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

    NE1617A Search Results

    SF Impression Pixel

    NE1617A Price and Stock

    NXP Semiconductors NE1617ADS,118

    SENSOR DIGITAL -40C-125C 16SSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey NE1617ADS,118 Digi-Reel 1
    • 1 $2.14
    • 10 $2.14
    • 100 $2.14
    • 1000 $2.14
    • 10000 $2.14
    Buy Now
    NE1617ADS,118 Reel
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    NE1617ADS,118 Cut Tape
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now

    NXP Semiconductors NE1617ADS,112

    SENSOR DIGITAL -40C-125C 16SSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey NE1617ADS,112 Tube
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    Bristol Electronics NE1617ADS,112 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Philips Semiconductors NE1617ADS,118

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Bristol Electronics NE1617ADS,118 1,568
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Philips Semiconductors NE1617ADS

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Bristol Electronics NE1617ADS 1,030
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Quest Components NE1617ADS 824
    • 1 $2.6
    • 10 $2.6
    • 100 $2.6
    • 1000 $1.0725
    • 10000 $1.0725
    Buy Now
    NE1617ADS 1,234
    • 1 $3.12
    • 10 $3.12
    • 100 $3.12
    • 1000 $1.17
    • 10000 $1.17
    Buy Now
    NE1617ADS 232
    • 1 $3.12
    • 10 $3.12
    • 100 $1.56
    • 1000 $1.443
    • 10000 $1.443
    Buy Now
    NE1617ADS 216
    • 1 $6.6096
    • 10 $6.6096
    • 100 $4.0759
    • 1000 $4.0759
    • 10000 $4.0759
    Buy Now

    Philips Semiconductors NE1617ADS-T

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Quest Components NE1617ADS-T 1,234
    • 1 $2.8672
    • 10 $2.8672
    • 100 $2.8672
    • 1000 $1.0752
    • 10000 $1.0752
    Buy Now

    NE1617A Datasheets (18)

