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

    Q525 Search Results

    SF Impression Pixel

    Q525 Price and Stock

    ams OSRAM Group LV-CRBP.01-KXLY-AD-Q525-350-R18

    67000
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey LV-CRBP.01-KXLY-AD-Q525-350-R18 Cut Tape 1,789 1
    • 1 $2.14
    • 10 $1.387
    • 100 $2.14
    • 1000 $2.14
    • 10000 $2.14
    Buy Now
    LV-CRBP.01-KXLY-AD-Q525-350-R18 Digi-Reel 1,789 1
    • 1 $2.14
    • 10 $1.387
    • 100 $2.14
    • 1000 $2.14
    • 10000 $2.14
    Buy Now
    LV-CRBP.01-KXLY-AD-Q525-350-R18 Reel 1,200 600
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.83465
    • 10000 $0.7155
    Buy Now

    TE Connectivity W67-X2Q52-5

    CIR BRKR MAG-HYDR 5A 65VDC LEVER
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey W67-X2Q52-5 Tray 77 1
    • 1 $92.5
    • 10 $77.006
    • 100 $54.7199
    • 1000 $54.7199
    • 10000 $54.7199
    Buy Now
    Mouser Electronics W67-X2Q52-5 110
    • 1 $76.8
    • 10 $62.78
    • 100 $54.6
    • 1000 $54.41
    • 10000 $54.41
    Buy Now
    Newark W67-X2Q52-5 Bulk 144
    • 1 -
    • 10 -
    • 100 $52.79
    • 1000 $52.79
    • 10000 $52.79
    Buy Now
    Master Electronics W67-X2Q52-5 114
    • 1 $152.98
    • 10 $150.68
    • 100 $77.16
    • 1000 $52
    • 10000 $52
    Buy Now
    Sager W67-X2Q52-5 24
    • 1 -
    • 10 -
    • 100 $67.68
    • 1000 $67.68
    • 10000 $67.68
    Buy Now

    Vishay Semiconductors TZQ5256B-GS08

    DIODE ZENER 30V 500MW SOD80
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey TZQ5256B-GS08 Reel 12,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now

    Samtec Inc DW-10-10-F-Q-525

    FLEXIBLE BOARD STACKING HEADER W
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey DW-10-10-F-Q-525 Bulk 1
    • 1 $9.09
    • 10 $9.09
    • 100 $9.09
    • 1000 $9.09
    • 10000 $9.09
    Buy Now

    Samtec Inc DW-36-10-F-Q-525

    FLEXIBLE BOARD STACKING HEADER W
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey DW-36-10-F-Q-525 Bulk 1
    • 1 $21.61
    • 10 $21.61
    • 100 $21.61
    • 1000 $21.61
    • 10000 $21.61
    Buy Now

    Q525 Datasheets (1)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    Q5-250 Unknown Shortform Semicon, Diode, and SCR Datasheets Short Form PDF

    Q525 Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    MSM66Q573

    Abstract: 0000H-FFFFH MSM66Q577 577C C573C
    Text: お客様各位 資料中の「沖電気」「OKI」等名称の OKI セミコンダクタ株式会社への変更について 2008 年 10 月 1 日を以って沖電気工業株式会社の半導体事業は OKI セミコン ダクタ株式会社に承継されました。 従いまして、本資料中には「沖電気工業株


    Original
    FJBLMTOADAPTER-02 Copyright2001OKIELECTRICINDUSTRYCO. MSM66Q573/Q577/Q517/Q525 MTP66573TF-100 1MTP66573TF-100 MSM66Q573/Q577 MSM66Q573MSM66Q577" MSM66Q573 0000H-FFFFH MSM66Q577 577C C573C PDF

    ICS9LP306

    Abstract: Inventec SC7652 KBC1021 Inventec VAIL 2.0 kahuna rqa130n03 1981HD 51117 TP772
    Text: GALLO 1.0 PV BUILD 2006.02.08 EE DATE POWER DATE DRAWER DESIGN CHECK RESPONSIBLE DATE CHANGE NO. REV 3 SIZE = FILE NAME : XXXX-XXXXXX-XX XXXXXXXXXXXX P/N INVENTEC TITLE VER : GALLO 1.0 SIZE CODE A3 CS SHEET REV DOC. NUMBER Model_No 1 OF A01 58 TABLE OF CONTENTS


