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MCZ33884

Freescale Semiconductor
Part Number MCZ33884
Manufacturer Freescale Semiconductor
Description Switch Monitor Interface
Published Aug 4, 2007
Detailed Description www.DataSheet4U.com Freescale Semiconductor Technical Data Document Number: MC33884 Rev. 4.0, 11/2006 Switch Monitor ...
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MCZ33884
MCZ33884


Overview
www.
DataSheet4U.
com Freescale Semiconductor Technical Data Document Number: MC33884 Rev.
4.
0, 11/2006 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 33884 SWITCH MONITOR INTERFACE DW SUFFIX EG (PB-FREE) SUFFIX 98ASB42344B 24-PIN SOICW • Full Operation with 7.
0 V < VPWR < 26 V, Limited Operation with ORDERING INFORMATION 5.
5 V < VPWR < 7.
0 V Temperature • Input Voltage Range: -14 V to 40 V Device Package Range (TA) • Interface Directly to Microprocessors Using SPI Protocol • Wake Up on Change of Monitored Switch Status MC33884DW/R2 -40°C to 105°C 24 SOICW • Programmable Wetting Current MCZ33884EG/R2 • 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 µA • Reset Input Defaults the Device to Sleep Mode • Pb-Free Packaging Designated by Suffix Code EG VPWR 33884 2 VPWR Sense Inputs SB1 SB2 SP1 SP2 SP3 SP4 SG1 SG2 SG3 SG4 SG5 SG6 VPWR VDD CS SI SO SCLK INT RESET GND VBG SYNC MASL VDD MCU VDD CS MOSI MISO CLK INT RESET GND 4 GND / VPW...


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