What this quad SPST switch brings to the bench
The Maxim Integrated DG413CY+ is a quad single-pole single-throw analog switch with a mix of normally-open and normally-closed poles (SPST - NO/NC), packaged in a 16-SOIC. It handles single-supply rails from 10 V to 30 V or dual supplies from ±4.5 V to ±20 V, making it flexible for audio routing, data acquisition front-ends, or precision signal multiplexing. The 45 Ohm max on-resistance is moderate — fine for low-frequency analog signals where a few ohms of series resistance won't kill the CMRR, but you'll want to check the voltage drop across the switch at your signal current. The 175 ns turn-on and 145 ns turn-off times keep up with most industrial sensor scanning rates.
Key specs that drive the BOM decision
Channel-to-channel matching is held to 3 Ohms max, which matters when you're switching gain-setting resistors in a programmable amplifier — the mismatch directly shifts the gain between channels. Off-leakage is 250 pA max, low enough that it won't swamp a high-impedance source in a sample-and-hold. Charge injection is 5 pC typical; that glitch couples into the hold capacitor, so budget for a settling period if you're switching into a fast ADC. The -85 dB crosstalk at 1 MHz is a solid figure for a 16-pin SOIC — it keeps the left channel out of the right in audio crosspoint applications.
Package and temperature — the fit check
The 16-SOIC body (3.90 mm width) is a common footprint; the supplier device package is also 16-SOIC, so no footprint mismatch. The operating temperature range is 0°C to 70°C.
Lifecycle and sourcing reality
The DG413CY+ is listed as Active and ROHS3 compliant, so there's no imminent last-time-buy pressure. It's a current-production Maxim part, available through independent distribution. For a BOM line that needs this exact quad switch, the supply channel is stable — no need to panic-buy or qualify a substitute unless you're dual-sourcing for resilience.