The MAX4644 is a single-pole/double-throw (SPDT) switch that operates from a single supply ranging from +1.8V to +5.5V. It provides low 4Ω on-resistance (RON) as well as 1Ω RON flatness over the entire analog-signal range. The MAX4644 offers fast switching times of less than 20ns while ensuring break-before-make operation. It typically consumes only 0.01μW of quiescent power, making it suitable for use in low-power, portable applications. The MAX4644’s features include low leakage currents over the entire temperature range, TTL/CMOS-compatible digital logic, and excellent AC characteristics. It is packaged in either a small 8-pin μMAX® or a tiny 6-pin SOT23.
The MAX4644 is a single‑pole/double‑throw (SPDT) analog switch that operates from a single supply ranging from +1.8 V to +5.5 V. It offers a guaranteed on‑resistance of 4 Ω (max) at a +5 V supply, low leakage (<0.35 nA), and fast break‑before‑make switching under 20 ns. The device is packaged in either an 8‑pin μMAX® or a 6‑pin SOT‑23 package and is suited for low‑power portable equipment, audio/video routing, data‑acquisition, and communication circuits.
Electrical characteristics, pin descriptions, typical operating curves, and package information are provided, along with application notes on over‑voltage protection and ESD handling. Ordering information and RoHS‑compliant package options are listed at the end of the document.
| Supply Voltage Range | +1.8 V to +5.5 V |
|---|---|
| On‑Resistance (RON) | 4 Ω max (+5 V supply) |
| Switching Time | < 20 ns |
| Quiescent Power Consumption | 0.01 µW typical |
| Leakage Current | < 0.35 nA |
The MAX4644 operates from a single supply ranging from +1.8 V to +5.5 V.
The device guarantees an on‑resistance of up to 4 Ω at a +5 V supply.
The MAX4644 switches in less than 20 ns and provides break‑before‑make operation.
Typical quiescent power consumption is 0.01 µW.