    Part ECAD Model Manufacturer Description Curated Type PDF
    NE1617A NXP Semiconductors I2C-bus temperature sensors; Small, accurate, low-cost sensors for advanced temperature regulation (Inc. Cross References) Original PDF
    NE1617A Philips Semiconductors Temperature monitor for microprocessor systems Original PDF
    NE1617A Philips Semiconductors Temperature Sensor Original PDF
    NE1617ADS NXP Semiconductors Temperature monitor for microprocessor systems Original PDF
    NE1617ADS Philips Semiconductors Temperature Monitor for Microprocessor Systems Original PDF
    NE1617ADS Philips Semiconductors Temperature monitor for microprocessor systems Original PDF
    NE1617ADS/01,112 NXP Semiconductors NE1617ADS/01 - Temperature monitor for microprocessor systems, SOT519-1 Package, Standard Marking, IC'S Tube - DSC Bulk Pack Original PDF
    NE1617ADS/01,118 NXP Semiconductors NE1617ADS/01 - Temperature monitor for microprocessor systems, SOT519-1 Package, Standard Marking, Reel Pack, SMD, 13" Original PDF
    NE1617ADS,112 NXP Semiconductors Temperature monitor for microprocessor systems - Accuracy on-chip: 1@+60~1002@0~125C; Accuracy remote: 3@+60~1005@0~125C; Assignable addresses: 9 ; Operating temperature: 0~120 Cel; Operating voltage: 3.0~5.5 VDC; Over temperature alert: yes ; Remote temperature monitor: yes ; SMBus clock: 100 kHz; Standby current: 10 uA; Under temperature alert: yes; Package: SOT519-1 (SSOP16); Container: Tube Original PDF
    NE1617ADS,112 NXP Semiconductors NE1617 - IC SPECIALTY ANALOG CIRCUIT, PDSO16, 3.90 MM, 0.635 MM PITCH, PLASTIC, SOT519-1, SSOP-16, Analog IC:Other Original PDF
    NE1617ADS,118 NXP Semiconductors Temperature monitor for microprocessor systems - Accuracy on-chip: 1@+60~1002@0~125C; Accuracy remote: 3@+60~1005@0~125C; Assignable addresses: 9 ; Operating temperature: 0~120 Cel; Operating voltage: 3.0~5.5 VDC; Over temperature alert: yes ; Remote temperature monitor: yes ; SMBus clock: 100 kHz; Standby current: 10 uA; Under temperature alert: yes; Package: SOT519-1 (SSOP16); Container: Reel Pack, SMD, 13" Original PDF
    NE1617ADS,118 NXP Semiconductors NE1617 - IC SPECIALTY ANALOG CIRCUIT, PDSO16, 3.90 MM, 0.635 MM PITCH, PLASTIC, SOT-519-1, SSOP-16, Analog IC:Other Original PDF
    NE1617ADS/CD8458/N NXP Semiconductors NE1617ADS - NE1617ADS - Temperature monitor for microprocessor systems Original PDF
    NE1617ADS/G,112 NXP Semiconductors NE1617ADS/G - Temperature monitor for microprocessor systems, SOT519-1 Package, Standard Marking, IC'S Tube - DSC Bulk Pack Original PDF
    NE1617ADS/G,118 NXP Semiconductors NE1617ADS/G - Temperature monitor for microprocessor systems, SOT519-1 Package, Standard Marking, Reel Pack, SMD, 13" Original PDF
    NE1617ADS-T NXP Semiconductors Temperature monitor for microprocessor systems - Accuracy on-chip: 1@+60~1002@0~125C; Accuracy remote: 3@+60~1005@0~125C; Assignable addresses: 9 ; Operating temperature: 0~120 Cel; Operating voltage: 3.0~5.5 VDC; Over temperature alert: yes ; Remote temperature monitor: yes ; SMBus clock: 100 kHz; Standby current: 10 uA; Under temperature alert: yes Original PDF
    NE1617ADS-T NXP Semiconductors NE1617 - IC SPECIALTY ANALOG CIRCUIT, PDSO16, 3.90 MM, 0.635 MM PITCH, PLASTIC, SOT519-1, SSOP-16, Analog IC:Other Original PDF
    NE1617ADS-T Philips Semiconductors Temperature monitor for microprocessor systems Original PDF

    NE1617A Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    heceta

    Abstract: ADM1021 MAX1617 NE1617A NE1619
    Text: NXP temperature sensors NE1617A & NE1619 Precise thermal monitoring with small, accurate temp sensors These programmable, highly accurate temperature sensors, designed for applications where thermal monitoring of hardware and electrical components is critical, have an operating


    Original
    PDF NE1617A NE1619 16-pin NE1617A MAX1617 ADM1021 NE1619 heceta ADM1021

    ADM1021

    Abstract: MAX1617 NE1617A NE1618 NE1619 SSOP16 heceta
    Text: Philips Semiconductors expands its standard analog portfolio with new temperature sensors in small 16 lead SSOP package Temperature Sensors NE1617A, NE1618, NE1619 These temp sensors operate at a temp range of 0 to +120º C. Key Features • The 1617A is a replacement for the MAX1617 and ADM1021


    Original
    PDF NE1617A, NE1618, NE1619 MAX1617 ADM1021 NE1617A/ NE1618 16-lead ADM1021 NE1617A NE1618 NE1619 SSOP16 heceta

    npn 2n3906

    Abstract: smd transistor marking 11H smd diode marking B3
    Text: NE1617A Temperature monitor for microprocessor systems Rev. 04 — 30 July 2009 Product data sheet 1. General description The NE1617A is an accurate two-channel temperature monitor. It measures the temperature of itself and the temperature of a remote sensor. The remote sensor is a


