74AC251SJX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC251SJX is an 8-input digital multiplexer featuring 3-STATE outputs, housed in a 16-Lead Small Outline Package (SOP). It operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature from -40°C to +85°C. The device provides both true and complementary outputs with source/sink capabilities of 24 mA. Propagation delays for select-to-output transitions typically range from 8.5 ns to 19.0 ns depending on voltage and load conditions.

Signal Switches, Multiplexers, Decoders Feature Summary

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

Signal Switches, Multiplexers, Decoders Applications

• Data routing and selection in digital systems
• Universal function generation using four logic variables
• Bus expansion by tying outputs of multiple devices together

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific SOP package variant against the M16D drawing when sourcing. Confirm that the 'X' suffix denotes tape and reel packaging if required for automated assembly. Ensure compatibility with the 2.0V to 6.0V operating range for your target application voltage.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring high-speed 8-channel data selection with tri-state output control. Consider the AC series for operation across a wider voltage range compared to ACT variants. Verify that the 24 mA output drive current meets the load requirements of the downstream circuitry.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC family of high-speed CMOS logic devices. It serves as a standard 8-to-1 multiplexer solution, offering a balance of speed and power consumption. The SOP package provides a compact surface-mount footprint suitable for dense PCB layouts.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT251 is a compatible alternative with TTL-compatible inputs but requires a 4.5V to 5.5V supply. Other 8-input multiplexers in the 74AC or 74HC families may serve as substitutes if pinout and electrical characteristics align.