參數(shù)資料
型號(hào)： MC33975TEK
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 1/32頁(yè)
文件大?。?/td> 0K
描述： IC SWITCH DETECT MULT 32-SOIC
標(biāo)準(zhǔn)包裝： 42
應(yīng)用： 開關(guān)監(jiān)控
接口： SPI 串行
封裝/外殼： 32-SSOP（0.295"，7.50mm 寬）裸露焊盤
供應(yīng)商設(shè)備封裝： 32-SOICW 裸露焊盤
包裝： 管件
安裝類型： 表面貼裝
Document Number: MC33975
Rev 11.0, 01/2014
Freescale Semiconductor
Technical Data
Freescale Semiconductor, Inc., 2005 - 2014. All rights reserved.
Multiple Switch Detection
Interface with Suppressed
Wake-up and 32 mA Wetting
Current
The 33975 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 33975 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 the switch
change of state. The Sleep mode provides low quiescent current,
which makes the 33975 ideal for automotive and industrial products
requiring low sleep state currents.
Improvements are a programmable interrupt timer for Sleep mode that
can be disabled, switch detection currents of 32 mA and 4.0 mA for
switch-to-ground inputs, and an interrupt bit that can be reset. This
device is powered using SMARTMOS technology.
Features
Designed to operate from 5.5 V
VPWR 28 V
Switch input voltage: (33975: -14 to 38 V) (33975A: -14 to 40 V)
Interfaces to microprocessor using 3.3 V/5.0 V SPI protocol
Selectable wake-up on change of state
14 switch-to-ground inputs
8 programmable inputs (switches to battery or ground)
Selectable wetting current (32 mA or 4.0 mA for switch-to-ground
inputs)
Sleep State current VPWR 100 A, VDD 20 A
Figure 1. 33975 Simplified Application Diagram
EK SUFFIX (PB-FREE)
98ASA10556D
32-PIN SOICW EP
33975
33975A
MULTIPLE SWITCH
DETECTION INTERFACE WITH
SUPPRESSED WAKE-UP
Applications
Automotive systems
Industrial control systems
Process control systems
Security systems
Systems requiring switch status verification for
safety, operation, or process control purposes
V
BAT
SP0
SP1
SP7
SG0
SG1
SG12
SG13
VPWR
VDD
WAKE
SI
CS
SO
INT
AMUX
GND
MOSI
SCLK
CS
MISO
INT
AN0
33975
MCU
SCLK
POWER SUPPLY
LVI
ENABLE
WATCHDOG
RESET
VDD
V
BAT
VDD
V
BAT
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC33975TEKR2 功能描述:接口 - 專用 MULTI SW DETECT INTERFACE RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59
MC33981ABHFK 功能描述:電源開關(guān) IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5
MC33981ABHFKR2 功能描述:電源開關(guān) IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5
MC33981BHFK 功能描述:電源開關(guān) IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5
MC33981BHFKR2 功能描述:電源開關(guān) IC - 配電 HF 4.0MOHM RDSON SWITCH RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時(shí)間（最大值）:400 us 關(guān)閉時(shí)間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5
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