Datasheet > MC33972DWB/R2

MC33972DWB/R2

更新时间： 2024-02-14 00:51:10

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		/
页数	文件大小	规格书
28页	506K
描述
Multiple Switch Detection Interface with Suppressed Wake-Up

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MC33972DWB/R2 数据手册

Freescale Semiconductor, Inc.

Document order number: MC33972

Rev 3.0, 12/2004

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Advance Information

33972

Multiple Switch Detection Interface

with Suppressed Wake-Up

The 33972 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 microprocessor unit

(MCU) through a serial peripheral interface (SPI). The device also features a

22-to-1 analog multiplexer for reading inputs as analog. The analog input

signal is buffered and provided on the AMUX output terminal for the MCU to

read.

MULTIPLE SWITCH

DETECTION INTERFACE WITH

SUPPRESSED WAKE-UP

The 33972 device has two modes of operation, Normal and Sleep. Normal

mode allows programming of the device and supplies switch contacts with

pullup or pulldown current as it monitors switch change of state. The Sleep

mode provides low quiescent current, which makes the 33972 ideal for

automotive and industrial products requiring low sleep state currents.

DWB SUFFIX

EW (Pb-FREE) SUFFIX

CASE 1324-02

Features

• Designed to Operate 5.5 V ≤ V_PWR≤ 26 V

• Switch Input Voltage Range -14 V to V_PWR, 40 V Max

32-TERMINAL SOICW

• Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI Protocol

• Selectable Wake-Up on Change of State

• Selectable Wetting Current (16 mA or 2.0 mA)

• 8 Programmable Inputs (Switches to Battery or Ground)

• 14 Switch-to-Ground Inputs

ORDERING INFORMATION

Temperature

Device

Package

Range (T )

MC33972DWB/R2

MC33972EW/R2

32 SOICW

-40°C to 125°C

• V_PWRStandby Current 100 µA Typical, V_DDStandby Current 20 µA

Typical

• Active Interrupt (INT) on Change-of-Switch State

• Pb-Free Packaging Designated by Suffix Code EW

Simplified Application Diagram

33972 Simplified Application Diagram

BAT

Power Supply

LVI

33972

BAT

Enable

SP0

SP1

PWR

Watchdog

Reset

MCU

BAT

SP7

WAKE

SCLK

MOSI

SCLK

SG0

SG1

MISO

INT

AMUX

AN0

SG12

SG13

GND

This document contains information on a new product.

Specifications and information herein are subject to change without notice.

For More Information On This Product,

Go to: www.freescale.com

12 3 4 5 6 7...28

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与MC33972DWB/R2相关器件

型号	品牌	获取价格	描述	数据表
MC33972DWBR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33972EW	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33972EW	MOTOROLA	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33972EW/R2	MOTOROLA	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33972EW/R2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up
MC33972EWR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33972T	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33972TDWB	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33972TDWB/R2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up
MC33972TDWBR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up

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