The MAX4620/MAX4630/MAX4640 are low-voltage, high-ESD-protected, quad, single-pole/single-throw (SPST) analog switches that can replace the industry-standard 74HC4066 analog switch. The switches are protected against ±15kV electrostatic discharge (ESD) without latchup or damage. Each switch can handle Rail-to-Rail® analog signals and is suitable for low-distortion audio applications and current switching in automated test equipment. The switches have low power requirements, small board space, and higher reliability compared to mechanical relays. They operate from a +2V to +12V single supply, making them ideal for battery-powered applications. The switches have a maximum on-resistance of 70Ω, matched between switches to 0.5Ω (typ), and flat (2Ω(typ)) over the specified signal range. The MAX4620 has four normally open (NO) switches, the MAX4630 has four normally closed (NC) switches, and the MAX4640 has two NO and two NC switches.
The MAX4620, MAX4630, and MAX4640 are low‑voltage, high‑ESD‑protected quad SPST CMOS analog switches that are pin‑compatible replacements for the 74HC4066. They feature +15 kV ESD protection, rail‑to‑rail operation from +2 V to +12 V, and low off‑leakage (0.5 nA at 25 °C). These devices are suited for battery‑powered systems, audio/video signal routing, data‑acquisition, and relay replacement.
Key electrical characteristics include a typical on‑resistance of 70 Ω max at 5 V (2 Ω typ flatness), on‑resistance matching of 0.5 Ω typ, a -3 dB bandwidth greater than 300 MHz, and low distortion of 0.015 %. The parts are offered in 14‑pin TSSOP, SO, and DIP packages.
| ESD protection (Human Body Model) | +15 kV |
|---|---|
| Off‑leakage current | 0.5 nA at 25 °C |
| Supply voltage range | +2 V to +12 V |
| Power consumption | 0.5 pW |
| -3 dB bandwidth | >300 MHz |
| Total harmonic distortion | 0.015 % |
| Package options | 14‑pin TSSOP, SO, DIP |
They are rated for +15 kV Human Body Model, +15 kV IEC 1000‑4‑2 Air‑Gap, and +8 kV IEC 1000‑4‑2 Contact discharge.
They operate from a single supply of +2 V to +12 V.
The off‑leakage current is guaranteed at 0.5 nA at 25 °C.