    Original
    R5000 D5000 R5004 SW5004 21SUYC S5005 S5004 S5001 C5002 1000PF ICS9LP306 Inventec SC7652 KBC1021 Inventec VAIL 2.0 kahuna rqa130n03 1981HD 51117 TP772 PDF

    BA41-00727A

    Abstract: LE88CLGM 82801 hbm IDTCV179 20D2G q231 samsung lcd tv power supply schematic NH82801HEM NB8M-SE RB1 Wlan Cardbus
    Text: 4 3 1 2 SAMSUNG PROPRIETARY THIS DOCUMENT CONTAINS CONFIDENTIAL PROPRIETARY INFORMATION THAT IS SAMSUNG ELECTRONICS CO’S PROPERTY. DO NOT DISCLOSE TO OR DUPLICATE FOR OTHERS EXCEPT AS AUTHORIZED BY SAMSUNG. Table of Contents D TORINO 2 g n l u a s i t m


    Original
    965GM BA41-00727A TP17351 7SZ08 TP16469 TP16470 LTST-C193TBKT-AC A3212ELH/HED55XXU12 MT539 TP16471 LE88CLGM 82801 hbm IDTCV179 20D2G q231 samsung lcd tv power supply schematic NH82801HEM NB8M-SE RB1 Wlan Cardbus PDF

    Inventec VAIL 2.0

    Abstract: PC9603 Inventec INVENTEC davos INVENTEC DAVOS 3.0 GST5009 C5761 Compaq P58 VSS28 CN5-001
    Text: DAVOS-DF PV-1-BUILD 2004.11.04 EE DATE DATE POWER DRAWER DESIGN CHECK RESPONSIBLE DATE CHANGE NO. REV 3 SIZE = FILE NAME : XXXX-XXXXXX-XX P/N XXXXXXXXXXXX INVENTEC TITLE VER : DAVOS-DF SIZE CODE A3 CS SHEET DOC. NUMBER REV PC9603 1 A01 OF 65 TABLE OF CONTENTS


    Original
    PC9603 OTS144058 10/27---update Inventec VAIL 2.0 PC9603 Inventec INVENTEC davos INVENTEC DAVOS 3.0 GST5009 C5761 Compaq P58 VSS28 CN5-001 PDF

    samsung 822

    Abstract: 37 TV samsung lcd Schematic circuit diagram samsung lcd tv power supply schematic schematic diagram crt tv samsung BD40 SAMSUNG TV 40 LCD SAMSUNG ELECTRONICS BA44 schematic atx 2.03 P4 37 TV samsung lcd Schematic g1003 lyon samsung
    Text: -이 기술 자산으로 승인자만이 사용할사용할 수 있습니다 이 문서는 문서는삼성전자의 삼성전자의 기술 자산으로 승인자만이 수 있습니다 - This can notnot be be used without Samsung's authorization ThisDocument


    Original
    CK-505 EMC2102 478pin samsung 822 37 TV samsung lcd Schematic circuit diagram samsung lcd tv power supply schematic schematic diagram crt tv samsung BD40 SAMSUNG TV 40 LCD SAMSUNG ELECTRONICS BA44 schematic atx 2.03 P4 37 TV samsung lcd Schematic g1003 lyon samsung PDF

    SLB9635TT12

    Abstract: SLB9635TT1.2 32 inch TV samsung lcd Schematic fairchild diode smd code aa35 SC454 slb9635 BA41-00905A 20B3 diode BA09-00009A B503 F
    Text: SENS X360 A B C D 4 SAMSUNG PROPRIETARY 3 4 HJ KIM Jun PARK T.R. Date 3 JS EUH APPROVAL : Dev. Step Revision CHECK BA41-00906A GCE : PR/MP : 1.1 DRAW Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page. Page.


