Please enter a valid full or partial manufacturer part number with a minimum of 3 letters or numbers

    M40SZ100W Search Results

    SF Impression Pixel

    M40SZ100W Price and Stock

    STMicroelectronics M40SZ100WMQ6F

    IC SUPERVISOR 1 CHANNEL 16SO
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey M40SZ100WMQ6F Reel 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $4.52985
    		Buy Now
    M40SZ100WMQ6F Cut Tape 1,686 1
    • 1 $8.29
    • 10 $7.492
    • 100 $6.2024
    • 1000 $4.70408
    • 10000 $4.70408
    		Buy Now
    M40SZ100WMQ6F Digi-Reel 1
    • 1 $8.29
    • 10 $7.492
    • 100 $6.2024
    • 1000 $4.70408
    • 10000 $4.70408
    		Buy Now
    Avnet Americas M40SZ100WMQ6F Reel 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $4.81275
    		Buy Now
    M40SZ100WMQ6F Reel 24 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $4.81275
    		Buy Now
    Mouser Electronics M40SZ100WMQ6F 4,646
    • 1 $8.29
    • 10 $7.5
    • 100 $6.21
    • 1000 $4.71
    • 10000 $4.52
    		Buy Now
    Verical M40SZ100WMQ6F 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $4.394
    		Buy Now
    Arrow Electronics M40SZ100WMQ6F 2,500 24 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $4.394
    		Buy Now
    Newark M40SZ100WMQ6F Bulk 2,470 1
    • 1 $9.58
    • 10 $8.76
    • 100 $7.4
    • 1000 $6.56
    • 10000 $6.56
    		Buy Now
    M40SZ100WMQ6F Reel 2,500
    • 1 $5.02
    • 10 $5.02
    • 100 $5.02
    • 1000 $5.02
    • 10000 $5.02
    		Buy Now
    STMicroelectronics M40SZ100WMQ6F 4,646 1
    • 1 $8.12
    • 10 $7.35
    • 100 $6.09
    • 1000 $5.3
    • 10000 $5.3
    		Buy Now
    Bristol Electronics M40SZ100WMQ6F 35 1
    • 1 $6.72
    • 10 $4.368
    • 100 $3.36
    • 1000 $3.36
    • 10000 $3.36
    		Buy Now
    M40SZ100WMQ6F 10
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Get Quote
    Quest Components M40SZ100WMQ6F 1,196
    • 1 $8.094
    • 10 $8.094
    • 100 $8.094
    • 1000 $4.047
    • 10000 $4.047
    		Buy Now
    M40SZ100WMQ6F 28
    • 1 $9
    • 10 $4.5
    • 100 $4.5
    • 1000 $4.5
    • 10000 $4.5
    		Buy Now
    M40SZ100WMQ6F 8
    • 1 $15
    • 10 $10
    • 100 $10
    • 1000 $10
    • 10000 $10
    		Buy Now
    Avnet Silica M40SZ100WMQ6F 2,500 17 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Buy Now
    EBV Elektronik M40SZ100WMQ6F 25 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Buy Now

    STMicroelectronics M40SZ100WMQ6E

    IC SUPERVISOR 1 CHANNEL 16SO
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey M40SZ100WMQ6E Tube
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Buy Now

    STMicroelectronics M40SZ100WMQ6FTR

    Processor Supervisor 3V/5V 16-Pin SOIC T/R - Tape and Reel (Alt: M40SZ100WMQ6FTR)
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Avnet Americas M40SZ100WMQ6FTR Reel 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Get Quote

    M40SZ100W Datasheets (14)

