MC33972A FREESCALE [Freescale Semiconductor, Inc], MC33972A Datasheet
MC33972A
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MC33972A Summary of contents
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Freescale Semiconductor 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 switch contacts. The switch status, either open or ...
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DEVICE VARIATIONS Table 1. Device Variations Device 33972 33972A 33972 2 DEVICE VARIATIONS Switch Input Voltage Range - - Reference Location Analog Integrated Circuit Device Data Freescale Semiconductor ...
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V V PWR PWR 16.0 2 SP0 SP1 4.0V 2.0 16.0 Ref mA mA SP2 SP3 SP4 V V PWR PWR SP5 16.0 2 SP6 SP7 4.0V 2.0 16.0 Ref PWR PWR ...
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PIN CONNECTIONS GND SCLK SP0 5 SP1 6 SP2 7 Exposed Pad SP3 8 EK Suffix SG0 9 Only SG1 10 SG2 11 SG3 12 SG4 13 SG5 14 SG6 15 VPWR 16 EK ...
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Table 3. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device. Ratings ELECTRICAL RATINGS VDD Supply Voltage (1) SI, SO, SCLK, , AMUX CS, ...
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics Characteristics noted under conditions 3.1V ≤ V noted. Where applicable, typical values reflect the parameter’s approximate average value with V (7) Characteristic POWER INPUT Supply Voltage Supply ...
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Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions 3.1V ≤ V noted. Where applicable, typical values reflect the parameter’s approximate average value with V (7) Characteristic DIGITAL INTERFACE (11) Input Logic Voltage Thresholds SCLK, SI, Tri-state SO Input ...
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ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 3.1V ≤ V Where applicable, typical values reflect the parameter’s approximate average value with V Characteristic SWITCH INPUT Pulse Wetting Current Time Interrupt ...
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CS 0 LEAD 0.7 V SCLK DD 0 SI(SU SO(EN VPWR VDD WAKE INT CS SGn Tri-State Sleep Power-Up ...
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FUNCTIONAL DESCRIPTION INTRODUCTION The 33972 device is an integrated circuit designed to provide systems with ultra-low quiescent sleep / wake-up modes, and a robust interface between switch contacts and a microprocessor. The 33972 replaces many of the discrete components required ...
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WAKE-UP (WAKE) The WAKE pin is an open-drain output and a wake-up input. The pin is designed to control a power supply Enable pin. In the Normal Mode, the pin is LOW. In the Sleep WAKE Mode, the pin is ...
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FUNCTIONAL DESCRIPTION FUNCTIONAL INTERNAL BLOCK DESCRIPTION FUNCTIONAL INTERNAL BLOCK DESCRIPTION MC33972 - Functional Block Diagram Control & Protection Interface & Control Control & Protection Figure 7. Functional Internal Block Description CONTROL AND PROTECTION CIRCUITRY: The 33972 is designed to operate ...
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FUNCTIONAL DEVICE OPERATION MCU INTERFACE DESCRIPTION The 33972 device directly interfaces to a 3.3V or 5.0V microcontroller unit (MCU). SPI serial clock frequencies up to 6.0MHz may be used for programming and reading switch input status (production tested at 4.16MHz). ...
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FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES POWER SUPPLY The 33972 is designed to operate from 5.5V to 40V on the VPWR pin. Characteristics are provided from 8.0V to 16V for the device. Switch contact currents and the internal logic supply are ...
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Table 7. Wake-up / Interrupt Command Wake-up /Interrupt Command WETTING CURRENT REGISTER The 33972 has two ...
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FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES TRI-STATE REGISTER The tri-state command is use to set the SPn or SGn input node as high-impedance (Table 10). By setting the tri-state register bit to logic [1], the input will be high-impedance regardless of ...
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CALIBRATION OF TIMERS In cases where an accurate time base is required, the user may calibrate the internal timers using the calibration command (Table 13). After the 33972 device receives the calibration command, the device expects 512μs logic [0] calibration ...
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FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES RESET The reset command resets all registers to Power-ON Reset (POR) state. Refer to Table 15, page 18, for POR Table 14. Reset Command Reset Command ...