    Original
    PDF NE1617A NE1617A 2N3904/2N3906, fa7ADS/01 NE1617ADS/G 31-Dec-10 30-Jun-11 NE1617ADS npn 2n3906 smd transistor marking 11H smd diode marking B3

    npn 2n3906

    Abstract: UM10204 2001 2N3904 NXP 2N3904 TRANSISTOR SMD
    Text: NE1617A Temperature monitor for microprocessor systems Rev. 04 — 30 July 2009 Product data sheet 1. General description The NE1617A is an accurate two-channel temperature monitor. It measures the temperature of itself and the temperature of a remote sensor. The remote sensor is a


    Original
    PDF NE1617A NE1617A 2N3904/2N3906, 771-NE1617ADS NE1617ADS npn 2n3906 UM10204 2001 2N3904 NXP 2N3904 TRANSISTOR SMD

    AN10349

    Abstract: philips kt NPN MATCHED PAIRS 2n3904 philips impact Sensor spot temperature sensors temperature sensor LM75A NE1617A NE1618
    Text: AN10349 Digital temperature sensor accuracy explained Rev. 01 — 9 August 2006 Application note Document information Info Content Keywords LM75A, SE95, SA56004X, NE1617A, NE1618, NE1619 Abstract This document explains the various effects on local or remote temperature


    Original
    PDF AN10349 LM75A, SA56004X, NE1617A, NE1618, NE1619 AN10349 philips kt NPN MATCHED PAIRS 2n3904 philips impact Sensor spot temperature sensors temperature sensor LM75A NE1617A NE1618

    npn 2n3906

    Abstract: 2n3904 smd pin configuration 2N3904 TRANSISTOR SMD 2N3904 transistor data sheet free download 2N3906 SMD qsop 16 pcb footprint ADM1021 JESD22-A114 JESD22-A115 JESD78
    Text: NE1617A Temperature monitor for microprocessor systems Rev. 04 — 30 July 2009 Product data sheet 1. General description The NE1617A is an accurate two-channel temperature monitor. It measures the temperature of itself and the temperature of a remote sensor. The remote sensor is a


    Original
    PDF NE1617A NE1617A 2N3904/2N3906, npn 2n3906 2n3904 smd pin configuration 2N3904 TRANSISTOR SMD 2N3904 transistor data sheet free download 2N3906 SMD qsop 16 pcb footprint ADM1021 JESD22-A114 JESD22-A115 JESD78

    npn 2n3906

    Abstract: NE16
    Text: NE1617A Temperature monitor for microprocessor systems Rev. 5 — 20 March 2012 Product data sheet 1. General description The NE1617A is an accurate two-channel temperature monitor. It measures the temperature of itself and the temperature of a remote sensor. The remote sensor is a


    Original
    PDF NE1617A NE1617A 2N3904/2N3906, npn 2n3906 NE16

    Untitled

    Abstract: No abstract text available
    Text: INTEGRATED CIRCUITS NE1617A Temperature monitor for microprocessor systems Product specification Supersedes data of 2000 Jul 13 File under Integrated Circuits, IC11 Handbook Philips Semiconductors 2001 Dec 14 Philips Semiconductors Product data Temperature monitor for microprocessor systems


    Original
    PDF NE1617A MAX1617 ADM1021

    npn 2n3906

    Abstract: 98-8080-575-01 2N3904 transistor data sheet free download data sheet transistor 2n3906 pc controlled robot mini project ADM1021 JESD22-A114 JESD22-A115 JESD78 MAX1617
    Text: INTEGRATED CIRCUITS NE1617A Temperature monitor for microprocessor systems Product data sheet Supersedes data of 2001 Dec 14 Philips Semiconductors 2004 Oct 05 Philips Semiconductors Product data sheet Temperature monitor for microprocessor systems FEATURES


    Original
    PDF NE1617A MAX1617 ADM1021 TEST16 TEST13 npn 2n3906 98-8080-575-01 2N3904 transistor data sheet free download data sheet transistor 2n3906 pc controlled robot mini project ADM1021 JESD22-A114 JESD22-A115 JESD78