    Part ECAD Model Manufacturer Description Curated Type PDF
    M40SZ100W STMicroelectronics NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100W STMicroelectronics NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100WMH STMicroelectronics 5V or 3V NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100WMH6 STMicroelectronics 5V or 3V NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100WMH6TR STMicroelectronics 5V or 3V NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100WMQ STMicroelectronics 5V or 3V NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100WMQ6 STMicroelectronics 5V or 3V NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100WMQ6 STMicroelectronics 5V or 3V NVRAM supervisor for LPSRAM Original PDF
    M40SZ100WMQ6E STMicroelectronics 5V or 3V NVRAM supervisor for LPSRAM Original PDF
    M40SZ100WMQ6E STMicroelectronics PMIC - Supervisors, Integrated Circuits (ICs), IC SRAM SUPERVSR 16-SOIC Original PDF
    M40SZ100WMQ6F STMicroelectronics 5V or 3V NVRAM supervisor for LPSRAM Original PDF
    M40SZ100WMQ6F STMicroelectronics PMIC - Supervisors, Integrated Circuits (ICs), IC SUPERVISOR NVRAM 3V 16SOIC Original PDF
    M40SZ100WMQ6TR STMicroelectronics 5V or 3V NVRAM SUPERVISOR FOR LPSRAM Original PDF
    M40SZ100WSH STMicroelectronics 5V or 3V NVRAM SUPERVISOR FOR LPSRAM Original PDF

    M40SZ100W Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    Untitled

    Abstract: No abstract text available
    Text: M40SZ100Y M40SZ100W 5 V or 3 V NVRAM supervisor for LPSRAM Features • Convert low power SRAMs into NVRAMs ■ 5 V or 3 V operating voltage ■ Precision power monitoring and power switching circuitry ■ Automatic write-protection when VCC is out-oftolerance


    Original     		PDF M40SZ100Y M40SZ100W M40SZ100Y: M40SZ100W: 28-lead

    M40SZ100W

    Abstract: M40SZ100Y SOH28 SOIC16 SOIC28
    Text: M40SZ100Y M40SZ100W NVRAM SUPERVISOR for LPSRAM PRELIMINARY DATA FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 3V OR 5V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN VCC is OUT-OF-TOLERANCE


    Original     		PDF M40SZ100Y M40SZ100W M40SZ100Y: M40SZ100W: 28LEAD M40SZ100W M40SZ100Y SOH28 SOIC16 SOIC28

    2001 NVRAM

    Abstract: M40SZ100W M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28
    Text: M40SZ100Y M40SZ100W 5V OR 3V NVRAM SUPERVISOR FOR LPSRAM FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 5V OR 3V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN VCC IS OUT-OF-TOLERANCE


    Original     		PDF M40SZ100Y M40SZ100W 16-pin M40SZ100Y: M40SZ100W: 28LEAD 28-pin 2001 NVRAM M40SZ100W M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28

    M40SZ100W

    Abstract: M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28
    Text: M40SZ100Y M40SZ100W 5V or 3V NVRAM SUPERVISOR FOR LPSRAM FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 5V OR 3V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN VCC IS OUT-OF-TOLERANCE


    Original     		PDF M40SZ100Y M40SZ100W 16-pin M40SZ100Y: M40SZ100W: 28LEAD 28-pin M40SZ100W M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28

    Untitled

    Abstract: No abstract text available
    Text: M40SZ100W 3 V NVRAM supervisor for LPSRAM Datasheet - production data Description The M40SZ100W NVRAM controller is a selfcontained device which converts a standard lowpower SRAM into a non-volatile memory. A precision voltage reference and comparator monitors the VCC input for an out-of-tolerance


    Original     		PDF M40SZ100W M40SZ100W DocID007528

    NVRAM

    Abstract: M40SZ100W M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28
    Text: M40SZ100Y M40SZ100W 5V OR 3V NVRAM SUPERVISOR FOR LPSRAM FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 5V OR 3V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN VCC IS OUT-OF-TOLERANCE


    Original     		PDF M40SZ100Y M40SZ100W 16-pin M40SZ100Y: M40SZ100W: 28LEAD 28-pin NVRAM M40SZ100W M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28

    Untitled

    Abstract: No abstract text available
    Text: M40SZ100Y M40SZ100W 5V or 3V NVRAM SUPERVISOR FOR LPSRAM PRELIMINARY DATA FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 5V OR 3V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN


    Original     		PDF M40SZ100Y M40SZ100W 16-pin M40SZ100Y: M40SZ100W: 28LEAD 28-LEAD

    Untitled

    Abstract: No abstract text available
    Text: M40SZ100Y M40SZ100W 5V or 3V NVRAM SUPERVISOR FOR LPSRAM FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 5V OR 3V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN VCC IS OUT-OF-TOLERANCE


    Original     		PDF M40SZ100Y M40SZ100W 16-pin M40SZ100Y: M40SZ100W: 28LEAD 28-LEAD

