74F148SC

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74F148SC is an 8-Line to 3-Line Priority Encoder belonging to the F/FAST logic series. It accepts data from eight active-Low inputs and provides a binary representation on three active-Low outputs. The device assigns priority to each input, ensuring that when multiple inputs are simultaneously active, the line with the highest priority (I7) is represented on the output. Key features include code conversion capabilities, multi-channel D/A converter support, decimal-to-BCD conversion, and cascading for priority encoding of N bits. It also offers input enable capability and group signal output functionality.

Signal Switches, Multiplexers, Decoders Feature Summary

• Accepts eight active-Low inputs and encodes them into a three-bit binary output
• Assigns priority to inputs, automatically selecting the highest priority active line
• Supports cascading for expanding priority encoding capabilities across multiple bits
• Provides group signal output that activates when any input is Low

Signal Switches, Multiplexers, Decoders Applications

• Code conversions
• Multi-channel D/A converter systems
• Decimal-to-BCD converter circuits
• Cascading for priority encoding of N bits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific manufacturer source document for the 74F148SC to confirm current availability status, as legacy F-series components may have varying supply chain statuses. Ensure the ordering suffix matches the required package type and environmental compliance standards. Cross-reference the datasheet for exact pinout configurations and electrical characteristics relevant to your specific system design requirements before finalizing procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when an 8-input priority encoder with active-Low inputs and outputs is required within the F/FAST logic family. It is suitable for applications needing automatic selection of the highest priority input line among multiple simultaneous signals. Consider its compatibility with standard TTL voltage levels and its ability to cascade for larger encoding needs compared to simpler encoders.

Signal Switches, Multiplexers, Decoders Part Context

The 74F148SC is part of the broader 74F148 series of 8-Line to 3-Line Priority Encoders produced by Fairchild Semiconductor. This series includes variants such as the 74F148PC, 74F148SJ, and others, all sharing the same core functional description. These devices are designed for high-speed digital logic applications requiring efficient priority encoding in compact packages.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Public confirmed substitute part numbers include 74F148PC, 74F148SJ, and MC14532B. Verify pinout and electrical compatibility with these alternatives before implementation.