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

    MC74ACT245N Search Results

    SF Impression Pixel

    MC74ACT245N Price and Stock

    onsemi MC74ACT245NG

    IC TXRX NON-INVERT 5.5V 20DIP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74ACT245NG Tube
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    Bristol Electronics MC74ACT245NG 65
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Quest Components MC74ACT245NG 52
    • 1 $1.3
    • 10 $1.04
    • 100 $0.78
    • 1000 $0.78
    • 10000 $0.78
    Buy Now
    Rochester Electronics MC74ACT245NG 5,711 1
    • 1 $0.5633
    • 10 $0.5633
    • 100 $0.5295
    • 1000 $0.4788
    • 10000 $0.4788
    Buy Now

    Rochester Electronics LLC MC74ACT245NG

    IC TXRX NON-INVERT 5.5V 20DIP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74ACT245NG Tube 513
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.59
    • 10000 $0.59
    Buy Now

    Motorola Semiconductor Products MC74ACT245N

    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Bristol Electronics MC74ACT245N 7,773
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Quest Components MC74ACT245N 3,127
    • 1 $0.45
    • 10 $0.45
    • 100 $0.45
    • 1000 $0.1875
    • 10000 $0.1875
    Buy Now
    MC74ACT245N 741
    • 1 $1.75
    • 10 $1.75
    • 100 $0.875
    • 1000 $0.7
    • 10000 $0.7
    Buy Now
    MC74ACT245N 432
    • 1 $0.75
    • 10 $0.75
    • 100 $0.45
    • 1000 $0.375
    • 10000 $0.375
    Buy Now
    MC74ACT245N 280
    • 1 $0.6825
    • 10 $0.6825
    • 100 $0.4095
    • 1000 $0.3413
    • 10000 $0.3413
    Buy Now
    MC74ACT245N 254
    • 1 $0.75
    • 10 $0.75
    • 100 $0.45
    • 1000 $0.375
    • 10000 $0.375
    Buy Now
    MC74ACT245N 128
    • 1 $0.75
    • 10 $0.6
    • 100 $0.45
    • 1000 $0.45
    • 10000 $0.45
    Buy Now
    MC74ACT245N 28
    • 1 $0.8
    • 10 $0.64
    • 100 $0.64
    • 1000 $0.64
    • 10000 $0.64
    Buy Now
    MC74ACT245N 2
    • 1 $1.26
    • 10 $1.26
    • 100 $1.26
    • 1000 $1.26
    • 10000 $1.26
    Buy Now
    ComSIT USA MC74ACT245N 2,946
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Chip 1 Exchange MC74ACT245N 702
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    onsemi MC74ACT245N

    IC,BUS TRANSCEIVER,SINGLE,8-BIT,ACT-CMOS,DIP,20PIN,PLASTIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Quest Components MC74ACT245N 199
    • 1 $0.45
    • 10 $0.45
    • 100 $0.3
    • 1000 $0.3
    • 10000 $0.3
    Buy Now

    MC74ACT245N Datasheets (7)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    MC74ACT245N Motorola OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS Original PDF
    MC74ACT245N On Semiconductor IC BUS XCVR SINGLE 8CH 3-ST 20PDIP RAIL Original PDF
    MC74ACT245N On Semiconductor Octal Bidirectional Transceiver with 3 State Inputs/Outputs; Package: 20 LEAD PDIP; No of Pins: 20; Container: Rail; Qty per Container: 18 Original PDF
    MC74ACT245N Unknown Historical semiconductor price guide (US$ - 1998). From our catalog scanning project. Historical PDF
    MC74ACT245N On Semiconductor Over 600 obsolete distributor catalogs now available on the Datasheet Archive - CMOS Logic, Octal Bidirectional Tnscvr w/3 State Outputs, Pkg Style 20 Lead DIP Scan PDF
    MC74ACT245NG On Semiconductor IC BUS XCVR SINGLE 8CH 3-ST 20PDIP RAIL Original PDF
    MC74ACT245NG On Semiconductor Octal Bidirectional Transceiver with 3 State Inputs/Outputs; Package: 20 LEAD PDIP; No of Pins: 20; Container: Rail; Qty per Container: 18 Original PDF