    ADM1021

    Abstract: MAX1617 NE1617A NE1617ADS 98-8080-575-01
    Text: INTEGRATED CIRCUITS NE1617A Temperature monitor for microprocessor systems Product specification Philips Semiconductors 2000 Jul 13 Philips Semiconductors Product specification Temperature monitor for microprocessor systems FEATURES NE1617A PIN CONFIGURATION


    Original
    PDF NE1617A MAX1617 ADM1021 ADM1021 NE1617A NE1617ADS 98-8080-575-01

    Blinker

    Abstract: SC16IS752 PCA9624 GTL2003 PWM I2C DIP SC16IS740 SE97 PCA9552 Matrix Graphic LED Drivers 8 12 pcf8562
    Text: Smart, simple solutions for the 10 most common design concerns NXP I2C-bus solutions NXP’s I2C peripherals portfolio is grouped into ten families, one for each of the most common, everyday design concerns. General Purpose Input Output GPIO expanders Add different types


    Original
    PDF PCA9530 OM6290 PCF8576D, PCF2119, PCF8531, PCA9633 Blinker SC16IS752 PCA9624 GTL2003 PWM I2C DIP SC16IS740 SE97 PCA9552 Matrix Graphic LED Drivers 8 12 pcf8562

    LPC2148 i2c

    Abstract: BGB210S lpc2148 interfacing 2.8" TFT LCD DISPLAY BGB210 embedded c code to interface lpc2148 with sensor BGW200 TDA8932T tda8920bj NXP PN531 TDA8947J equivalent
    Text: Building blocks for vibrant media Highlights of the NXP product portfolio Building blocks for vibrant media  At NXP Semiconductors, the new company founded by Philips, we’re driven by a single purpose — to deliver vibrant media technologies that create better sensory experiences.


    Original
    PDF OT363 SC-88) LPC2148 i2c BGB210S lpc2148 interfacing 2.8" TFT LCD DISPLAY BGB210 embedded c code to interface lpc2148 with sensor BGW200 TDA8932T tda8920bj NXP PN531 TDA8947J equivalent

    DTMF DEcoder i2c

    Abstract: lcd tv Philips 32 power supply diagram pcf8814 radio control relays schematic diagram st 9548 eeprom schematic for tv schematic led video colour display lcd tv philips 42 schematic power supply 4 digit non multiplexer lcd diagram LCD led TV circuits
    Text: I2C Device Overview Aug 2002 Agenda • I2C Technology Overview • I2C Product Overview • Typical Applications • Resources Philips I2C products are produced by several business lines including Logic Product Group - Specialty Logic Product Line, Standard Analog and Mobile Display Driver


    Original
    PDF PCA9554/54A/55 PCA9556 PCA9558 PCA9559 PCA9560/61 P82B715 09XXX P82B96 DTMF DEcoder i2c lcd tv Philips 32 power supply diagram pcf8814 radio control relays schematic diagram st 9548 eeprom schematic for tv schematic led video colour display lcd tv philips 42 schematic power supply 4 digit non multiplexer lcd diagram LCD led TV circuits

    89lpc9XX

    Abstract: temperature sensor with 8051 7 segment display how keypad connected to TV REMOTE transmitter sec 8583 rtc ic software program pcf8583 Philips 8583 P87C591 P89LPC932 PCA9564 PCF8584
    Text: Semiconductors I2C Logic Selection Guide 2004 I2C overview Originally, the I2C bus was designed to interact within a small number of devices on a single card, such as to manage the tuning of a car radio or TV. The maximum allowable capacitance was set at 400 pF to allow proper rise and fall times for optimum clock and data signal