    Original
    BA41-00905A 220nF 12MHZ BAV99LT1 100nF MX25L4005AM2C-12G 15-A4 14-C2 14-C2 SLB9635TT12 SLB9635TT1.2 32 inch TV samsung lcd Schematic fairchild diode smd code aa35 SC454 slb9635 20B3 diode BA09-00009A B503 F PDF

    DIODE 22B4

    Abstract: BA4602 ba41-00316a AR5212 MAP17-232 Q506 nvidia 7100 AR5211 27b1 diode geforce4
    Text: X10 DRAW Model Name PBA Name PCB Code Dev. Step Revision APPROVAL AQUILA MAIN BA92-01774A BA41-#####A SR 1.0 CHECK : : : : : CPU :P4-BANIAS Chip Set :MCH-M ODEM Remarks :TEMP AQUILA 7 Schematic Diagrams and PCB Silkscreen 7-1 MAIN BOARD 7-1-1 Schematic Diagrams


    Original
    BA92-01774A BA41-# 400MHZ 512MBYTE 66MHZ MAP31 68ohm 3000mA 012ohm DIODE 22B4 BA4602 ba41-00316a AR5212 MAP17-232 Q506 nvidia 7100 AR5211 27b1 diode geforce4 PDF

    Prestigio nobile 150

    Abstract: diagram HANNSTAR j mv 4 Prestigio lad1 12vdc msi MOTHERBOARD SERVICE MANUAL LYNX SM 30 diagram HANNSTAR k mv diagram HANNSTAR k mv 4 IC25N040ATMR Insyde bios manual
    Text: PRESTIGIO NOBILE 150 TECHNICAL SERVICE MANUAL Contents 1. Hardware Engineering Specification ………………………………………………………………………. 4 1.1 Introduction ………………………………………………………………………………………………………………… 4


    Original
    PC536 MAXIM1907) 82801DBM W83L950D PLL207-151 VT6105LOM 8089P Prestigio nobile 150 diagram HANNSTAR j mv 4 Prestigio lad1 12vdc msi MOTHERBOARD SERVICE MANUAL LYNX SM 30 diagram HANNSTAR k mv diagram HANNSTAR k mv 4 IC25N040ATMR Insyde bios manual PDF

    VT8372

    Abstract: schematic diagram lcd monitor chimei AMD AM2 motherboard schematic diagram intel g31 motherboard repair gigabyte g31 MOTHERBOARD SERVICE MANUAL ck 66 ul94v-0 lcd MHT2040T kingmax micro SD Card Mitsumi D353FUE g31 motherboard repair
    Text: SERVICE MANUAL FOR 8381 BY: Valley.Hu Repair Technology Research Department /EDVD Jul.2003 8381 N/B Maintenance Contents 1. Hardware Engineering Specification - 3 1.1 Introduction - 3


    Original
    VT8372 VT8235 H8S/2149 N/B8381 schematic diagram lcd monitor chimei AMD AM2 motherboard schematic diagram intel g31 motherboard repair gigabyte g31 MOTHERBOARD SERVICE MANUAL ck 66 ul94v-0 lcd MHT2040T kingmax micro SD Card Mitsumi D353FUE g31 motherboard repair PDF

    c5586

    Abstract: c5679 C5694 c5487 47N253 c5664 c5598 c5717 C5488 ez 4r 823
    Text: Approvals Revisions REV ECN NO. Description Of Change DATE DFTG. ENGR. REL. TABLE OF CONTENTS PAGE 4 - CLOCK GENERATOR 5-7 - BANIAS PROCESSOR 8-10 - ODEM 11-14 - DDR 15-18 - ATI_M10_P 19-20 - VGA DDR 21 -LCD&TV CONNECTOR INTERFACE 22- CRT INTERFACE 23-25- ICH4-M


    Original
    16-Jun-2004 QC5420 R1388 C5704 LP2996MRX 6-May-2004 c5586 c5679 C5694 c5487 47N253 c5664 c5598 c5717 C5488 ez 4r 823 PDF

    AR5212

    Abstract: ar5312 diode 39b2 AR5112 AR5213 AR5211 st c739 FD507 U508-3 AR533 Ct516
    Text: 7 Schematic Diagrams and PCB Silkscreen 7-1 MAIN BOARD 7-1-1 Schematic Diagrams X05 7-1 This Document can not be used without Samsung’s authorization. 7 Schematic Diagrams and PCB Silkscreen 7-1-1 a Main Board Schematic Sheet 2 of 40(Operation Block Diagram)


