Date: 06/08/2009

Maxim’s 24-channel switch-contact monitor for automotive applications

Maxim has made available the MAX13362, a 24-channel switch-contact monitor for automotive switches. This MAX13362 enables a single microcontroller to monitor up to 24 mechanical switches distributed throughout the automobile that eliminates the expense of multiple remote microcontrollers.

MAX13362 protects low-voltage circuitry from high voltages 27V, and reverse-battery conditions, making it suitable for monitoring remote mechanical switches that are exposed to adverse conditions. And also offers three modes of operation (continuous, polling, and shutdown) to optimize power consumption. The MAX13362 is ideal for automotive body controllers and door modules.

An SPI interface provides multiple programming options. Users can configure polling time and polling active time to conserve power between monitoring events. They can also program wetting current, interrupt capability, and switch configuration (i.e., battery connected or ground connected). The programmable wetting current (0mA to 15mA) is applied to any closed switch to clean switch contacts that are exposed to adverse conditions.

Operating temperature: -40°C to +125°C
Package: 6.0mm x 6.0mm, 40-pin TQFN package.
Price: Starts at $2.26 for 1k pieces.
Availability: Upon request.
For more details visit: www.maxim-ic.com.