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The MM74HC4051SJX is a single 8-channel analog multiplexer/demultiplexer fabricated with silicon gate CMOS technology. It features bidirectional switches controlled by three digital address inputs (A, B, C). The device includes an inhibit input to disable all channels and supports analog signal ranges up to ±6V peak when powered by dual supplies or 0–5V logic with VEE connected to ground. Key electrical parameters include a typical on-resistance of 50Ω at VCC-VEE=4.5V, maximum quiescent current of 80µA, and propagation delay of 15ns. It operates within a supply voltage range of 2V to 6V for single supply or ±1V to ±6V for dual supply configurations.
Verify the specific suffix 'SJX' against official Fairchild or ON Semiconductor datasheets, as standard part numbers often use 'M' or 'N'. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to procurement. Ensure the supplier provides traceability documentation for this obsolete component variant.
Select this component when an 8-channel analog switch with low distortion and wide bandwidth is required. Compare on-resistance stability and leakage current specifications against alternatives if operating near the limits of the ±6V analog input range. Verify package compatibility with existing PCB footprints for the SOIC-16 configuration.
This component belongs to the 74HC series of high-speed CMOS logic devices. It is functionally compatible with the metal-gate CMOS4000B series but offers faster switching speeds and lower power consumption. The device is widely used in industrial and consumer electronics where reliable analog signal switching is necessary.
The MM74HC4051SJX is listed as obsolete. Verified substitutes include MC74HC4051ADWG and MC74HC4051ADWR2G from ON Semiconductor. These replacements maintain pin-to-pin compatibility and similar electrical characteristics for direct board upgrades.