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33884

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 Cu...

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SeekIC No. : 004228592 Detail

33884: 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...

33884 Data Sheet

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Part Number:
33884
Supply Ability:
5000

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  • 1~5000
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Product Details

Description



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


Pinout

Connection Diagram


Specifications

All voltages are with respect to ground unless otherwise noted.
Rating Symbol Value Unit
Power Supply Voltage
CS, SI, SO, SCLK, RST, MASL, SYNC, INT (1)		 VDD -0.3 to 7.0 VDC
VPWR Supply Voltage (1) VPWR -16 to 50 VDC
Switch Input Voltage Range VSI -14 to 40 VDC
Recommended Frequency of SPI Operation fSPI 3.0 MHz
ESD Voltage (2)
Human Body Model (3) (4)
Machine Model (3) (5)		 VESD1
VESD2		 4000
200		 V
Storage Temperature TSTG -55 to 150
Operating Case Temperature TC -40 to 105
Operating Junction Temperature TJ -40 to 150
Peak Package Reflow Temperature During Reflow (6), (7) TPPRT Note 7.
Thermal Resistance (Junction-to-Ambient) PJ-A 107 /W

Notes
1Exceeding these limits may cause malfunction or permanent damage to the device.

2ESD data available upon request.

3ESD1 testing is performed in accordance with the Human Body Model (CZAP=100 pF, RZAP=1500 ) and ESD2 testing is performed in accordance with the Machine Model (CZAP=200 pF, RZAP=0 ).

4All pins are tested individually.

51 kV on VPWR and VDD when connected together. See page three.

6Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may cause malfunction or permanent damage to the device.

7.Freescale's Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow Temperature and Moisture Sensitivity Levels (MSL),

Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics.



Description

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.




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