The MAX4621/MAX4622/MAX4623 are precision, dual, high-speed analog switches. The single-pole/single-throw (SPST) MAX4621 and double-pole/single-throw (DPST) MAX4623 dual switches are normally open (NO). The single-pole/double-throw (SPDT) MAX4622 has two normally closed (NC) and two NO poles. All three parts offer low 5Ω on-resistance guaranteed to match to within 0.5Ω between channels and to remain flat over the full analog signal range (∆0.5Ω max). They also offer low leakage (<500pA at +25°C, <5nA at +85°C) and fast switching times (turn-on time <250ns, turn-off time <200ns). These analog switches are ideal in low-distortion appli- cations and are the preferred solution over mechanical relays in automatic test equipment or applications where current switching is required. They have low power requirements, use less board space, and are more reliable than mechanical relays. The MAX4621/MAX4622/MAX4623 are pin-compatible replacements for the DG401/DG403/DG405, respective- ly, offering improved overall performance. These mono- lithic switches operate from a single positive supply (+4.5V to +36V) or with bipolar supplies (±4.5V to ±18V) while retaining CMOS-logic input compatibility.
The MAX4621, MAX4622, and MAX4623 are precision dual‑channel analog switches with a low on‑resistance of 3 Ω typical (5 Ω max) and a guaranteed channel‑to‑channel match of 0.5 Ω. They feature low leakage (<5 nA at +85 °C), fast switching (turn‑on <250 ns, turn‑off <200 ns), and are compatible with TTL/CMOS logic levels. These devices replace reed relays in test equipment, communication systems, audio routing, and data‑acquisition applications.
The switches operate from a single supply of +4.5 V to +36 V or bipolar supplies of ±4.5 V to ±18 V, with an operating temperature range of –40 °C to +85 °C. They are offered in 16‑pin narrow SO and plastic DIP packages.
| On‑Resistance (typ) | 3 Ω |
|---|---|
| On‑Resistance (max) | 5 Ω |
| Channel‑to‑Channel RON Match | 0.5 Ω max |
| Off‑Channel Leakage (at +85 °C) | <5 nA |
| Turn‑On Time | <250 ns |
| Turn‑Off Time | <200 ns |
| Single‑Supply Voltage Range | +4.5 V to +36 V |
| Bipolar‑Supply Voltage Range | ±4.5 V to ±18 V |
| Package Pin Count | 16 pins |
The typical on‑resistance is 3 Ω (maximum 5 Ω).
They can run from a single supply of +4.5 V to +36 V or from bipolar supplies of ±4.5 V to ±18 V.
Off‑channel leakage is guaranteed to be less than 5 nA at +85 °C.
Turn‑on time is less than 250 ns and turn‑off time is less than 200 ns.