Dual SP4T analog multiplexer — signal routing for industrial and test gear
The Maxim DG409DY+ packs two independent SP4T switches (4:1 multiplexer/demultiplexer per circuit) into a 16-pin SOIC. Each switch connects a common I/O pin to one of four channels, with the two sections operating in parallel or independently depending on the enable logic. The -92 dB crosstalk at 100 kHz keeps channel bleed low enough for 16-bit data acquisition and audio-band multiplexing. On-resistance maxes out at 100 ohm, with channel-to-channel matching held to 1.5 ohm — that matching matters when you're switching gain-setting resistors or scaling divider networks where the absolute R_on matters less than the ratio between paths. Switching time is 150 ns for both turn-on and turn-off, fast enough to scan eight channels at several hundred kilohertz without dead-time gaps. Single-supply range is 5 V to 30 V; dual-supply range is ±5 V to ±20 V. The -40 to 85 °C operating range suits factory-floor PLC analog input modules, data loggers, and outdoor telecom line cards. Charge injection is a moderate 2 pC — acceptable for sampled-data systems with a settling-time budget, not for sub-pC precision metrology.
Lifecycle and sourcing — active, no redesign pressure
DG409DY+ has an Active lifecycle status and is ROHS3 Compliant. For a BOM line that needs a dual SP4T mux in 16-SOIC with wide supply range, this is a straightforward procurement — no surplus-broker chasing required.
Package and handling — 16-SOIC in Tube
The part ships in the 16-lead SOIC body (0.154" wide, 3.90 mm body width) — a common footprint shared by many analog muxes and op-amps. The supplier device package is 16-SOIC, and the listed shipping form is Tube. For high-volume assembly, verify that your pick-and-place feeder accepts Tube input or request Tape & Reel from the distributor at quote time.