FUNCTIONAL INTERNAL BLOCK DESCRIPTION FUNCTION" />
參數(shù)資料
型號(hào)： MCZ33972EWR2
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 4/32頁(yè)
文件大?。?/td> 0K
描述： IC SWITCH DETECTION MULT 32-SOIC
標(biāo)準(zhǔn)包裝： 1,000
應(yīng)用： 開(kāi)關(guān)監(jiān)控
接口： SPI
電源電壓： 8 V ~ 26 V
封裝/外殼： 32-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 32-SOIC
包裝： 帶卷 (TR)
安裝類型： 表面貼裝
Analog Integrated Circuit Device Data
12
Freescale Semiconductor
33972
FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
Figure 7. Functional Internal Block Description
CONTROL AND PROTECTION CIRCUITRY:
The 33972 is designed to operate from 5.5 V to 38/40 V on
the VPWR terminal. Characteristics are provided for VPWR
from 8.0 to 26 V for the IC (parametric tests are done from 8.0
to 16.0v). Switch contact currents and the internal logic
supply are generated from the VPWR terminal. The VDD
supply terminal is used to set the SPI communication voltage
levels, current source for the SO driver, and pull-up current
on INT and CS.
The on-chip voltage regulator and bandgap supplies the
required voltages to the internal monitor circuitry. The
temperature monitor is active in the Normal mode.
INTERFACE AND CONTROL:
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 33972 device has two modes
of operation, Normal and Sleep.
SWITCH PROGRAMMABLE INPUTS:
Programmable switch detection inputs. These 8 inputs can
selectively detect switch closures to Ground or Battery. The
33972 device has 8 switch inputs capable of being
programmed to read switch-to-ground or switch-to-battery
contacts. The input is compared with a 4.0 V reference.
When programmed to be switch-to-battery, voltages greater
than 4.0 V are considered closed. Voltages less than 4.0 V
are considered open. The opposite holds true when inputs
are programmed as switch-to-ground.
SWITCH–TO-GROUND INPUTS:
Switch detection interface inputs. These 14 inputs can
detect switch closures to ground only. The input is compared
with a 4.0 V reference. Voltages greater than 4.0 V are
considered open. Voltages less than 4.0 V are considered
closed. Note: Each of these inputs may be used to supply
current to sensors external to a module.
MC33972 - Functional Block Diagram
Switch Programmable
Inputs
SP0 - SP7
Control & Protection
Voltage Regulation
Bandgap
Interface & Control
Multiplex Control
Control & Protection
SW-GND Inputs
Interface & Control
Switch–to-Ground
Inputs
SG0 - SG13
Oscillator & Clock
Temp. Sense
Interrupt/Wake-up
SPI Interface
SW Prog Inputs
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCZ33972TEW 制造商:Freescale Semiconductor 功能描述:MULTI-SW DETECT W/SUPRES - Bulk
MCZ33972TEW/R2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Multiple Switch Detection Interface with Suppressed Wake-up
MCZ33972TEWR2 制造商:Freescale Semiconductor 功能描述:MULTI-SW DETECT W/SUPRES - Tape and Reel
MCZ33975AEK 功能描述:輸入/輸出控制器接口集成電路 ENHANCED MULTI SW DETECT RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray
MCZ33975AEKR2 功能描述:接口 - 專用 ENHANCED MULTI SW DETECT 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
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