MM74HC251SJ

Signal Switches, Multiplexers, Decoders Overview

The MM74HC251SJ is an 8-channel digital multiplexer with 3-STATE outputs manufactured by onsemi. It utilizes advanced silicon-gate CMOS technology and operates within a supply voltage range of 2V to 6V. The device features both true (Y) and complement (W) outputs controlled by a STROBE input, which must be low to enable the device. It provides high noise immunity, low power consumption, and can drive 10 LS-TTL loads. Typical propagation delay from data select to Y is 26 ns at 5V.

Signal Switches, Multiplexers, Decoders Feature Summary

• Features 3-STATE outputs suitable for bus-oriented system interfacing
• Provides both true and complement output signals
• Includes internal diode clamps for static discharge protection on all inputs
• Compatible with standard 74LS logic family in speed, function, and pinout

Signal Switches, Multiplexers, Decoders Applications

• Interfacing with bus lines in bus-oriented systems
• Data routing applications requiring selection among multiple sources
• Digital signal switching in general-purpose logic circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering code suffix 'SJ' corresponds to the 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide as defined in the datasheet. Confirm that the component is sourced from authorized distributors to ensure authenticity, as the manufacturer reserves the right to change specifications without notice. Check for RoHS compliance documentation if required for your assembly process.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when an 8-to-1 multiplexing function with tri-state capability is required. Ensure the operating voltage falls between 2V and 6V. Consider the package width of 5.3mm for PCB layout constraints. Verify that the load requirements do not exceed the specified DC output current limits per pin.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is functionally equivalent to other 8-channel multiplexers in the industry but is distinguished by its specific SOP packaging and onsemi manufacturing origin. The device is designed to replace older 74LS equivalents while offering lower power consumption.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for direct pin-compatible alternatives such as the MM74HC251M or MM74HC251N if different packaging is needed. Verify electrical characteristics against other manufacturers' 74HC251 equivalents to ensure compatibility with existing circuit designs.