MAX4510/MAX4520 is a single-pole single-throw (SPST) fault-protected analog switch with a fault-protected input and Rail-to-Rail® signal-handling capability. The switch's normally open (NO) and normally closed (NC) terminals are protected from overvoltage faults up to 36V during power-on and 44V with power off. During a fault condi- tion, the switch input terminal (NO or NC) becomes an open circuit; only nanoamperes of leakage current flow from the fault source, and the switch output (COM) fur- nishes up to 13mA of the appropriate polarity supply voltage to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends. On-resistance is 160Ω max. The off-leakage current is only 0.5nA at +25°C and 10nA at +85°C. The MAX4510 is a normally closed switch, while the MAX4520 is a normally open switch. These CMOS switches operate with dual power supplies ranging from ±4.5V to ±20V or a single supply between +9V and +36V. The digital input has +0.8V and +2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±15V or a single +12V supply. The MAX4510/ MAX4520 are available in 6-pin SOT23 and 8-pin µMAX packages. Applications include Data Acquisition, Industrial and Process-Control Systems, Avionics, ATE Equipment, Redundant/Backup Systems. Features include ±40V Fault Protection with Power Off, ±36V Fault Protection with ±15V Supplies, Switch is Off with Power Removed, Rail-to-Rail Signal Handling, 160Ω max Signal Paths with ±15V Supplies.
The MAX4510 and MAX4520 are single‑pole/single‑throw (SPST) CMOS analog switches with fault‑protected inputs and rail‑to‑rail signal handling. The MAX4510 is normally closed, while the MAX4520 is normally open, and both support dual supplies (±4.5 V to ±20 V) or a single supply (+9 V to +36 V).\n\nKey features include low on‑resistance (160 Ω max), ultra‑low off‑leakage (0.5 nA at 25 °C), and the ability to source or sink up to 13 mA during a fault condition. The devices are offered in 6‑pin SOT‑23 and 8‑pin µMAX packages and are suitable for data acquisition, industrial control, avionics, and test equipment.
| On‑Resistance (R_ON) max | 160 Ω |
|---|---|
| Off‑Leakage Current (typical) | 0.5 nA at 25 °C |
| Supply Voltage Range (dual) | ±4.5 V to ±20 V |
| Supply Voltage Range (single) | +9 V to +36 V |
| Output Current in Fault | 13 mA |
| Package Options | 6‑pin SOT‑23, 8‑pin µMAX |
The off‑leakage current is 0.5 nA at 25 °C.
Dual supplies from ±4.5 V to ±20 V or a single supply from +9 V to +36 V.
The on‑resistance is specified as a maximum of 160 Ω.