    Original
    PDF

    AN10160

    Abstract: philips master replacement guide IC 24c08 dell MTBF 87C51MX semiconductors master replacement guide 8051 using I2C BUS PCA9564 AN10148 pcf 9515 24C08 code example assembly
    Text: Interface Products Business Line Specialty Logic Product Line I2C Logic Family Overview 3Q 2004 Introduction Introduction Semiconductors 2 How the I2C Bus Works The I2C Inter-Integrated Circuit Bus is a two-wire, low to medium speed, communication bus (a path for electronic signals) developed by Philips Semiconductors in the early


    Original
    PDF 1980s. GTL2010PW, P82B96TD, PCA9551D, PCA9545D, PCA9555D, PCA9557D, PCA9515D PCA9501D AN10160 philips master replacement guide IC 24c08 dell MTBF 87C51MX semiconductors master replacement guide 8051 using I2C BUS PCA9564 AN10148 pcf 9515 24C08 code example assembly

    PCA8584

    Abstract: HUB motor 4-1 MULTIPLEXER IC ic software program pcf8583 LVDS I2C EEPROM PCF8562 PCA9552 PCF8591 APPLICATION PCF8591 for RTC P82B96
    Text: I2C Logic Selection Guide Advanced I2C Devices: Innovation in a Mature Technology I2C: Mature Technology for Today’s Complex Systems I2C benefits: • De facto world standard • Fast time-to-market • Proven, robust performance • Very wide range of functions


    Original
    PDF P82B96 RS-422 RS-485 RS-423 RS-232 PCA8584 HUB motor 4-1 MULTIPLEXER IC ic software program pcf8583 LVDS I2C EEPROM PCF8562 PCA9552 PCF8591 APPLICATION PCF8591 for RTC P82B96

    PCF8593* app note

    Abstract: PCF8565 AN10148 8051 microcontroller LED dot matrix 8051 microcontroller LED dot matrix 8*8 PCF8814 P80C552 8*8 led dot MATRIX Driver i2c All nokia mobile ic code image PCA8565
    Text: I2C Overview 2H 2003 Agenda • What is I2C and why would you be interested in using the I2C bus? • What new I2C devices are there and what are the typical applications? • How are we going to help you design-in these devices? Semiconductors 2 Transmission Standards


    Original
    PDF RS-485 RS-423 RS-232 RS-422 P82B96 PCA9555D, PCA9557D, PCA9515D PCA9501D PCF8593* app note PCF8565 AN10148 8051 microcontroller LED dot matrix 8051 microcontroller LED dot matrix 8*8 PCF8814 P80C552 8*8 led dot MATRIX Driver i2c All nokia mobile ic code image PCA8565

    BLF4G08LS-160A

    Abstract: J3A080GA4/T0BG1610 MARKING S08 NXP TJA1050T-CM,11 power+wizard+1.1+fault+codes SCC2691AC1A28 IP5004CX6 TDA8275AHN/C1,557 H3-BGA3XX_11 BZA456A
    Text: NXP Semiconductors Product Discontinuation DN66 June 30, 2010 SEE DN66 NOTICE LETTER FOR APPLICABLE LAST TIME BUY TERMS, CONDITIONS AND CODE DEFINITIONS FOR THESE DISCONTINUED PRODUCTS. FOR ADDED INFORMATION, REFER TO NXP WEB-SITE "http://www.nxp.com/products/eol/"


    Original
    PDF 31-Dec-10 30-Jun-11 UBA2074AT/N1 UBA2074T/N1 UBA2074T/N1 31-Mar-11 UBA2074TS/N1 UBA2074TS/N1 BLF4G08LS-160A J3A080GA4/T0BG1610 MARKING S08 NXP TJA1050T-CM,11 power+wizard+1.1+fault+codes SCC2691AC1A28 IP5004CX6 TDA8275AHN/C1,557 H3-BGA3XX_11 BZA456A

