MAX349/MAX350 are 8-channel and dual 4-channel serially controlled multiplexers (muxes) with the following features:
The MAX349 and MAX350 are 8‑channel (MAX349) and dual 4‑channel (MAX350) serially controlled analog multiplexers. They operate with dual supplies from ±2.7 V to ±8 V or a single supply from +2.7 V to +16 V and support both TTL and CMOS logic levels.
The devices feature on‑resistance up to 100 Ω, off‑leakage currents as low as 0.1 nA at 25 °C, and can be daisy‑chained via a shift‑register interface compatible with SPI/QSPI and MICROWIRE. Detailed electrical characteristics, timing parameters, and pin‑out diagrams are provided for designers.
| On‑Resistance (max) | 100 Ω |
|---|---|
| On‑Resistance match | 16 Ω max |
| Off‑Leakage Current (25 °C) | 0.1 nA |
| Supply Voltage Range (dual) | ±2.7 V to ±8 V |
| Supply Voltage Range (single) | +2.7 V to +16 V |
| Turn‑On Time | 400 ns |
| Turn‑Off Time | 300 ns |
| Break‑Before‑Make Delay | 2 ns |
| Channel‑to‑Channel Crosstalk | < ‑90 dB |
The maximum on‑resistance is 100 Ω.
They can run from dual supplies of ±2.7 V to ±8 V or a single supply of +2.7 V to +16 V.
The off‑leakage current is only 0.1 nA at +25 °C.
Yes, the shift‑register output (DOUT) allows several devices to be daisy‑chained.