    Original
    ISL6225VCC AR5212 ar5312 diode 39b2 AR5112 AR5213 AR5211 st c739 FD507 U508-3 AR533 Ct516 PDF

    diagram HANNSTAR k mv

    Abstract: 8089P diagram HANNSTAR j mv 4 diagram HANNSTAR k mv 4 LF-H41S ALC101 diagram motherboard hannStar K MV USBHUB W83L950 hannstar j mv 1
    Text: SERVICE MANUAL FOR 8089P BY: Ally.Yuan Repair Technology Research Department /EDVD Mar.2004 8089P N/B Maintenance Contents 1. Hardware Engineering Specification ………………………………………………………………………. 4 1.1 Introduction ………………………………………………………………………………………………………………… 4


    Original
    8089P 8089P 82801DBM W83L950D PLL207-151 VT6105LOM diagram HANNSTAR k mv diagram HANNSTAR j mv 4 diagram HANNSTAR k mv 4 LF-H41S ALC101 diagram motherboard hannStar K MV USBHUB W83L950 hannstar j mv 1 PDF

    samsung r580

    Abstract: BA41-01174A marvell 88E8059 88E8059 SMSC mec1308 TPS51125 mec1308 tps51125 SCHEMATIC smd diode code MK a8 c917
    Text: - 이 문서는 삼성전자의 기술 자산으로 승인자만이 사용할 수 있습니다 - This Document can not be used without Samsung's authorization - 8. Block Diagram and Schematic D C B A 4 SAMSUNG PROPRIETARY THIS DOCUMENT CONTAINS CONFIDENTIAL


    Original
    BA41-01174A 100nF MIC502 B4013AM423-32 MIC500 SOM4013SL-G443-C1033 samsung r580 marvell 88E8059 88E8059 SMSC mec1308 TPS51125 mec1308 tps51125 SCHEMATIC smd diode code MK a8 c917 PDF

    ASM1442

    Abstract: bd82hm55 SMSC mec1308 mec1308 Intel hm55 JLCD500 HM55 CRB smsc mec1308-nu LTST-C193TBKT-AC N11X-GE1
    Text: - 이 문서는 삼성전자의 기술 자산으로 승인자만이 사용할 수 있습니다 - This Document can not be used without Samsung's authorization - 8. Block Diagram and Schematic D C B A 4 SAMSUNG PROPRIETARY THIS DOCUMENT CONTAINS CONFIDENTIAL


    Original
    BREMEN-15C/17C BREMEN-15C/17C BA41-xxxxxA 100nF C1114 ASM1442 bd82hm55 SMSC mec1308 mec1308 Intel hm55 JLCD500 HM55 CRB smsc mec1308-nu LTST-C193TBKT-AC N11X-GE1 PDF

    H8S-2110B

    Abstract: HDR-40P-2R-SMD samsung u544 AMD 218S6ECLA21FG SB600 BGA IC monacor sp 202 SI2315BDS-T1 BD2430 RS600ME 36B2 U544-5
    Text: 4 3 2 1 SAMSUNG PROPRIETARY THIS DOCUMENT CONTAINS CONFIDENTIAL PROPRIETARY INFORMATION THAT IS SAMSUNG ELECTRONICS CO’S PROPERTY. DO NOT DISCLOSE TO OR DUPLICATE FOR OTHERS EXCEPT AS AUTHORIZED BY SAMSUNG. TABLE OF CONTENTS D MONACO-R C B g n l u a s i


    Original
    P16806 TP16807 TP16808 TP16809 TP16810 TP16811 TP16812 TP16813 TP16814 TP16815 H8S-2110B HDR-40P-2R-SMD samsung u544 AMD 218S6ECLA21FG SB600 BGA IC monacor sp 202 SI2315BDS-T1 BD2430 RS600ME 36B2 U544-5 PDF