    PCF2129

    Abstract: P82B486 SC18IM700 demo SC16IS750 application Blinker PCF8591 for RTC ADC 12BIT I2C NXP SE97 pcf8562 SC16IS750
    Text: I2C-bus: The serial revolution By replacing complex parallel interfaces with a straightforward yet powerful serial structure, the I2C-bus revolutionized chip-to-chip communications. SDA SCL Invented by NXP Philips more than 20 years ago, the I2C-bus uses a simple two-wire


    Original
    PDF PCF2128 PCA9507 PCA9665 68-byte PCF8584 100-kHz PCA9564 400-kHz PCF2129 P82B486 SC18IM700 demo SC16IS750 application Blinker PCF8591 for RTC ADC 12BIT I2C NXP SE97 pcf8562 SC16IS750

    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

    SC161S752

    Abstract: PCA9518 SC16is7x SC18IM700 demo SC18IM700 LVDS I2C EEPROM SE97 rs232 to I2c SC16IS750 SC16IS750 application
    Text: Advanced I C devices 2 Continuous innovation. Timeless lifespan. I2C: continous innovation I2C benefits } De facto world standard } Fast time-to-market } Proven, robust performance } Very wide range of functions } Easy to design in } Simple to debug } Fast to test and assemble


    Original
    PDF DevelopedbyNXPintheearly1980s SC161S752 PCA9518 SC16is7x SC18IM700 demo SC18IM700 LVDS I2C EEPROM SE97 rs232 to I2c SC16IS750 SC16IS750 application

    Untitled

    Abstract: No abstract text available
    Text: Philips Semiconductors expands its standard analog portfolio with new temperature sensors in small 16 lead SSOP package These temp sensors operate at a temp range of 0 > to +120º C. Key Features • The 1617A is a replacement for the MAX1617 and ADM1021


    Original
    PDF NE1617A, NE1618, NE1619 5K/FP/2pp/1000

    SMD ld50

    Abstract: LD50 VOLTAGE REGULATOR RJ11 socket connector pinout to usb RJ11 4pin ic software program pcf8583 smd diode sk14 LD130 tc-0102 R10k smd LD67
    Text: INTEGRATED CIRCUITS APPLICATION NOTE AN10146-02 I2C 2002-1A EVALUATION BOARD LM75A, PCA9501, PCA9515, PCA9543, PCA9550, PCA9551, PCA9554, PCA9555, PCA9561, PCF8582C-2, P82B96 Abstract – Philips Semiconductors families of I2C devices are detailed in this application note that discusses


    Original
    PDF AN10146-02 002-1A LM75A, PCA9501, PCA9515, PCA9543, PCA9550, PCA9551, PCA9554, PCA9555, SMD ld50 LD50 VOLTAGE REGULATOR RJ11 socket connector pinout to usb RJ11 4pin ic software program pcf8583 smd diode sk14 LD130 tc-0102 R10k smd LD67

    AN10216

    Abstract: hp compaq laptop battery pinouts schematic diagram lcd monitor dell 24C16 serial eeprom interfacing with 8051 an10216-01 i2c TCA280B sony lcd tv SCHEMATIC DIAGRAM free free MAL 24C16 24C16 serial eeprom interfacing with 8051 and lcd LED TV Screen working Theory
    Text: AN10216-01 I2C Manual INTEGRATED CIRCUITS APPLICATION NOTE AN10216-01 I2C MANUAL Abstract – The I2C Manual provides a broad overview of the various serial buses, why the I2C bus should be considered, technical detail of the I2C bus and how it works, previous limitations/solutions, comparison to the SMBus, Intelligent Platform


    Original
    PDF AN10216-01 AN10216-01 AN262 PCA954X AN264 AN444 P82B715 AN460 P82B96 AN469 AN10216 hp compaq laptop battery pinouts schematic diagram lcd monitor dell 24C16 serial eeprom interfacing with 8051 an10216-01 i2c TCA280B sony lcd tv SCHEMATIC DIAGRAM free free MAL 24C16 24C16 serial eeprom interfacing with 8051 and lcd LED TV Screen working Theory