The MAX4631/MAX4632/MAX4633 high-voltage, dual analog switches are pin compatible with the industry-standard DG401/DG403/DG405. They upgrade the existing devices with fault-protected inputs and Rail-to-Rail® signal handling capabilities.
The MAX4631, MAX4632, and MAX4633 are high‑voltage, dual analog switches that provide fault‑protected inputs and rail‑to‑rail signal handling. They are pin‑compatible with the industry‑standard DG401/DG403/DG405 and can operate from dual supplies (±4.5 V to ±18 V) or a single supply (+9 V to +36 V).
Key features include on‑resistance as low as 85 Ω (max) at +25 °C, off‑leakage currents of 0.5 nA, TTL‑ and CMOS‑compatible input thresholds, and fault protection up to ±36 V (±25 V for MAX4632) with power on and ±40 V with power off. Applications span ATE equipment, data acquisition, industrial control, avionics, and redundant systems.
| On‑Resistance (RON) max | 85 Ω |
|---|---|
| Off‑Leakage Current (typical) | 0.5 nA |
| Dual‑supply voltage range | ±4.5 V to ±18 V |
| Single‑supply voltage range | +9 V to +36 V |
| Continuous current into any terminal | ±30 mA |
| Input logic high threshold | 2.4 V |
| Input logic low threshold | 0.8 V |
The off‑leakage current is typically 0.5 nA at +25 °C.
Yes, the input thresholds are TTL‑compatible, with low‑level at 0.8 V and high‑level at 2.4 V.