Details, datasheet, quote on part number: MC33972
DescriptionMulti SW Detect Interface W/suppressed Wake-up
CompanyMotorola Semiconductor Products
DatasheetDownload MC33972 datasheet
Find where to buy


Features, Applications

Advance Information Multiple Switch Detection Interface with Suppressed Wake-Up

The 33972 Multiple Switch Detection Interface with Suppressed Wake-Up is designed to detect the closing and opening 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 analog input signal is buffered and provided on the AMUX output pin for the MCU to read.


The 33972 device has two modes of operation, Normal and Sleep. Normal mode allows programming of the device and supplies switch contacts with pullup or pull-down current as it monitors switch change of state. The Sleep mode provides low quiescent current, which makes the 33972 ideal for automotive and industrial products requiring low sleep state currents. Note The 33972 is similar to the 33993 device, with the exception that the programmable interrupt timer for the 33972's Sleep mode can be disabled (refer to the section entitled Sleep Mode on page 18).


Designed to Operate 5.5 V VPWR 26 V Switch Input Voltage Range V to VPWR, 40 V Max Interfaces Directly to Microprocessor Using V/5.0 V SPI Protocol Selectable Wake-Up on Change of State Selectable Wetting Current or 2.0 mA) 8 Programmable Inputs (Switches to Battery or Ground) 14 Switch-to-Ground Inputs VPWR Standby Current 100 A Typical, VDD Standby Current 20 A Typical Active Interrupt (INT) on Change-of-Switch State

Device MC33972DWB/R2 Temperature Range (TA) to 125C Package 32 SOICW

This document contains information on a new product. Specifications and information herein are subject to change without notice. Motorola, Inc. 2003

5.0 V VPWR V SPI Ref mA Comparator mA SP0 VPWR VPWR, VDD, 5.0 V POR Bandgap Sleep PWR VPWR VDD GND


Pin Name GND SI SCLK SG06, SG137 VPWR WAKE INT AMUX VDD SO Formal Name Ground SPI Slave In Serial Clock Chip Select Programmable Switches 07 Switch-to-Ground Inputs 013 Battery Input Wake-Up Interrupt Analog Multiplex Output Voltage Drain Supply SPI Slave Out Description Ground for logic, analog, and switch to battery inputs. SPI control data input pin from MCU to 33972. SPI control clock input pin. SPI control chip select input pin from MCU to 33972. Logic 0 allows data to be transferred in. Programmable switch-to-battery or switch-to-ground input pins. Switch-to-ground input pins. Battery supply input pin. Pin requires external reverse battery protection. Open drain wake-up output. Designed to control a power supply enable pin. Open-drain output to MCU. Used to indicate input switch change of state. Analog multiplex output. 3.3/5.0 V supply. Sets SPI communication level for SO driver. Provides digital data from 33972 to MCU.



Some Part number from the same manufacture Motorola Semiconductor Products
MC33982 Intelligent High Current Self-protected Hi-side Switch
MC33984 Dual Intelligent High-current Self-protected Silicon High-side Switch
MC33989 System Base Chip With High Speed CAN
MC33989DW MC33989 System Basis Chip With High Speed CAN Transceiver
MC33990 J1850 Serial Transceiver With Enhanced Ground
MC33990D Enhanced Class B Serial Transceiver
MC33991 Dual Gauge Driver Integrated Circuit
MC33991DW Gauge Driver Integrated Circuit
MC33993 22-MULTIPLE Switch Detection Interface
MC33993DWB MC33993
MC33996 16-Output Switch With Spi Controlthe 33996 is a 16-output Low-side Switch With a 24-bit Serial Input Control. It is Designed For ...
MC33997 3.3/5.0V Switching Power Supply
MC33997DW Switching Power Supply With Linear Regulators
MC33998 2.6/5.0V Switching Power Supply
MC33998DW Switching Power Supply With Linear Regulators
MC33999 16-Output Switch With Spi And PWM Control
MC3399DW Automotive Half-amp High-side Switch
MC34001 JFET Input Operational Amplifiers
MC34012-1 Telephone Tone Ringer

MC44724A : Digital Video Encoders - Y/cr/cb And RGB Output

MC68HC001CFN8R2 :

MC74F353N : Dual 4-input Multiplexer With 3-state Outputs

MPXV2053GP : Compensated MPX2053 50 Kpa On-chip Compensated And Calibrated Silicon Pressure Sensors

MCP4161T-502E/SN : MCP414X/416X/424, 7/8-Bit Single/Dual SPI Digital POT with Non-Volatile Memory The MCP41/42XX devices are non-volatile, 7-bit (129 wiper steps) digital potentiometers that are programmed/reprogrammed through an SPI compatible interface. The MCP41/42XX devices offer a variety of configurations simpl

MPC5534AZQ66R2 : Microcontroller

MC8641DTHX1000G : Integrated Host Processor Hardware Specifications

MR0S08AVTS35C : 64K x 16-bit 3.3-v Asynchronous Magnetoresistive RAM

PPC7448THX1267NX : Hardware Specifications Addendum for the Mc7448t Xxnnnnmx Series

PPC7457RX600NB : Ppc7457rx1000nb

Same catergory

AD7710 : CMOS, 24-Bit Signal Conditioning ADC With Current Source. Charge Balancing ADC 24 Bits No Missing Codes 0.0015% Nonlinearity Two-Channel Programmable Gain Front End Gains from to 128 Differential Inputs Low-Pass Filter with Programmable Filter Cutoffs Ability to Read/Write Calibration Coefficients Bidirectional Microcontroller Serial Interface Internal/External Reference Option Single or Dual Supply Operation.