    13May

    Abstract: M40SZ100W M40SZ100Y M4Z28-BR00SH M4Z32-BR00SH SOH28 SOIC16 SOIC28
    Text: M40SZ100Y M40SZ100W 5 V or 3 V NVRAM supervisor for LPSRAM Features • Convert low power SRAMs into NVRAMs ■ 5 V or 3 V operating voltage ■ Precision power monitoring and power switching circuitry ■ Automatic write-protection when VCC is out-oftolerance


    Original     		PDF M40SZ100Y M40SZ100W M40SZ100Y: M40SZ100W: 28-lead 13May M40SZ100W M40SZ100Y M4Z28-BR00SH M4Z32-BR00SH SOH28 SOIC16 SOIC28

    M40SZ100WMQ6F

    Abstract: No abstract text available
    Text: M40SZ100Y M40SZ100W 5V or 3V NVRAM SUPERVISOR FOR LPSRAM FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 5V OR 3V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN VCC IS OUT-OF-TOLERANCE


    Original     		PDF M40SZ100Y M40SZ100W 16-pin M40SZ100Y: M40SZ100W: 28LEAD 28-LEAD M40SZ100WMQ6F M40SZ100W

    Untitled

    Abstract: No abstract text available
    Text: M40SZ100Y M40SZ100W 5V OR 3V NVRAM SUPERVISOR FOR LPSRAM PRELIMINARY DATA FEATURES SUMMARY • CONVERT LOW POWER SRAMs INTO NVRAMs ■ 5V OR 3V OPERATING VOLTAGE ■ PRECISION POWER MONITORING and POWER SWITCHING CIRCUITRY ■ AUTOMATIC WRITE-PROTECTION WHEN


    Original     		PDF M40SZ100Y M40SZ100W 16-pin M40SZ100Y: M40SZ100W: 28LEAD 28-LEAD

    M40SZ100W

    Abstract: M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28
    Text: M40SZ100Y M40SZ100W 5V or 3V NVRAM supervisor for LPSRAM Features • Convert low power SRAMs into NVRAMs ■ 5V or 3V operating voltage ■ Precision power monitoring and power switching circuitry ■ Automatic write-protection when VCC is out-oftolerance


    Original     		PDF M40SZ100Y M40SZ100W M40SZ100Y: M40SZ100W: 28-lead 28-leand M40SZ100W M40SZ100Y M4ZXX-BR00SH SOH28 SOIC16 SOIC28

    schematic diagram atx Power supply 500w

    Abstract: pioneer PAL 012A 1000w inverter PURE SINE WAVE schematic diagram 600va numeric ups circuit diagrams winbond bios 25064 TLE 9180 infineon smsc MEC 1300 nu TBE schematic diagram inverter 2000w DK55 circuit diagram of luminous 600va UPS
    Text: QUICK INDEX NEW IN THIS ISSUE! Detailed Index - See Pages 3-24 Digital Signal Processors, iCoupler , iMEMS® and iSensor . . . . . 805, 2707, 2768-2769 Connectors, Cable Assemblies, IC Sockets . . . . . . . . . . . 28-568 RF Connectors . . . . . . . . . . . . . . . . . . . . . . Pages 454-455


    Original     		PDF P462-ND P463-ND LNG295LFCP2U LNG395MFTP5U US2011) schematic diagram atx Power supply 500w pioneer PAL 012A 1000w inverter PURE SINE WAVE schematic diagram 600va numeric ups circuit diagrams winbond bios 25064 TLE 9180 infineon smsc MEC 1300 nu TBE schematic diagram inverter 2000w DK55 circuit diagram of luminous 600va UPS

    TSOP32 FOOTPRINT

    Abstract: NVRAM 1KB SOH28 PCB FOOTPRINT M41T81 m48t35 M48T86 M48Z128 M48Z128V M48Z128Y M48Z129V
    Text: Non-Volatile RAMs KEEP TIME, PROTECT DATA NVRAM products offer fast non-volatile memory solutions up to 16 Mbit density using battery backed SRAM, in both surface mount and through-hole packages. Integrated features include battery and crystal, real time clock, watchdog timer, power-on reset, square wave


