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

    SN75C23243 Search Results

    SN75C23243 Result Highlights (4)

    Part ECAD Model Manufacturer Description Download Buy
    SN75C23243DGGR Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-TSSOP 0 to 70 Visit Texas Instruments Buy
    SN75C23243CDGGR Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-TSSOP Visit Texas Instruments
    SN75C23243CDLR Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-SSOP Visit Texas Instruments
    SN75C23243DLR Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-SSOP 0 to 70 Visit Texas Instruments Buy
    SF Impression Pixel

    SN75C23243 Price and Stock

    Rochester Electronics LLC SN75C23243DL

    IC TRANSCEIVER FULL 6/10 48SSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN75C23243DL Tube 53
    • 1 -
    • 10 -
    • 100 $5.67
    • 1000 $5.67
    • 10000 $5.67
    Buy Now

    Texas Instruments SN75C23243DLR

    IC TRANSCEIVER FULL 6/10 48SSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN75C23243DLR Digi-Reel 1
    • 1 $5.68
    • 10 $5.68
    • 100 $5.68
    • 1000 $5.68
    • 10000 $5.68
    Buy Now
    SN75C23243DLR Cut Tape 1
    • 1 $5.68
    • 10 $5.68
    • 100 $5.68
    • 1000 $5.68
    • 10000 $5.68
    Buy Now
    SN75C23243DLR Reel 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $3.00051
    • 10000 $2.85049
    Buy Now
    Mouser Electronics SN75C23243DLR
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.98
    • 10000 $2.87
    Get Quote
    Verical SN75C23243DLR 1,684 109
    • 1 -
    • 10 -
    • 100 -
    • 1000 $3.1375
    • 10000 $3.1375
    Buy Now
    SN75C23243DLR 960 109
    • 1 -
    • 10 -
    • 100 -
    • 1000 $3.1375
    • 10000 $3.1375
    Buy Now
    Rochester Electronics SN75C23243DLR 2,644 1
    • 1 $2.95
    • 10 $2.95
    • 100 $2.77
    • 1000 $2.51
    • 10000 $2.51
    Buy Now

    Rochester Electronics LLC SN75C23243DLR

    IC TRANSCEIVER FULL 6/10 48SSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN75C23243DLR Bulk 98
    • 1 -
    • 10 -
    • 100 $3.07
    • 1000 $3.07
    • 10000 $3.07
    Buy Now

    Texas Instruments SN75C23243DGGR

    IC TRANSCEIVER FULL 6/10 48TSSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN75C23243DGGR Digi-Reel 1
    • 1 $5.31
    • 10 $5.31
    • 100 $5.31
    • 1000 $5.31
    • 10000 $5.31
    Buy Now
    SN75C23243DGGR Cut Tape 1
    • 1 $5.31
    • 10 $5.31
    • 100 $5.31
    • 1000 $5.31
    • 10000 $5.31
    Buy Now
    SN75C23243DGGR Reel 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $2.66511
    Buy Now
    Mouser Electronics SN75C23243DGGR
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $2.66
    Get Quote

    Texas Instruments SN75C23243DL

    Line Transceiver, 6 Func, 6 Driver, 10 Rcvr, PDSO48 '
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Rochester Electronics SN75C23243DL 1,000 1
    • 1 $5.45
    • 10 $5.45
    • 100 $5.12
    • 1000 $4.63
    • 10000 $4.63
    Buy Now