CD4527BE : Drivers/Multipliers. ti CD4527B, CMOS BCD Rate Multiplier. Data sheet acquired from Harris Semiconductor SCHS080C Revised July 2003 The CD4527B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes). .

M5M5V416BTP-70HI : . Regarding the change of names mentioned in the document, such as Mitsubishi Electric and Mitsubishi XX, to Renesas Technology Corp. The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory.

HA17324AT : Quad Operational Amplifier. HA17324A series are quad operational amplifier that provide high gain and internal phase compensation, with single power supply. They can be widely used to control equipments. Wide range of supply voltage, and single power supply used Internal phase compensation Wide range of common mode voltage, and possible to operate with an input about 0 V Low electro-magnetic.

1537-10K : Molded Unshielded RF Coils. Military s MS # Issued Physical Parameters Inches Length 0.010 Diameter 0.010 Lead Size AWG #22 TCW 0.002 Lead Length 0.12 Current Rating at 90C Ambient LT4K 35C Rise LT10K 15C Rise Operating Temperature Range to +105C Maximum Power Dissipation 0.134 W Weight Max. (Grams) 0.9 For in-between values, see Series 511 (page 43) Packaging Tape.

GESD1060 : NPN Epitaxial Planar Transistor. The GESD1060 is designed for relay drivers, high-speed inverters, converters and other general large-current switching. Low Collector-Emitter Saturation Voltage : VCE (sat) =0.4V (Max.) IC=3A, IB=0.3A, Parameter Collector to Base Voltage Collector to Emitter Voltage Emitter to Base Voltage Collector Current Collector Current (Pulse) Total Device Dissipation.

1555282 : Round Accessory Industrial Controls, Meter; CABLE 17POS M12 PLUG-WIRE 5M. s: Cable Type: Round ; Connector Type: Circular 17 pos Male to Wire Leads ; Length: 16.40' (5m) ; Color: Black ; Usage: Panel Mount, Industrial ; Shielding: Unshielded ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant.

AP4D207TZBE : Pushbutton Switches 4 NT Blk Cap Blu LED Thread Bush Sold Lug. The C&K Components AP Series Sealed Industrial Pushbutton Switch is ideal for harsh environments, off-road, industrial, medical, transportation, gaming, and military applications. The IP67 sealed Industrial Pushbutton Switch from C&K Components has a life cycle of a million and is available.

QYX1H124JTP : 0.12F Film Capacitor Radial; CAP FILM 0.12UF 50VDC RADIAL. s: Capacitance: 0.12F ; Tolerance: 5% ; Dielectric Material: Polyester ; Package / Case: Radial ; Packaging: Bulk ; Lead Spacing: 0.197" (5.00mm) ; ESR (Equivalent Series Resistance): - ; Mounting Type: Through Hole ; : General Purpose ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant.

M3UFK-3418R : Socket to Card Edge Rectangular Cable Assembly 1.50' (457.20mm) Polarizing Key, Strain Relief (Socket); Flange (Card Edge); IDC CABLE - MKS34K/MC34M/MCF34K. s: Connector Type: Socket to Card Edge ; Number of Positions: 34 ; Contact Finish: Gold ; Number of Rows: 2 ; : Polarizing Key, Strain Relief (Socket); Flange (Card Edge) ; Color: Multiple, Ribbon.

LTC4441MPMSE#PBF : Pmic - Mosfet, Bridge Driver - External Switch Integrated Circuit (ics) Non-Inverting Tube 6A 5 V ~ 25 V; IC MOSFET DRIVER N-CH 10-MSOP. s: Configuration: Low-Side ; Voltage - Supply: 5 V ~ 25 V ; Current - Peak: 6A ; Delay Time: 36ns ; Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad ; Packaging: Tube ; Number of Outputs: 1 ; Input.

OSTTS21A15A : Free Hanging (In-Line) Terminal Block - Headers, Plug And Socket Connectors, Interconnect Plug, Female Sockets; TERM BLOCK PLUG 7.5MM 21POS. s: Terminal Block Type: Plug, Female Sockets ; Positions Per Level: 21 ; Pitch: 0.295" (7.50mm) ; Number of Levels: 1 ; Header Orientation: - ; Plug Wire Entry: 90 ; Termination: Screw ; Wire Gauge: 12-24 AWG ; Current:.

MPC5GD : LED Panel Mount Indicators Grn 565nm 70mcd Diff Lens Wire. BIVAR Nylon, Metal, Quick Mount, & IP67-Rated Panel Mount Indicators are designed to address machine to human communication, in which light is transferred from LED to the human eye to convey a message. This wide variety of indicator solutions is made to efficiently move light to the front panel.

0-1241434-1 : 13 CONTACT(S), MALE, STRAIGHT TWO PART BOARD CONNECTOR, SOLDER. s: Connector Type: TWO PART BOARD CONNECTOR ; Gender: Male ; Termination Types: SOLDER ; Number of Contacts: 13.

325-20 : 325 mm2, RING TERMINAL. s: Terminal Type: Ring Terminal ; Material: NOT SPECIFIED ; North American: 600 AWG ; International: 325 mm2.

0-C     D-L     M-R     S-Z