    Original     		PDF NL-5652 FLNVRAM/1000 TSOP32 FOOTPRINT NVRAM 1KB SOH28 PCB FOOTPRINT M41T81 m48t35 M48T86 M48Z128 M48Z128V M48Z128Y M48Z129V

    W16F

    Abstract: STMicroelectronics SOT23 DATE CODE STM1071 AF SOT23-5 Microprocessor Supervisors NVRAM STM1404 SMT810 STM1001 STM809
    Text: Microprocessor resets and supervisor ICs Selection guide Microprocessor resets and supervisors Microprocessor supervisors with switchover December 2005 STMicroelectronics - December 2005 - Printed in Italy - All rights reserved The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies. All other names are the property of their respective owners.


    Original     		PDF 16ver SGMICROSUPER1105 W16F STMicroelectronics SOT23 DATE CODE STM1071 AF SOT23-5 Microprocessor Supervisors NVRAM STM1404 SMT810 STM1001 STM809

    AN1336

    Abstract: M41ST85Y M48ST59Y
    Text: AN1336 APPLICATION NOTE Power-Fail Comparator for NVRAM Supervisory Devices DEALING WITH UNEXPECTED POWER LOSS Inadvertent or unexpected loss of power can cause a number of system level problems. Memory loss, uncontrolled program status and indeterminate processor state are just a few of the issues which can occur


    Original     		PDF AN1336 AN1336 M41ST85Y M48ST59Y

    STM6823T

    Abstract: AN1957 STM706 STM705 STM706P STM707 STM708 STM813L 440v ac voltage regulator BackUPS control circuitry, switchover, AC voltage
    Text: AN1957 APPLICATION NOTE Microprocessor Supervisor Functions Designers of microprocessor systems have to achieve high reliability, in the face of a large number of threats to stability or even correct functioning such as, voltage drops, glitches, long ramp-up times, programs stuck in endless loops, etc. .


    Original     		PDF AN1957 STM6823T AN1957 STM706 STM705 STM706P STM707 STM708 STM813L 440v ac voltage regulator BackUPS control circuitry, switchover, AC voltage

    Microprocessor Supervisors

    Abstract: WB SOT23-3 STM1061 STWD100 11 SOT23-6 STM11 STM1001 STM1811 STM1812 STM1815
    Text: Microprocessor supervisors and reset ICs Selection guide September 2008 www.st.com/supervisor www.st.com/reset Reset ICs, smart on/off controllers and voltage detectors Smart on/off controllers Single and multiple voltage reset ICs Voltage detectors Monitor voltage


    Original     		PDF STM1001 STM1810 STM1811 STM1812 STM1813 OT23-6, STM1061, STM690A, STM692A, STM703, Microprocessor Supervisors WB SOT23-3 STM1061 STWD100 11 SOT23-6 STM11 STM1001 STM1812 STM1815

    220v AC voltage stabilizer schematic diagram

    Abstract: LG color tv Circuit Diagram tda 9370 1000w inverter PURE SINE WAVE schematic diagram schematic diagram atx Power supply 500w TV SHARP IC TDA 9381 PS circuit diagram wireless spy camera 9744 mini mainboard v1.2 sony 279-87 transistor E 13005-2 superpro lx
    Text: QUICK INDEX NEW IN THIS ISSUE! Detailed Index - See Pages 3-24 AD9272 Analog Front End, iMEMS Accelerometers & Gyroscopes . . . . . . 782, 2583 Connectors, Cable Assemblies, IC Sockets . . . . . . . . . . . 28-528 Acceleration and Pressure Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2585


    Original     		PDF AD9272 P462-ND LNG295LFCP2U P463-ND LNG395MFTP5U 220v AC voltage stabilizer schematic diagram LG color tv Circuit Diagram tda 9370 1000w inverter PURE SINE WAVE schematic diagram schematic diagram atx Power supply 500w TV SHARP IC TDA 9381 PS circuit diagram wireless spy camera 9744 mini mainboard v1.2 sony 279-87 transistor E 13005-2 superpro lx

