The MAX333 is a quad single‑pole‑double‑throw (SPDT) analog switch that can be operated with bipolar power supplies ranging from +5V to +18V, or with single‑ended supplies of +10V to +30V. It features break‑before‑make switching (200 ns typical), a maximum turn‑off time of 50 ns, and a maximum turn‑on time of 1000 ns. Quiescent current is only about 250 µA when all inputs are high, making it suitable for portable applications.
Key features include four independent SPDT switches, TTL and CMOS compatible logic inputs, no separate logic supply required, and low‑power CMOS design. The device is recommended for use in Winchester disk drives, test equipment, communications systems, PBX/PABX, head‑up displays, and portable instruments. For over‑voltage protection, external 1N4001 or 1N914 diodes should be placed in series with the supplies.
| Dual‑Supply Voltage Range | +5 V to +18 V |
|---|---|
| Single‑Supply Voltage Range | +10 V to +30 V |
| Quiescent Current (all inputs high) | ≈250 µA max |
| Break‑before‑make Switching Time | ≈200 ns (typical) |
| Turn‑off Time | ≤50 ns |
| Turn‑on Time | ≤1000 ns |
| Input Voltage High | 24 V |
| Input Voltage Low | 0 V |
It can operate from +5 V to +18 V with dual supplies, or from +10 V to +30 V with a single supply.
The device provides a typical break‑before‑make time of about 200 ns.
The quiescent current is approximately 250 µA maximum when all inputs are high.
Use 1N4001 or 1N914 type diodes in series with the positive and negative supplies.