What this 8:1 analog multiplexer does on your board
The Analog Devices MAX4581CSE+T is a single 8-channel analog multiplexer/demultiplexer in a 16-SOIC package. It routes one of eight analog inputs to a common output (or the reverse) with an 80 ohm maximum on-resistance. The 8:1 mux/demux circuit handles both single-ended and differential signal paths, making it a fit for data-acquisition front-ends, audio routing, and test-equipment channel selection. Operates from a single 2V to 12V rail or dual ±2V to ±6V supplies. Temperature range is 0°C to 70°C. Switching speed is 200 ns on, 100 ns off, which is fast enough for audio-band multiplexing and moderate-speed data acquisition. The 1 nA max off-leakage and 4 pF / 18 pF channel capacitance keep signal integrity clean in precision analog paths.
Crosstalk and charge injection — the specs that matter for clean analog switching
Crosstalk is -78 dB at 1 MHz. Charge injection is 0.5 pC. Channel-to-channel on-resistance matching is 1 ohm max. That keeps gain errors consistent when the mux is used in a programmable-gain amplifier or a multi-channel sensor interface — the signal sees nearly the same resistance regardless of which channel is active.
Lifecycle and sourcing — active production, no obsolescence risk
The MAX4581CSE+T carries an active lifecycle status. The ROHS3 compliance is confirmed, so it passes EU material restrictions for new designs.