    RAS 0510 SUN HOLD

    Abstract: sun hold RAS 0510 SUN HOLD, RAS 0510 NH82801HBM bd3 c531 diode schematic diagram hdmi to rca le88clpm U519-1 20B3 diode schematic diagram crt tv samsung
    Text: 4 3 2 1 SAMSUNG PROPRIETARY THIS DOCUMENT CONTAINS CONFIDENTIAL PROPRIETARY INFORMATION THAT IS SAMSUNG ELECTRONICS CO’S PROPERTY. DO NOT DISCLOSE TO OR DUPLICATE FOR OTHERS EXCEPT AS AUTHORIZED BY SAMSUNG. Table of Contents D GENEVA CPU : Chip Set : Remarks :


    Original
    BA41-XXXXX SheP18050 TP18051 TP18052 TP18164 TP18170 TP18172 TP18178 TP18183 TP18187 RAS 0510 SUN HOLD sun hold RAS 0510 SUN HOLD, RAS 0510 NH82801HBM bd3 c531 diode schematic diagram hdmi to rca le88clpm U519-1 20B3 diode schematic diagram crt tv samsung PDF

    tps51620

    Abstract: alc889 bq24721 tps51125 ITE8512E C5134 TI_BQ24721C_QFN_32P INVENTEC JMB385 fds8884
    Text: www.kythuatvitinh.com KiliManjaro CS Build A02 2008.02.04 Digitally signed by dd DN: cn=dd, o=dd, ou=dd, email=dddd@yahoo. com, c=US Date: 2009.11.29 17:18:29 +07'00' EE DATE POWER DATE DRAWER DESIGN CHECK RESPONSIBLE DATE CHANGE NO. REV 3 SIZE = FILE NAME : XXXX-XXXXXX-XX


    Original
    23-Oct-2007 tps51620 alc889 bq24721 tps51125 ITE8512E C5134 TI_BQ24721C_QFN_32P INVENTEC JMB385 fds8884 PDF

    Marvell 88E8055

    Abstract: keyboard and touchpad schematic CIS10J270NC p23 343 B530 Socket AM2 intel g41 ich9 88E8040 SAMSUNG ELECTRONICS BA41
    Text: 4 3 2 1 SAMSUNG PROPRIETARY THIS DOCUMENT CONTAINS CONFIDENTIAL PROPRIETARY INFORMATION THAT IS SAMSUNG ELECTRONICS CO’S PROPERTY. DO NOT DISCLOSE TO OR DUPLICATE FOR OTHERS EXCEPT AS AUTHORIZED BY SAMSUNG. Table of Contents D XI’AN-MV CPU :INTEL MEROM/PENRYN


    Original
    BA41-00926A/00927A Alc262 Sheet45 Sheet46 Isl6256a Sheet47 Sheet48 Sheet49 Isl6266a Marvell 88E8055 keyboard and touchpad schematic CIS10J270NC p23 343 B530 Socket AM2 intel g41 ich9 88E8040 SAMSUNG ELECTRONICS BA41 PDF

    tps51125

    Abstract: alc889 c2233 fds8884 bq24721 BQ24721C Inventec IT8512E tps51125 kbc AR8121
    Text: TETON2 DDRIII-Pre MV BUILD 2008.06.18 EE DATE DATE POWER DRAWER DESIGN CHECK RESPONSIBLE DATE CHANGE NO. REV 3 SIZE = FILE NAME : XXXX-XXXXXX-XX XXXXXXXXXXXX P/N INVENTEC TITLE VER : TETON2 SIZE CODE A3 CS SHEET DOC. NUMBER REV 1310A22077-0-MTRA02 1 OF 53


    Original
    1310A22077-0-MTRA02 R5000 R5002 D5002 S3048 PAD506 S3049 D4001 R4001 R4000 tps51125 alc889 c2233 fds8884 bq24721 BQ24721C Inventec IT8512E tps51125 kbc AR8121 PDF

    37 TV samsung lcd Schematic circuit diagram

    Abstract: smd 475 20k 233 DIODE samsung lcd tv power supply schematic pcb circuit diagram of crt tv samsung BB509 ICSL6256 BA41-01039A schematic diagram crt tv samsung schematic Samsung TV led backlight AP4435
    Text: - 이 문서는 삼성전자의 기술 자산으로 승인자만이 사용할 수 있습니다 - This Document can not be used without Samsung's authorization - 8. Block Diagram and Schematic D C B A 4 SAMSUNG PROPRIETARY THIS DOCUMENT CONTAINS CONFIDENTIAL


