MC33972ATEK Datasheet PDF - NXP

●Overview

●The NXP® MC33972 multiple switch detection interface with suppressed wake-up is designed to detect the closing and opening of up to 22 switch contacts.

● The switch status, either open or closed, is transferred to the MCU through a SPI

● Features a 22-to-1 analog multiplexer for reading inputs as analog. The analog input signal is buffered and provided on the AMUX output pin for the MCU to read

● Two modes of operation:

● Normal: allows programming of the device and supplies switch contacts with pull-up or pull-down current monitoring switch change of state

● Sleep: provides low quiescent current, making MC33972 ideal for automotive and industrial products requiring low sleep state currents

●MoreLess

●## Features

● Interfaces directly to microprocessor using 3.3 V / 5.0 V SPI protocol

● Selectable wake-up on change of state

● Eight programmable inputs (switches to battery or ground)

● Fourteen switch-to-ground inputs

● Active Interrupt (INT) on change-of-switch state

● Switch Voltage Range -14 – VPWR

● Operating Voltage 5.5 V – 26 V (VPWR)

● This product is included in NXP®.s product longevity program, with assured supply for a minimum of 15 years after launch

●## Features