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. The commercial temperature grade (0°C to 70°C) limits it to indoor, controlled environments — think lab instruments, benchtop test gear, or office-equipment signal routing. Not for automotive or outdoor telecom enclosures.
Signal integrity specs — what they mean for your analog path
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.
Active production — no LTB clock ticking
The MAX309CSE+ carries an Active lifecycle status. That means no last-time-buy window to chase, no end-of-life paperwork to file. This is a current-production part you can qualify into a new BOM without worrying about a surprise EOL notice next quarter. RoHS3 compliant, so it passes EU and most global environmental requirements without an exemption hunt.
Sourcing reality
This part is sourced through independent distribution channels. No minimum quantity barrier — we can quote small lots for prototype builds or production volumes.