Dual SP4T mux — two independent 4:1 channels in one 16-SOIC
The Maxim MAX309CSE+ packs two independent SP4T (single-pole, four-throw) analog switches into a single 16-SOIC package, giving you a 4:1 multiplexer per channel. Each channel routes one of four analog inputs to a common output, controlled by separate digital address lines. The 100Ohm max on-resistance stays matched within 1.5Ohm channel-to-channel, which keeps gain errors predictable across the multiplexed path. Switching completes in 150ns — fast enough for moderate-speed data acquisition or audio routing, but not for video-rate signals. Supply flexibility is the headline: run it off a single rail from 5V to 30V, or split ±5V to ±20V. That single-supply range means you can drop it into a 5V logic system or a 24V industrial analog front-end without a separate negative rail. Not for automotive or outdoor telecom enclosures.
Crosstalk sits at -92dB at 100kHz. Off-leakage current is 750pA maximum. Charge injection is 2pC. Channel off-capacitance is 26pF on the drain side.
That means no last-time-buy window to chase, no end-of-life paperwork to file. RoHS3 compliant, so it passes EU and most global environmental requirements without an exemption hunt.
Sourcing reality
No minimum quantity barrier — we can quote small lots for prototype builds or production volumes.