MC33972ATEK

专用接口, SPI, 计算机, 工业控制, 电信, 5.5 V, 26 V, HSOIC, 32 引脚

Overview

The ® 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

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## 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