The MAX4901~MAX4905 switches feature negative signal capability that allows signals below ground to pass through without distortion. The MAX4901/MAX4902 are a dual SPST (single-pole/single-throw) and the MAX4903/MAX4904/MAX4905 are a single SPDT (single-pole/double-throw) configuration. These analog switches operate from a single +1.8V to +5.5V supply and have low 0.6Ω on-resistance, making them ideal for switching audio signals. The MAX4905 includes a comparator that can be used for headphone detection or mute/send key function. The MAX4902/MAX4904/MAX4905 have internal shunt resis- tors to automatically discharge any capacitance at the NO_ and NC connection points. This reduces click-and-pop sounds that occur when switching audio signals between pre-charged points. A break-before-make fea- ture and auto-discharge also help to reduce popping. These SPST and SPDT switches are available in space-saving 8-pin TDFN and 9-bump UCSP™ pack- ages and operate over the -40°C to +85°C extended temperature range.
The MAX4901‑MAX4905 family are low‑on‑resistance analog switches that operate from a single +1.8 V to +5.5 V supply. The devices support negative‑signal capability, break‑before‑make switching and, for the MAX4905, an integrated comparator for headphone or mute detection. They are offered in space‑saving 8‑pin TDFN and 9‑bump UCSP packages and are rated for -40 °C to +85 °C.
The datasheet provides absolute maximum ratings, detailed electrical characteristics, dynamic switching parameters, pin descriptions, and package drawings. It also includes application notes on shunt‑resistor operation, comparator thresholds, and recommended power‑supply sequencing for reliable operation.
| Supply Voltage Range | 1.8 V to 5.5 V |
|---|---|
| Typical On‑Resistance | 0.6 Ω (typ) |
| Operating Temperature Range | -40 °C to +85 °C |
| Shunt Resistor Presence | Yes for MAX4902, MAX4904, MAX4905 |
| Comparator Included | Only MAX4905 |
| Package Types | 8‑pin TDFN and 9‑bump UCSP |
They operate from a single +1.8 V to +5.5 V supply.
The MAX4905 includes an integrated comparator for headphone or mute detection.
The typical on‑resistance is 0.6 Ω.
They are offered in 8‑pin TDFN and 9‑bump UCSP packages.