    MC74ACT245N Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    MC68B21CP

    Abstract: xcm916x1cth16 transistor marking code 12W SOT-23 sg379 MC68B54P XC68HC805P18CDW mc68b50cp MC2830 NE555N CHN NE555N
    Text: SG379/D REV 7 Semiconductor Products Sector NORTH AMERICA SALES AND DISTRIBUTION PRICE LIST THIS BOOK IS IN COMPUTER SORT PRODUCT CLASSIFICATION – Please see General Information Section 1.3 EFFECTIVE DATE: JANUARY 10, 1998 General Information 1 Cross References


    Original
    SG379/D 1N965BRL ZEN15V 1N751AS 1N967BRL ZEN18V 1N751ASRL 1N968BRL ZEN20V MC68B21CP xcm916x1cth16 transistor marking code 12W SOT-23 sg379 MC68B54P XC68HC805P18CDW mc68b50cp MC2830 NE555N CHN NE555N PDF

    5555 FAIRCHILD optocoupler

    Abstract: MC74HC374N 74hc14n equivalent NC7S125M5 14069 HCF4541BEY APPLICATION HCF4013BE 4026 fairchild datasheet 14543 motorola Motorola DM74LS139N
    Text: R E L I A B L E . L O G I C . I N N O V A T I O N . Logic Cross-Reference Logic Cross-Reference 2003 Texas Instruments Printed in the U.S.A. by Texoma Business Forms, Durant, Oklahoma Printed on recycled paper. SCYB017A NEW First Revision Logic Cross-Reference


    Original
    SCYB017A A010203 5555 FAIRCHILD optocoupler MC74HC374N 74hc14n equivalent NC7S125M5 14069 HCF4541BEY APPLICATION HCF4013BE 4026 fairchild datasheet 14543 motorola Motorola DM74LS139N PDF

    MC74AC573DTR2

    Abstract: MC74ACT151D MC74ACT240DW MC74AC273DWR2
    Text: CHAPTER 4 Index http://onsemi.com 295 FACT Device Index Device Number Page Device Number MC74AC00 Page 12 Device Number MC74AC10M 43 MC74AC151DT 80 MC74AC00D 12 MC74AC10N 43 MC74AC151DTR2 80 MC74AC00DR2 12 MC74AC11D 48 MC74AC151M 80 MC74AC00DTR2 12 MC74AC11DR2


    Original
    MC74AC00 MC74AC00D MC74AC00DR2 MC74AC00DTR2 MC74AC00MEL MC74AC00N MC74AC00NG MC74AC02D MC74AC02DR2 MC74AC02DT MC74AC573DTR2 MC74ACT151D MC74ACT240DW MC74AC273DWR2 PDF

    ACT245

    Abstract: MC74AC245 MC74AC245DW MC74AC245DWR2 MC74AC245N MC74ACT245 MC74ACT245DW MC74ACT245DWR2 MC74ACT245N
    Text: MC74AC245, MC74ACT245 Octal Bidirectional Transceiver with 3−State Inputs/Outputs The MC74AC245/74ACT245 contains eight non−inverting bidirectional buffers with 3−state outputs and is intended for bus−oriented applications. Current sinking capability is 24 mA at both


    Original
    MC74AC245, MC74ACT245 MC74AC245/74ACT245 PDIP-20 SO-20 MC74AC245/D ACT245 MC74AC245 MC74AC245DW MC74AC245DWR2 MC74AC245N MC74ACT245 MC74ACT245DW MC74ACT245DWR2 MC74ACT245N PDF

