Datasheet > MCZ33972TEW

MCZ33972TEW

更新时间： 2024-11-02 11:04:11

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		接口集成电路光电二极管
页数	文件大小	规格书
32页	1303K
描述
Multiple Switch Detection Interface with Suppressed Wake-Up

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MCZ33972TEW 数据手册

Document Number: MC33972

Rev 15, 8/2008

Freescale Semiconductor

Advance Information

Multiple Switch Detection

Interface with Suppressed

Wake-Up

33972/A/T

MULTIPLE SWITCH

DETECTION INTERFACE

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 pin for the MCU to read.

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

Normal Mode allows programming of the device and supplies switch

contacts with pull-up or pull-down 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 SUFFIX (Pb-FREE)

98ARH99137A

EK SUFFIX (Pb-FREE)

98ASA10556D

32-PIN SOICW EP

32-PIN SOICW

ORDERING INFORMATION

Features

Temperature

• Designed to operate 5.5V ≤ V_PWR≤ 26V

Device

Package

Range (T )

• Switch input voltage range -14V to V_PWR, 40V Max

• Interfaces directly to MPU using 3.3V/5.0V SPI protocol

• Selectable wake-up on change of state

MC33972DWB/R2

MC33972EW/R2

• Selectable wetting current (16mA or 2.0mA)

• 8 programmable inputs (switches to battery or ground)

• 14 switch-to-ground inputs

• Typical standby current - V_{PWR =}100μA and V_DD= 20μA

• Active interrupt (INT) on change-of-switch state

• Pb-free packaging designated by suffix code EW

• Exposed pad packaging designated by suffix code EK

MCZ33972EW/R2

MCZ33972AEW/R2

MC33972TDWB/R2

MC33972TEW/R2

MCZ33972TEW/R2

MCZ33972AEK/R2

32 SOICW

-40°C to 125°C

32 SOICW EP

VDD

POWER SUPPLY

LVI

V_BAT

33972

SP0

SP1

VPWR

VDD

V_BAT

ENABLE

VDD

SP7

WAKE

SG0

SG1

MCU

MOSI

SCLK

WATCHDOG

RESET

SCLK

SG12

SG13

MISO

INT

AMUX

AN0

GND

Figure 1. 33972 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...32

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与MCZ33972TEW相关器件

型号	品牌	获取价格	描述	数据表
MCZ33972TEW/R2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up
MCZ33972TEWR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MCZ33975AEK	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32mA Wetting Current
MCZ33975AEKR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32mA Wetting Current
MCZ33975EK	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32mA Wetting Current
MCZ33975EKR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32mA Wetting Current
MCZ33976EG	FREESCALE	获取价格	Dual Gauge Driver with Configurable esponse Time
MCZ33976EG/R2	FREESCALE	获取价格	Dual Gauge Driver with Configurable Response Time
MCZ33976EGR2	FREESCALE	获取价格	Dual Gauge Driver with Configurable esponse Time
MCZ33977EG	FREESCALE	获取价格	Single Gauge Driver

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