output selector with complementary outputs and TTL logic compatibility. The device operates on a single power supply within a voltage range of 4.5V to 5.5V. It features a 16-SOIC surface-mount package with a width of 3.90mm. Electrical characteristics include a maximum output current of 24mA for low states and 3mA for high states. The component supports operation across a standard industrial temperature range of 0°C to 70°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides eight independent input channels selectable via three address lines to route one bit of data to a single output
• Features 3-state outputs allowing direct connection to system buses without additional buffering
• Delivers high-speed switching performance characteristic of the F/FAST logic series

Signal Switches, Multiplexers, Decoders Applications

• Data routing in digital communication systems
• Address decoding in microprocessor-based designs
• Signal selection in test and measurement equipment

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the manufacturer designation, as this part number is associated with both Fairchild Semiconductor and its successor entity, onsemi. Confirm that the specific suffix matches the required package style and lead finish. Ensure the component meets the necessary environmental standards for your application before finalizing procurement orders.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a fast, 8-channel multiplexer with 3-state outputs is required for TTL-compatible circuits. Consider the 16-SOIC package constraints for PCB layout. Evaluate thermal requirements against the specified operating temperature range. Compare against other 74F series devices if pinout or speed variations are needed.

Signal Switches, Multiplexers, Decoders Part Context

This integrated circuit belongs to the 74F family of high-speed logic devices. It serves as a core signal routing component in digital electronics. The device is functionally equivalent to the SN74F251. It provides a compact solution for managing multiple data sources in complex digital architectures.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include the SN74F251BD and SN74F251BDR manufactured by Texas Instruments.