    CS5170

    Abstract: mps2112 MPS2112ZL1 100A 300V IGBT MC3346P CS4124YDW16 ON Semiconductor PRICE BOOK 12V to 220V smps inverter bd234 igbt ac motor speed control
    Text: SGD501/D REV 8, January 5, 2002 NORTH AMERICA SALES AND DISTRIBUTION ON Semiconductor PRICE BOOK THIS BOOK IS IN COMPUTER SORT PRODUCT CLASSIFICATION – Please see General Information Section EFFECTIVE DATE: JANUARY 5, 2002 General Information Elimination Of Ozone Depleting Chemicals . . . .


    Original
    SGD501/D Janua667 CS5170 mps2112 MPS2112ZL1 100A 300V IGBT MC3346P CS4124YDW16 ON Semiconductor PRICE BOOK 12V to 220V smps inverter bd234 igbt ac motor speed control PDF

    Arduino Mega2560

    Abstract: 13001 S 6D TRANSISTOR arduino uno rev 3 agilent optical encoder 9988 MZ 13001 TRANSISTOR arduino mega 2650 skiip 613 gb 123 ct arduino sound sensor module pic arduino nano mc34063l
    Text: ND3% BASE1 XXXX2108-0010-1-P 10 TSQ: 3001 CMS: CMS-USM TS host OP: NN COMP: 15-07-11 Hour: 13:07 TS:TS date TS time MCUS, MPUS, DSPS & DEVELOPMENT TOOLS Find Datasheets Online 8-BIT MCUS & DEVELOPMENT TOOLS 1 PSoC 3 DEVELOPMENT KITS ARDUINO MCU DEVLOPMENT PLATFORM


    Original
    CY8C38 CY8C29 incl795 12T9797 12T9804 12T9803 12T9800 12T9802 12T9801 12T9805 Arduino Mega2560 13001 S 6D TRANSISTOR arduino uno rev 3 agilent optical encoder 9988 MZ 13001 TRANSISTOR arduino mega 2650 skiip 613 gb 123 ct arduino sound sensor module pic arduino nano mc34063l PDF

    RES-6.5-FG4

    Abstract: LD128 LQ104V1DG11 60 pin LCD connector to vga 15 pin conversion R410-412 4-Pin HIROSE LQ104V1DG51 sharp lcd service manual K1958 touch screen 3M
    Text: Freescale Semiconductor, Inc. Application Note AN2309/D Rev. 0, 07/2002 Freescale Semiconductor, Inc. MC9328MX1 Reference Design for High Resolution Software Development By Adrián Pineda Dávila Contents Introduction. . . . . . . . . . . . . 1 Hardware . . . . . . . . . . . . . . 1


    Original
    AN2309/D MC9328MX1 RES-6.5-FG4 LD128 LQ104V1DG11 60 pin LCD connector to vga 15 pin conversion R410-412 4-Pin HIROSE LQ104V1DG51 sharp lcd service manual K1958 touch screen 3M PDF

    SOEIAJ-20

    Abstract: 74AC ACT245 MC74AC245 MC74ACT245 MC74AC245N MC74ACT245DTG
    Text: MC74AC245, MC74ACT245 Octal Bidirectional Transceiver with 3−State Inputs/Outputs The MC74AC245/74ACT245 contains eight non−inverting bidirectional buffers with 3−state outputs and is intended for bus−oriented applications. Current sinking capability is 24 mA at both


    Original
    MC74AC245, MC74ACT245 MC74AC245/74ACT245 PDIP-20 MC74AC245/D SOEIAJ-20 74AC ACT245 MC74AC245 MC74ACT245 MC74AC245N MC74ACT245DTG PDF

    ld117

    Abstract: res-10.4 pl4 LQ64D343 sharp 21 lcd service manual touch screen controller dynapro resistive touch screen sharp freescale BERG 65801-004 LQ104V1DG11 RES-6.5-FG4 LCD 320x480
    Text: Freescale Semiconductor Application Note Reference Design for High Resolution LCD Software Development MC9328MX1 This document describes a reference design for developing high resolution software using the MC9328MX1 Application Development System ADS . The scope of this text involves the hardware required to


