MAX4638/MAX4639 are single 8:1 and dual 4:1 CMOS analog multiplexers/demultiplexers (muxes/demuxes). Each mux operates from a single +1.8V to +5V supply or dual ±2.5V supplies. These devices fea- ture 3.5Ω on-resistance (RON) when powered with a single +5V supply and have -75dB off-isolation and -85dB crosstalk from the output to each off channel. The switching times are 18ns tON and 7ns tOFF. They feature a -3dB 85MHz bandwidth and a guaranteed 0.25nA leakage current at +25°C. A +1.8V to +5.5V operating range makes the MAX4638/ MAX4639 ideal for battery-powered, portable instru- ments. All channels guarantee break-before-make switching. These parts feature bidirectional operation and can handle Rail-to-Rail® analog signals. All control inputs are TTL/CMOS-logic compatible. Decoding is in standard BCD format, and an enable input is provided to simplify cascading of devices. These devices are avail- able in small 16-pin thin QFN, TSSOP, and SO packages, as well as a 20-pin thin QFN package.
The MAX4638 and MAX4639 are low‑voltage CMOS analog multiplexers/demultiplexers offered in 8:1 single‑ended and 4:1 dual‑ended configurations. They operate from a single +1.8 V to +5 V supply or dual +2.5 V supplies and feature rail‑to‑rail signal handling, TTL/CMOS‑compatible inputs, and break‑before‑make switching.
Typical applications include automatic test equipment, data‑acquisition systems, audio/video routing, medical equipment and battery‑powered devices. The devices are available in thin‑QFN, TSSOP and SO packages with detailed pin configurations and electrical characteristics provided in the data sheet.
| Supply Voltage Range (single‑supply) | +1.8 V to +5.5 V |
|---|---|
| Crosstalk (1 MHz) | -80 dB |
| Leakage Current (typical at +25 °C) | 0.25 nA |
They can operate from a single supply of +1.8 V to +5.5 V or dual supplies of +2.5 V.
Crosstalk is -80 dB at 1 MHz.