The MAX13362 is a 24-channel automotive contact monitor designed as an interface between mechanical switches and low-voltage microcontrollers or other logic circuits. It features an SPI interface to monitor individual switch inputs and to configure interrupt capability, wetting current, switch configuration (battery-connected or ground-connected), polling time and polling active time. Any switch status change will cause an interrupt signal if the switch is interrupt enabled. The MAX13362 has three modes of operation: continuous mode, polling mode, and shutdown mode.

Applications

Automotive Body Controllers
Automotive Door Modules
Automotive Smart Junction Boxes

The MAX13362 applies a programmable wetting current to any closed switch to clean switch contacts that are exposed to adverse conditions. The wetting current for each switch can be set to 0mA, 5mA, 10mA, or 15mA by the W_.0 and W_.1 data bits in the command registers by means of an SPI data transaction.

Read the Application Note: How the MAX13362 Automotive Switch Monitor Performs During ECU-level Testing

Read more: http://datasheets.maxim-ic.com/en/ds/MAX13362.pdf