    Original
    BA41-01039A BA41-01040A BA41-01041A BA41-01039A /Users/mobile29/mentor/Bonn/BONN-INT 37 TV samsung lcd Schematic circuit diagram smd 475 20k 233 DIODE samsung lcd tv power supply schematic pcb circuit diagram of crt tv samsung BB509 ICSL6256 schematic diagram crt tv samsung schematic Samsung TV led backlight AP4435 PDF

    12c675

    Abstract: 8541P Inventec tpa6017 sc1470I LPC47N249 *8541p L1019 R502 3443 070435FR015
    Text: Approvals Revisions REV ECN NO. Description Of Change DATE DFTG. ENGR. REL. TABLE OF CONTENTS PAGE 4 - CLOCK GENERATOR 5-7 - BANIAS PROCESSOR 8-10 - ODEM 11-14 - DDR 15-18 - ATI_M10_P 19-20 - VGA DDR 21 -LCD INTERFACE 22-24- ICH4-M 25 - HDD CONNECTOR 26 - CD-ROM CONNECTOR


    Original
    BLM11A121S C2507 C2505 R2502 R2509 127107MH020G200ZT FIX2501 FIX2502 FIX2500 S2501 12c675 8541P Inventec tpa6017 sc1470I LPC47N249 *8541p L1019 R502 3443 070435FR015 PDF

    RDD 17-33

    Abstract: 1211 1A80 csacv16m 1A49 1A30R P21SF p7706 1tm4
    Text: 1 FJUL66525-01 L66525 ファミリ ユーザーズマニュアル CMOS 16 ビットマイクロコントローラ 第 3 版 2001 年 12 月作成 ご注意 1. 本書に記載された内容は製品改善及び技術改良等により将来予告なしに変更することがあります。したがって、


    Original
    FJUL66525-01 L66525 Copyright2001OKIELECTRICINDUSTRYCO. ML66525 nX-8/500S CC665S RDD 17-33 1211 1A80 csacv16m 1A49 1A30R P21SF p7706 1tm4 PDF

    HYB514100BJ-70

    Abstract: L-SIM-30-1 hyb 511
    Text: Summary of Types SIEM ENS Summary of Types Type Ordering Code Package Description Q67100-Q512 Q67100-Q427 Q67100-Q428 Q67100-Q518 067100-0519 Q67100-Q520 Q67100-Q521 Q67100-Q522 Q67100-Q523 Q67100-Q524 Q67100-Q525 Q67100-Q526 Q67100-Q527 Q67100-Q528 Q67100-Q529


    OCR Scan
    511000B-60 5110OOB-70 511000B-80 511000BJ-6Q 511000BJ-70 5110Q0BJ-80 511000BZ-60 511000BZ-70 511000BZ-80 511000BL-60 HYB514100BJ-70 L-SIM-30-1 hyb 511 PDF

    Q67100-Q765

    Abstract: 32200S-70 Q67100-Q470 94500S-70 514256B-80 Q67100-Q840 Q67100-Q914 Q67100-Q437 322120S-70
    Text: SIEM EN S Summary of Types in Alphanumerical Order Summary of Types in Alphanumerical Order Type Ordering Code Page Q67100-Q512 Q67100-Q427 Q67100-Q428 Q67100-Q518 Q67100-Q519 Q67100-Q520 Q67100-Q526 Q67100-Q527 Q67100-Q524 Q67100-Q525 Q67100-Q521 Q67100-Q522


    OCR Scan
    511000B-60 511000B-70 511000B-80 511000BJ-60 511000BJ-70 51100QBJ-80 511000BJL-6Q 511000BJL-70 511000BL-60 511000BL-70 Q67100-Q765 32200S-70 Q67100-Q470 94500S-70 514256B-80 Q67100-Q840 Q67100-Q914 Q67100-Q437 322120S-70 PDF