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Table 16. Serial Output (SO) Bit Data Type of Input SP SG Table 17. Serial Output (SO) Response Register them int SO Response Will SP7 SP6 SP5 SP4 Always Send flg flg EXAMPLE OF NORMAL MODE OPERATION The operation of ...
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FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES Table 19. Interrupt Timer Bits 543 Interrupt Period 000 32ms 001 64ms 010 128ms 011 256ms 100 512ms 101 1.024s 110 2.048s 111 No interrupt wake-up The scan timer sets the polling period between input ...
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The 33972’s primary function is the detection of open or closed switch contacts. However, there are many features that allow the device to be used in a variety of applications. The following is a list of applications to consider for ...
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TYPICAL APPLICATIONS INTRODUCTION 33972 V BAT SP0 VPWR SP1 V VDD V BAT SP7 WAKE SI SG0 SCLK V V SG1 PWR PWR 2 INT 1 2.0mA SG12 AMUX PWR PWR ...
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VBAT V V PWR PWR 16 mA 1.5kΩ SG0 100kΩ 4.0V Ref V V PWR PWR 16 mA SP0 PWR PWR 16 mA SG13 4.0V Ref Figure 15. MOSFET or LED Driver Output The sequence of ...
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TYPICAL APPLICATIONS INTRODUCTION from first device is connected second device). With two devices, 48 clock pulses are required to shift data in. When the WAKE feature is used to enable the power supply, both WAKE pins should ...
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V BAT V 33972 BAT V SP0 SP1 V VDD BAT SP7 WAKE SG0 SG1 SCLK AMUX SG12 SG13 Figure 16. Power Supply Active in Sleep Mode V BAT V 33972 BAT V SP0 SP1 V WAKE BAT SP7 SG0 ...
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PACKAGING PACKAGE DIMENSIONS For the most current package revision, visit www.freescale.com and perform a keyword search using the 98A listed below. 33972 26 PACKAGING PACKAGE DIMENSIONS DWB SUFFIX EW SUFFIX (Pb-FREE) 32-LEAD SOIC WIDE BODY 98ARH99137A ISSUE B Analog Integrated ...
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Analog Integrated Circuit Device Data Freescale Semiconductor PACKAGE DIMENSIONS (CONTINUED) DWB SUFFIX EW SUFFIX (Pb-FREE) 32-LEAD SOIC WIDE BODY 98ARH99137A ISSUE B PACKAGING PACKAGE DIMENSIONS (CONTINUED) 33972 27 ...
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PACKAGING PACKAGE DIMENSIONS (CONTINUED) 33972 28 EK SUFFIX (Pb-FREE) 32-LEAD SOIC WIDE BODY EXPOSED PAD 98ASA10556D ISSUE D Analog Integrated Circuit Device Data Freescale Semiconductor ...
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Analog Integrated Circuit Device Data Freescale Semiconductor EK SUFFIX (Pb-FREE) 32-LEAD SOIC WIDE BODY EXPOSED PAD 98ASA10556D ISSUE D PACKAGING PACKAGE DIMENSIONS (CONTINUED) 33972 29 ...
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PACKAGING PACKAGE DIMENSIONS (CONTINUED) 33972 30 EK SUFFIX (Pb-FREE) 32-LEAD SOIC WIDE BODY EXPOSED PAD 98ASA10556D ISSUE D Analog Integrated Circuit Device Data Freescale Semiconductor ...
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... R2 to the ordering information. • Updated to the current Freescale form and style 11/2007 11.0 • Added MC33972AEK/R2 to the ordering information. • Included device specific information relevant to the EK suffix on pages 27, and 28. • Added sentence to • Made calculation corrections to • Corrected Device Variation Table on page 2. ...
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How to Reach Us: Home Page: www.freescale.com Web Support: http://www.freescale.com/support USA/Europe or Locations Not Listed: Freescale Semiconductor, Inc. Technical Information Center, EL516 2100 East Elliot Road Tempe, Arizona 85284 +1-800-521-6274 or +1-480-768-2130 www.freescale.com/support Europe, Middle East, and Africa: Freescale Halbleiter ...