Datasheet > MC33972TEW/R2

MC33972TEW/R2

更新时间： 2024-09-27 12:19:43

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	1433K
描述
Multiple Switch Detection Interface with Suppressed Wake-up

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MC33972TEW/R2 数据手册

Document Number: MC33972

Rev. 16.0, 10/2009

Freescale Semiconductor

Technical Data

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 5.5 V ≤ V_PWR≤ 26 V

Device

Package

Range (T )

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

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

• Selectable wake-up on change of state

MC33972DWB/R2

MC33972EW/R2

• Selectable wetting current (16 or 2.0 mA)

MCZ33972EW/R2

MCZ33972AEW/R2

MC33972TDWB/R2

MC33972TEW/R2

MCZ33972TEW/R2

MCZ33972AEK/R2

• 8 programmable inputs (switches to battery or ground)

• 14 switch-to-ground inputs

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

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

• Pb-free packaging designated by suffix code EW

• Exposed pad packaging designated by suffix code EK

32 SOICW

-40°C to 125°C

32 SOICW EP

VDD

POWER SUPPLY

VBAT

LVI

33972

SP0

SP1

VPWR

VDD

VBAT

ENABLE

VDD

SP7

WAKE

SG0

SG1

MCU

MOSI

SCLK

MISO

INT

SCLK

INT

WATCHDOG

RESET

SG12

SG13

AMUX

AN0

GND

Figure 1. 33972 Simplified Application Diagram

Freescale Semiconductor, Inc. reserves the right to change the detail specifications,

as may be required, to permit improvements in the design of its products.

12 3 4 5 6 7...32

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与MC33972TEW/R2相关器件

型号	品牌	获取价格	描述	数据表
MC33972TEWR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up
MC33975	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current
MC33975ATEK	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32 mA Wetting Current
MC33975ATEK	NXP	获取价格	Switch Detection Interface, 22-switches, 32mA Suppressed Wakeup, 3.3 V / 5.0 V SPI , SOIC
MC33975ATEK/R2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32 mA Wetting Current
MC33975ATEKR2	NXP	获取价格	Switch Detection Interface, 22-switches, 32mA Suppressed Wakeup, 3.3 V / 5.0 V SPI , SOIC
MC33975EK	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32mA Wetting Current
MC33975EK/R2	NXP	获取价格	SPECIALTY INTERFACE CIRCUIT, PDSO32, 5.70 X 4.60 MM, 0.65 MM PITCH, LEAD FREE, SOIC-32
MC33975EKR2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-up and 32mA Wetting Current
MC33975R2	FREESCALE	获取价格	Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current

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