    K6X8008T2B-UF55

    Abstract: m48t35 HY628100BLLT1-55 BR1632 SRAM 4T cell M48T59 m48z32 MK48T12 AN1012 BR1632 safety
    Text: AN1012 APPLICATION NOTE Predicting the Battery Life and Data Retention Period of NVRAMs and Serial RTCs INTRODUCTION Standard SRAM devices have the advantage, over EEPROM and Flash memory, of high write-speed when used as main memory for a processor or microcontroller. Their disadvantage is that they are volatile,


    Original     		PDF AN1012 K6X8008T2B-UF55 m48t35 HY628100BLLT1-55 BR1632 SRAM 4T cell M48T59 m48z32 MK48T12 AN1012 BR1632 safety

    M4Z32-BROOSH1

    Abstract: M4Z28-BROOSH1 SOH28 m48t35 M4T28-BR12SH1 Zeropower M40SZ100 M40SZ100W M40Z111 M40Z300W
    Text: Non-volatile RAM and RTC Selection guide High density surface mount solutions 32Mb NVRAM LPS LPS LPS LPS 16Mb with parallel RTC RAM RAM LPS RAM T212 RAM RAM LPS RAM 2x 8Mb LPSRAMs M48T212 M40Z300 “Hatless” 4x 8Mb LPSRAMs Mix and match ST SUPERVISORs, LPSRAMs and SNAPHAT tops for a surface mount


    Original     		PDF M48T212 M40Z300 M41ST85 M41ST95 SGNVRAM/0603 M4Z32-BROOSH1 M4Z28-BROOSH1 SOH28 m48t35 M4T28-BR12SH1 Zeropower M40SZ100 M40SZ100W M40Z111 M40Z300W

    SOH28

    Abstract: ic mt 1628 NVRAM STMicroelectronics date CODE so-8 soic date code stmicroelectronics Zeropower ram M48Z m48t35 STMicroelectronics PRODUCT code date m48 M48Z129V M48Z18
    Text: Non-volatile RAMs Selection guide September 2007 www.st.com/nvram ZEROPOWER NVRAMs • ■ Battery backed SRAM 16 Mbit to 16 Kbit Density 16 Mb 2 Mx8 4 Mb (512 Kx8) 1 Mb (128 Kx8) 256 Kb (32 Kx8) 64 Kb (8 Kx8) 16 Kb (2 Kx8) Part number VCC [V] M48Z2M1Y


    Original     		PDF M48Z2M1Y M48Z2M1V M48Z128Y M48Z35 M48Z18 M48Z08 M48Z58 M48Z32V M48Z512AY M48Z129V SOH28 ic mt 1628 NVRAM STMicroelectronics date CODE so-8 soic date code stmicroelectronics Zeropower ram M48Z m48t35 STMicroelectronics PRODUCT code date m48 M48Z129V M48Z18

    QMFZ2,

    Abstract: M41T94W E89556 BR1632A M48T59W M48T37W Rayovac BR1632 M41T11W QMFZ2 plastics
    Text: File E89556 Vol. 1 Sec. 5 and Report Page 1 Issued: Revised: 1994-03-24 2007-04-12 DESCRIPTION PRODUCT COVERED: Component - Integrated Circuits with Lithium Battery Reverse Charging Protection and intended for use with Replaceable Lithium Battery Pack below,


    OCR Scan     		PDF E89556 M48T86W, M48T08W, M48T18W, M48T35W, M48T37W, M48T58W, M48T59W, M48T101W, M48T559W, QMFZ2, M41T94W BR1632A M48T59W M48T37W Rayovac BR1632 M41T11W QMFZ2 plastics

    M41T81SW

    Abstract: i41t56 M40Z312 M41ST87 M41T00W E89556 M40Z111W M40Z300W MK41T56N M40Z31
    Text: File E89556 Vol. 1 Sec. 3 and Report Page 1 Issued: Revised: 1993-07-09 2007-04-12 DESCRIPTION: PRODUCT COVERED; Component - Integrated Circuits with Lithium Battery Reverse Charge Protection, Models MK41T56W, I41T56W, M40C100W, M40Z111W, M40Z300W, M40Z300AW,


    OCR Scan     		PDF E89556 MK41T56W, I41T56W, M40C100W, M40Z111W, M40Z300W, M40Z300AW, M41T56W, M41T56C64W, M41T00W, M41T81SW i41t56 M40Z312 M41ST87 M41T00W M40Z111W M40Z300W MK41T56N M40Z31