    Original
    MC9328MX1 MC9328MX1 ld117 res-10.4 pl4 LQ64D343 sharp 21 lcd service manual touch screen controller dynapro resistive touch screen sharp freescale BERG 65801-004 LQ104V1DG11 RES-6.5-FG4 LCD 320x480 PDF

    1500w audio amplifier circuit

    Abstract: Schottky Diode 80V 6A 1500w PWM 220v C106MG marking code SS SOT23 tl494cn inverter datasheet smps 1500W MMSZ5231BT1G dc 220v motor speed control circuit with scr NCP1200P60G
    Text: SGD501/D REV 19, October 9, 2004 NORTH AMERICA SALES AND DISTRIBUTION ON Semiconductor PRICE BOOK THIS BOOK IS IN COMPUTER SORT PRODUCT CLASSIFICATION − Please see General Information Section EFFECTIVE DATE: OCTOBER 9, 2004  General Information ON Semiconductor Standard Policies


    Original
    SGD501/D 74VCX16373DT 74VCX16373DTR 74VCX16374DT 16BIT 74VCX16374DTR 80SQ045N 80SQ045NRL 1500w audio amplifier circuit Schottky Diode 80V 6A 1500w PWM 220v C106MG marking code SS SOT23 tl494cn inverter datasheet smps 1500W MMSZ5231BT1G dc 220v motor speed control circuit with scr NCP1200P60G PDF

    MC68SEC811E2FN

    Abstract: MC145152P2 MC68HC705P6ACP MC74HC14AD MC68HC811E2CFN2 MC74HC4538 MC14585BCP MC74HC74AD MC145151P2 MC68HC711D3CFN2
    Text: Semiconductor Directory Mfr.Õs Type 13 Price Mfr.Õs Code Page Mfr.Õs Type Price Mfr.Õs Code Page Mfr.Õs Type Price Mfr.Õs Code Page Mfr.Õs Type Price Mfr.Õs Code Page MC14029BCP MC1403D MC14040BCP MC14042BCP MC14043BCP 0.35 1.12 0.44 0.44 0.35 ONS


    Original
    MC14029BCP MC1458D MC68HC705J1ACP MC74HC245AN MC1403D MC1458P MC68HC705P6ACP MC74HC273ADW MC14040BCP MC1488D MC68SEC811E2FN MC145152P2 MC74HC14AD MC68HC811E2CFN2 MC74HC4538 MC14585BCP MC74HC74AD MC145151P2 MC68HC711D3CFN2 PDF

    CD4558

    Abstract: NC7S125 MC74F138N HCF4541 Motorola MC74HC251N 74ACT161 DHVQFN-20 74V1G08 SOT323/5 HCF4017 SN74ACT14DR
    Text: Logic Cross-Reference Introduction This Logic Cross-Reference for Buyers, Distribution Specialists and others with an interest in Logic will assist in finding a device made by Texas Instruments that is identical or similar to many of our competitors’ Logic products.


    Original
    74ABT16244 A010203 53001cov SCYB017 CD4558 NC7S125 MC74F138N HCF4541 Motorola MC74HC251N 74ACT161 DHVQFN-20 74V1G08 SOT323/5 HCF4017 SN74ACT14DR PDF

    74AC

    Abstract: ACT245 MC74AC245 MC74AC245N MC74ACT245 MC74AC245DW MC74ACT245DTG
    Text: MC74AC245, MC74ACT245 Octal Bidirectional Transceiver with 3−State Inputs/Outputs The MC74AC245/74ACT245 contains eight non−inverting bidirectional buffers with 3−state outputs and is intended for bus−oriented applications. Current sinking capability is 24 mA at both


