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MC33972 Datasheet PDF

Part Series:
MC33972 Series
Category:
Power Management
Description:
Switch Detection Interface, 22-switches with Suppressed Wakeup, 3.3V / 5V SPI , SOIC 32
Updated Time: 2023/01/13 02:50:51 (UTC + 8)

MC33972 Datasheet PDF Power Management

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MULTIPLE SWITCH DETECTION INTERFACE

MC33972ATEWR2 Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Number of Pins
32 Pin
Case/Package
SOIC-32
Halogen Free Status
Halogen Free
Number of Positions
32 Position
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MC33972ATEWR2 Function Overview

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
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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
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