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參數(shù)資料
| 型號(hào)： | MC33884DW |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SWITCH SDI MONITOR 24-SOIC |
| 標(biāo)準(zhǔn)包裝： | 30 |
| 系列： | * |
| 應(yīng)用： | * |
| 接口： | * |
| 電源電壓： | * |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
Document Number: MC33884
Rev. 4.0, 11/2006
Freescale Semiconductor
Technical Data
Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as
may be required, to permit improvements in the design of its products.
Freescale Semiconductor, Inc., 2006. All rights reserved.
Switch Monitor Interface
The 33884 Switch Monitor Interface is a monolithic silicon integrated
circuit (IC) to perform switch monitoring functions. The device provides
efficient interface between electrical switches and low voltage
microprocessors. The 33884 supplies switch contact pull-up and pull
down current while monitoring the input voltage level. All inputs are
protected for transients when implemented with an appropriate static
discharge capacitor used on the inputs.
There are four modes of operation: Sleep, Normal, Polling, and
Polling + INT Timer.
The Polling and Timer modes are similar, except the Timer mode
has the addition of an interrupt that is sent to the microprocessor if a
switch is sensed closed, or upon the internal interrupt timer times out.
An interrupt is ultimately sent to the microprocessor. All modes of
operation are easily programmed via the Serial Peripheral Interface
(SPI) control.
Features
Full Operation with 7.0 V < VPWR < 26 V, Limited Operation with
5.5 V < VPWR < 7.0 V
Input Voltage Range: -14 V to 40 V
Interface Directly to Microprocessors Using SPI Protocol
Wake Up on Change of Monitored Switch Status
Programmable Wetting Current
Four Switch-to-Ground Switches
Six (Fixed Function) Inputs Monitoring Six Switch-to-Ground
Switches
Two (Fixed Function) Inputs Monitoring Two Switch-to-Battery Switches
Quiescent Current in Sleep Mode < 10 A
Reset Input Defaults the Device to Sleep Mode
Pb-Free Packaging Designated by Suffix Code EG
Figure 1. 33884 Simplified Application Diagram
SWITCH MONITOR INTERFACE
DW SUFFIX
EG (PB-FREE) SUFFIX
98ASB42344B
24-PIN SOICW
33884
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33884DW/R2
-40°C to 105°C
24 SOICW
MCZ33884EG/R2
6 GND
Sense Inputs
4 GND / VPWR
Sense Inputs
2 VPWR
Sense Inputs
33884
VDD
MOSI
MISO
CLK
GND
VDD
VPWR
MCU
SG1
SG2
SG3
SG4
SG5
SG6
SP1
SP2
SP3
SP4
VDD
CS
SI
SO
SCLK
INT
SYNC
MASL
RESET
GND
VBG
SB1
SB2
VPWR
CS
INT
RESET
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