    Original
    MC74AC245, MC74ACT245 MC74AC245/74ACT245 PDIP-20 and11 74AC ACT245 MC74AC245 MC74AC245N MC74ACT245 MC74AC245DW MC74ACT245DTG PDF

    24 v 55

    Abstract: MC74AC245DW MC74AC245DWR2 MC74AC245N MC74ACT245 MC74ACT245DW MC74ACT245DWR2 MC74ACT245N ACT245 MC74AC245
    Text: MC74AC245, MC74ACT245 Octal Bidirectional Transceiver with 3-State Inputs/Outputs The MC74AC245/74ACT245 contains eight non–inverting bidirectional buffers with 3–state outputs and is intended for bus–oriented applications. Current sinking capability is 24 mA at both


    Original
    MC74AC245, MC74ACT245 MC74AC245/74ACT245 r14525 MC74AC245/D 24 v 55 MC74AC245DW MC74AC245DWR2 MC74AC245N MC74ACT245 MC74ACT245DW MC74ACT245DWR2 MC74ACT245N ACT245 MC74AC245 PDF

    MC74ACT245DTG

    Abstract: No abstract text available
    Text: MC74AC245, MC74ACT245 Octal Bidirectional Transceiver with 3−State Inputs/Outputs The MC74AC245/74ACT245 contains eight non−inverting bidirectional buffers with 3−state outputs and is intended for bus−oriented applications. Current sinking capability is 24 mA at both


    Original
    MC74AC245, MC74ACT245 MC74AC245/74ACT245 MC74AC245/D MC74ACT245DTG PDF

    sharp lcd service manual

    Abstract: philmore 212 LQ64D343 ld117 r410.412 dynapro touch LD128 touch screen controller dynapro R410-412 K1958
    Text: Application Note AN2309/D Rev. 0, 07/2002 MC9328MX1 Reference Design for High Resolution Software Development By Adrián Pineda Dávila Contents Introduction. . . . . . . . . . . . . 1 Hardware . . . . . . . . . . . . . . 1 Software . . . . . . . . . . . . . . 10


    Original
    AN2309/D MC9328MX1 sharp lcd service manual philmore 212 LQ64D343 ld117 r410.412 dynapro touch LD128 touch screen controller dynapro R410-412 K1958 PDF

    74ls74apc

    Abstract: HD74ls04p 74LVC1G04ady8 semiconductor AZ431BZ-AE1 HCF4060BE HEF4093BP datasheet free download ne5334 hd74hc132p dm74ls47n
    Text: Standard Linear and Logic Products Cross-Reference Introduction Notice This Standard Linear and Logic Products CrossReference will assist in finding a device made by Texas Instruments that is a drop-in or similar replacement to many of our competitors’ standard linear and logic products.


    Original
    PDF

    ANA 618

    Abstract: voltage regulator ana 618 NZSMB15CAT3 GP 809 DIODE 1500w audio amplifier circuit SPEED CONTROL of DC MOTOR tda1085c CS5170 ANA 618* voltage regulator 12 VOLT 2 AMP smps diode 1n4007 MIC MAKE
    Text: SGD501/D REV 13, April 12, 2003 NORTH AMERICA SALES AND DISTRIBUTION ON Semiconductor PRICE BOOK THIS BOOK IS IN COMPUTER SORT PRODUCT CLASSIFICATION - Please see General Information Section EFFECTIVE DATE: APRIL 12, 2003  General Information Elimination Of Ozone Depleting Chemicals . . . .


