The MAX4667/MAX4668/MAX4669 dual analog switches feature low on-resistance of 2.5Ω max. On-resistance is matched between switches to 0.5Ω max and is flat (0.5Ω max) over the specified signal range. Each switch can handle Rail-to-Rail® analog signals. The off-leakage cur- rent is only 5nA max at +85°C. These analog switches are ideal in low-distortion applications and are the pre- ferred 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 MAX4667 has two normally closed (NC) switches, the MAX4668 has two normally open (NO) switches, and the MAX4669 has one NC and one NO switch that guarantee break-before-make operation. These switches operate from a +4.5V to +36V single supply or from ±4.5V to ±20V dual supplies. All digital inputs have +0.8V and +2.4V logic thresholds, ensuring TTL/CMOS-logic compatibility when using ±15V sup- plies or a single +12V supply. Applications include reed relay replacement, PBX, PABX systems, test equipment, audio-signal routing, communication systems, and avionics.
The MAX4667, MAX4668, and MAX4669 are dual CMOS analog switches with low on‑resistance (2.5 Ω max) and matched channels (0.5 Ω max). They support rail‑to‑rail signal handling, low off‑leakage (5 nA max at +85 °C), and are suited for low‑distortion applications such as test equipment and audio‑signal routing.
The devices operate from a +4.5 V to +36 V single‑supply or +4.5 V to +20 V dual‑supply, feature TTL/CMOS‑compatible logic inputs (+0.8 V/+2.4 V thresholds), and include ESD protection (>2 kV). The MAX4669 provides break‑before‑make operation. Detailed pin descriptions, absolute maximum ratings, and electrical characteristics are included.
| On‑Resistance (max) | 2.5 Ω |
|---|---|
| On‑Resistance Match (max) | 0.5 Ω |
| Off‑Leakage Current (max at +85 °C) | 5 nA |
| Supply Voltage Range – Single Supply | +4.5 V to +36 V |
| Supply Voltage Range – Dual Supply | +4.5 V to +20 V |
| Break‑Before‑Make (MAX4669) | Yes |
| ESD Protection | >2 kV |
The maximum on‑resistance is 2.5 Ω.
They operate from +4.5 V to +36 V with a single supply or from +4.5 V to +20 V with dual supplies.
Only the MAX4669 provides break‑before‑make operation.
The off‑leakage current is limited to 5 nA max at +85 °C.