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24-Channel Automotive Switch Monitor

Monitor the Status of 24 Automotive Switches with a Single Microcontroller
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The MAX13362 is a 24-channel automotive contact monitor designed as an interface between mechanical switches and low-voltage processors or other logic circuits. The IC operates over a voltage range of 5.5V to 28V, and withstands voltages up to 40V. It protects low-voltage circuitry from high voltages and reverse battery conditions. The MAX13362's low-current operation under all operating conditions makes it suitable for use in electronic control units (ECUs) that are connected directly to the automotive battery. It has an adjustable scan mode that significantly reduces the current drawn in key-off.

The MAX13362 features an SPI™ interface to monitor the switch status and set the device configuration. Multiple MAX13362s can be cascaded to support any multiple of 24 switches.

The MAX13362 is available in a 6mm x 6mm, 40-pin thin QFN package and operates over the -40°C to +125°C temperature range.

Data Sheet

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An evaluation board is available: MAX13362EVKIT

Key Features

  • 9V to 18V Operating Voltage Range with Full Performance
  • Fully Functional Range of 5.5V to 28V
  • Switch Inputs Withstand 27V
  • Switch Inputs Withstand Reverse Battery
  • Ultra-Low Operating Current 100µA (typ) in Scan Mode
  • Built-In Switching Hysteresis
  • Built-In Switch Deglitching
  • CMOS-Compatible Logic Outputs Down to 3.0V
  • Interrupt Output to Processor
  • Configurable Wetting Current (0mA, 5mA, 10mA or 15mA) for Each Switch Input
  • AEC-Q100 Qualified


  • Automotive Body Controllers
  • Automotive Door Modules
  • Automotive Smart Junction Boxes

Key Specifications:

Switch/Contact Monitors
Part Number Functions Switch Inputs Switch Input Threshold
Switch Input Threshold Hysteresis
Output Polarity ESD Protect.
min max max See Notes
MAX13362  Contact Monitor 24 2.5 to 3.7 0.2 Active High 8 5.5 28 100 $2.19 @1k
See All Switch/Contact Monitors (4)

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.


MAX13362: Typical Application Circuit
Typical Application Circuit

More Information

New Product Press Release   2009-08-05 ]

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Information Index

Document Ref.: 19-4464 Rev 0; 2009-02-18
This page last modified: 2010-03-17