    Original
    SGD501/D ANA 618 voltage regulator ana 618 NZSMB15CAT3 GP 809 DIODE 1500w audio amplifier circuit SPEED CONTROL of DC MOTOR tda1085c CS5170 ANA 618* voltage regulator 12 VOLT 2 AMP smps diode 1n4007 MIC MAKE PDF

    MC0628R

    Abstract: 40373 74hc14n equivalent 4046 application note philips HCF4060BE HCF4017BE SN74121 application note MC74HC373DW mc0628 HCF4053BE
    Text: R E L I A B L E . L O G I C . I N N O V A T I O N . Logic Cross-Reference Logic Cross-Reference 2003 Texas Instruments Printed in the U.S.A. by Texoma Business Forms, Durant, Oklahoma Printed on recycled paper. SCYB017A NEW First Revision Logic Cross-Reference


    Original
    SCYB017A T74ALVC32374 74CBTLV16211 SN74CBTD16211 SN74SSTV16859 SN74CBTLV16211GRDR SN74ALVC16245AGRDR -SN74SSTV16859GKER MC0628R 40373 74hc14n equivalent 4046 application note philips HCF4060BE HCF4017BE SN74121 application note MC74HC373DW mc0628 HCF4053BE PDF

    sharp lcd service manual

    Abstract: LD128 touch screen controller dynapro R410-412 ld117 LQ104V1DG51 40 pin tft connector philmore TOUCH SCREEN MCU LD11
    Text: Freescale Semiconductor Application Note AN2309/D Rev. 1, 11/2004 Reference Design for High Resolution LCD Software Development MC9328MX1 This document describes a reference design for developing high resolution software using the MC9328MX1 Application Development System ADS .


    Original
    AN2309/D MC9328MX1 MC9328MX1 sharp lcd service manual LD128 touch screen controller dynapro R410-412 ld117 LQ104V1DG51 40 pin tft connector philmore TOUCH SCREEN MCU LD11 PDF

    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
    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 PDF

    IL311ANM

    Abstract: tda8362b ILa1519B1Q iff4n60 IN1307N tda8890 IL311AN IL91214AN MC74HC123AN IL258D
    Text: SEMICONDUCTOR PRODUCTS SHORT FORM CATALOG INTEGRAL 2010-2011 INTEGRAL JSC reserves the right to make changes in device design, specifications and other information identified in this publication without notice and assumes no responsibility for the use of any device described herein.


    Original
    PDF

    74xx163

    Abstract: TRANSISTOR AC125 74xx138 yb4 bridge diode 74ACT161 ac373 motorola 74ACT640 ACT163 10125 ecl to ttl 74ACT244
    Text: DL138/D Rev. 4, May-2001 FACT Device Data FACT Device Data 05/01 DL138 REV 4 FACT Device Data DL138/D Rev. 4, Jun–2001  SCILLC, 2001 Previous Edition  1993 “All Rights Reserved” FACT is a trademark of National Semiconductor Corporation. MOSAIC is a trademark of Motorola, Inc.


    Original
    DL138/D May-2001 DL138 r14525 74xx163 TRANSISTOR AC125 74xx138 yb4 bridge diode 74ACT161 ac373 motorola 74ACT640 ACT163 10125 ecl to ttl 74ACT244 PDF

    CD4049BE

    Abstract: MC74HC374N mc74hct244n lcx 574 MC74HCT245N MC74HCT245DW MC74HC373DW CD4049B Texas Instruments On semiconductor LCX 574 MC74HCT373N
    Text: ON Semiconductor - Texas Instruments Logic Cross-Reference Root 2 2 ON Generic MC74AC00 MC74AC00 MC74AC00 MC74AC00 MC74AC00 MC74AC00 MC74AC00 MC74ACT00 MC74ACT00 MC74ACT00 MC74ACT00 MC74ACT00 MC74ACT00 MC74ACT00 MC74HC00A MC74HC00A MC74HC00A MC74HC00A MC74HC00A


    Original
    MC74AC00 MC74ACT00 CD4049BE MC74HC374N mc74hct244n lcx 574 MC74HCT245N MC74HCT245DW MC74HC373DW CD4049B Texas Instruments On semiconductor LCX 574 MC74HCT373N PDF