Serially Controlled, Low-Voltage, 8-Channel SPST Switch


The MAX395 8-channel, serially controlled, single-pole/single-throw (SPST) analog switch offers eight separately controlled switches. The switches conduct equally well in either direction. On-resistance (100Ω max) is matched between switches to 5Ω max and is flat (10Ω max) over the specified signal range.

These CMOS devices can operate continuously with dual power supplies ranging from ±2.7V to ±8V or a single supply between +2.7V and +16V. Each switch can handle rail-to-rail analog signals. The off leakage current is only 0.1nA at +25°C or 5nA at +85°C.

Upon power-up, all switches are off, and the internal shift registers are reset to zero. The MAX395 is electrically equivalent to two MAX391 quad switches controlled by a serial interface, and is pin compatible with the MAX335.

The serial interface is compatible with SPI™/QSPI™ and MICROWIRE™. Functioning as a shift register, it allows data (at DIN) to be clocked in synchronously with the rising edge of clock (SCLK). The shift register's output (DOUT) enables several MAX395s to be daisy chained.

All digital inputs have 0.8V to 2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±5V supplies or a single +5V supply.
MAX395: Functional Diagram MAX395: Functional Diagram Enlarge+

Key Features

  • SPI/QSPI, MICROWIRE-Compatible Serial Interface
  • 8 Separately Controlled SPST Switches
  • 100Ω Signal Paths with ±5V Supplies
  • Rail-to-Rail Signal Handling
  • Asynchronous active-low RESET Input
  • Pin Compatible with Industry-Standard MAX335
  • ±2.7V to ±8V Dual Supplies
  • +2.7V to +16V Single Supply
  • > 2kV ESD Protection per Method 3015.7
  • TTL/CMOS-Compatible Inputs (with +5V or ±5V Supplies)


  • Audio-Signal Routing
  • Automated Test Equipment (ATE)
  • Avionics
  • Industrial and Process Control Systems
  • Networking
  • Serial Data-Acquisition Systems
Part Number Config. Channels Normal Position VSUPPLY (Single)
VSUPPLY (Single)
Dynamic Range (max)
min max min max min max max max typ max max min max See Notes
MAX395  SPST 8 Open 2.7 16 2.7 8 -8 16 16 100 10 10 0.1 400 400 10 8 2 $3.80 @1k
See All Switches and Multiplexers (Low Voltage) (169)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Quality and Environmental Data

Product Reliability Reports: MAX395.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

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