Maxim’s MAX4655–MAX4658 are medium-voltage CMOS analog switches with low on-resistance of 10Ω max, specifically designed to handle large switch cur- rents. With a switch capability of up to 400mA peak cur- rent and 300mA continuous current (MAX4655/ MAX4656), and up to 300mA peak current and 150mA continuous current (MAX4657/MAX4658), these parts can switch loads as low as 25Ω. They can replace reed relays with a million times the speed and virtually unlim- ited number of lifetime cycles. Normal power consump- tion is only 3mW, whether the switch is on or off. These parts are TTL/CMOS compatible and will switch any voltage within its power-supply range. These are SPST (single-pole/single-throw) switches. The MAX4655/MAX4657 are normally closed (NC), while the MAX4656/MAX4658 are normally open (NO). The difference between the MAX4655/MAX4656 and the MAX4657/MAX4658 is in the power dissipation of their packages. Refer to the Absolute Maximum Ratings and the Electrical Characteristics. The MAX4655–MAX4658 power-supply range is from ±4.5V to ±20V for dual-supply operation and +9V to +40V for single-supply operation. These switches can operate from any combination of supplies, within a 40V V+ to V- range. They conduct equally well in either direc- tion and can handle rail-to-rail analog signals. The off- leakage current is only 1nA max at TA = +25°C. They are available in 8-pin µMAX®, TDFN, and SO packages, with exposed paddle options for high-power application
The MAX4655–MAX4658 family are medium‑voltage CMOS analog switches designed for high‑current applications. They are SPST devices with low on‑resistance (10 Ω max) and can handle up to 400 mA peak and 300 mA continuous current, making them suitable for relay replacement, test equipment, and communication systems.
The datasheet provides absolute maximum ratings, electrical characteristics, dynamic performance, pin descriptions, and package dimensions. It also includes typical operating curves, leakage currents, charge injection data, and recommended over‑voltage protection methods.
| On‑Resistance (RON) | 10 Ω max |
|---|---|
| Supply Voltage Range (dual) | ±4.5 V to ±20 V |
| Supply Voltage Range (single) | +9 V to +40 V |
| Off‑Leakage Current | 1 nA max at 25 °C |
| Power Consumption | 3 mW |
The devices operate from ±4.5 V to ±20 V with dual supplies, or from +9 V to +40 V with a single supply.
Normal power consumption is only about 3 mW regardless of the switch state.
The off‑leakage current is limited to 1 nA max at 25 °C.