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What is 33975?

This electronic component, produced by the manufacturer "Freescale Semiconductor", performs the same function as "Multiple Switch Detection Interface".


33975 Datasheet PDF - Freescale Semiconductor

Part Number 33975
Description Multiple Switch Detection Interface
Manufacturers Freescale Semiconductor 
Logo Freescale Semiconductor Logo 


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Technical Data
Document order number: MC33975
Rev 4.0, 08/2005
Multiple Switch Detection
Interface with Suppressed
Wake-Up and 32mA Wetting
Current
Freescale offers multiple Switch Detection Interface Devices. 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.
33975
33975A
MULTIPLE SWITCH
DETECTION INTERFACE WITH
SUPPRESSED WAKE-UP
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 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.
EK Suffix (Pb-Free)
98ARL10543D
32-TERMINAL SOICW EP
Features
ORDERING INFORMATION
• Designed to Operate 5.5 V VPWR 28 V
• Switch Input Voltage Range -14 V to VPWR
• Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI
Protocol
• Selectable Wake-Up on Change of State
Device
MC33975EK/R2
PC33975AEK/R2
Temperature
Range (TA)
-40°C to 125°C
Package
32 SOICW-EP
• Selectable Wetting Current (32 mA or 4.0 mA for switch-to-ground
inputs)
• 8 Programmable Inputs (Switches to Battery or Ground)
• 14 Switch-to-Ground Inputs
• VPWR Standby Current 100 µA Typical, VDD Standby Current 20 µA Typical
• Pb-free 32-terminal suffix EK
VDD
VBAT
VBAT
VBAT
33975
SP0 VPWR
SP1
VDD
SP7
SG0
SG1
SG12
WAKE
SI
SCLK
CS
SO
INT
AMUX
VDD
Power Supply
LVI
Enable
Watchdog
Reset
MCU
MOSI
SCLK
CS
MISO
INT
AN0
SG13
GND
Figure 1. 33975 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2005. All rights reserved.

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33975 equivalent
MAXIMUM RATINGS
MAXIMUM RATINGS
Table 3. Maximum Ratings
All voltages are with respect to ground unless otherwise noted. Exceeding these limits may cause malfunction or permanent
damage to the device.
Rating
Symbol
Value
Unit
ELECTRICAL RATINGS
VDD Supply Voltage
CS, SI, SO, SCLK, INT, AMUX
WAKE
VPWR Supply Voltage
Switch Input Voltage Range
MC33975
PC339775A
Frequency of SPI Operation (VDD = 5.0 V)
ESD Voltage (1)
Human Body Model (2)
Applies to all non-input terminals
Machine Model
Charge Device Model
Corner Terminals
Interior Terminals
VESD
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 40
-0.3 to 50
-14 to 38
-14 to 40
6.0
±4000
±2500
±200
750
500
VDC
VDC
VDC
VDC
VDC
MHz
V
THERMAL RATINGS
Operating Temperature
Ambient
Junction
Case
Storage Temperature
Power Dissipation (3)
Thermal Resistance
Junction to Ambient
Between the Die and the Exposed Die Pad (4)
TA
TJ
TC
TSTG
PD
RθJA
RθJC
-40 to 125
-40 to 150
-40 to 125
-55 to 150
1.7
71
1.2
°C
°C
W
°C/W
Peak Package Reflow Temperature During Solder Mounting (5)
TSOLDER
245
°C
Notes
1. ESD testing is performed in accordance with the Human Body Model (CZAP = 100 pF, RZAP = 1500 ), the Machine Model (CZAP = 200
pF, RZAP = 0 ), and the Charge Device Model.
2. All Programmable Switches (SP) and Switch-to-Ground (SG) input terminals when tested individually.
3. Maximum power dissipation at TJ =150°C junction temperature with no heatsink used.
4. Thermal resistance between the die and the exposed die pad.
5. Terminal 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.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33975
5


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1. - Multiple Switch Detection Interface

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