    SN75C23243 Datasheets (18)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    SN75C23243 Texas Instruments 3-V to 5.5-V Dual RS-232 Port Original PDF
    SN75C23243DGG Texas Instruments 3 V to 5.5 V Dual RS-232 Port Original PDF
    SN75C23243DGG Texas Instruments SN75C23243 - IC HEX LINE TRANSCEIVER, PDSO48, PLASTIC, TSSOP-48, Line Driver or Receiver Original PDF
    SN75C23243DGGE4 Texas Instruments SN75C23243 - IC HEX LINE TRANSCEIVER, PDSO48, PLASTIC, TSSOP-48, Line Driver or Receiver Original PDF
    SN75C23243DGGR Texas Instruments 3 V to 5.5 V Dual RS-232 Port Original PDF
    SN75C23243DGGR Texas Instruments 3-V to 5.5-V Dual RS-232 Port Original PDF
    SN75C23243DGGR Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-TSSOP 0 to 70 Original PDF
    SN75C23243DGGRE4 Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-TSSOP 0 to 70 Original PDF
    SN75C23243DGGRE4 Texas Instruments 3-V to 5.5-V Dual RS-232 Port Original PDF
    SN75C23243DGGRG4 Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-TSSOP 0 to 70 Original PDF
    SN75C23243DL Texas Instruments 3 V to 5.5 V Dual RS-232 Port Original PDF
    SN75C23243DL Texas Instruments 3-V to 5.5-V Dual RS-232 Port Original PDF
    SN75C23243DL Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-SSOP 0 to 70 Original PDF
    SN75C23243DLG4 Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-SSOP 0 to 70 Original PDF
    SN75C23243DLR Texas Instruments 3 V to 5.5 V Dual RS-232 Port Original PDF
    SN75C23243DLR Texas Instruments 3-V to 5.5-V Dual RS-232 Port Original PDF
    SN75C23243DLR Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-SSOP 0 to 70 Original PDF
    SN75C23243DLRG4 Texas Instruments 3-V to 5.5-V Dual RS-232 Port 48-SSOP 0 to 70 Original PDF

    SN75C23243 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    Untitled

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 DGG OR DL PACKAGE TOP VIEW D Single-Chip and Single-Supply Interface for D D D D D D D D D D D Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 SLLS513A TIA/EIA-232-F RS-232

    SN65C23243

    Abstract: SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232 SN65C23243 SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR

    SN65C23243

    Abstract: SN65C23243DGG SN65C23243DL SN75C23243 SN75C23243DGG SN75C23243DL
    Text: SN65C23243, SN75C23243 3-V TO 5.5-V DUAL RS-232 PORT SLLS513 – AUGUST 2001 D D D D D D D D D D D D D Single-Chip and Single-Supply Interface for Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of TIA/EIA-232-F and ITU v.28 Standards Operate With 3-V to 5.5-V VCC Supply


    Original
    PDF SN65C23243, SN75C23243 RS-232 SLLS513 TIA/EIA-232-F SN65C23243 SN65C23243DGG SN65C23243DL SN75C23243 SN75C23243DGG SN75C23243DL

    Untitled

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232

    Untitled

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232

    Untitled

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232

    Untitled

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232

    SN65C23243

    Abstract: SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232 SN65C23243 SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR

    inv 10

    Abstract: SN65C23243 SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232 inv 10 SN65C23243 SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR

    SN65C23243

    Abstract: SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232 SN65C23243 SN65C23243DL SN75C23243 SN75C23243DGGR SN75C23243DL SN75C23243DLR

    Untitled

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232

    Untitled

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3-V TO 5.5-V DUAL RS-232 PORT SLLS513 – AUGUST 2001 D D D D D D D D D D D D D Single-Chip and Single-Supply Interface for Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of TIA/EIA-232-F and ITU v.28 Standards Operate With 3-V to 5.5-V VCC Supply


    Original
    PDF SN65C23243, SN75C23243 RS-232 SLLS513 TIA/EIA-232-F Op4/22/2002) SN75C23243DGGR SN75C23243DLR

    65C23243

    Abstract: No abstract text available
    Text: SN65C23243, SN75C23243 3ĆV TO 5.5ĆV DUAL RSĆ232 PORT ą ą SLLS513A − AUGUST 2001 − REVISED MARCH 2004 D Single-Chip and Single-Supply Interface for D D D D D D D D D D D DGG OR DL PACKAGE TOP VIEW Two IBM PC/AT Serial Ports Meet or Exceed the Requirements of


    Original
    PDF SN65C23243, SN75C23243 RS232 SLLS513A TIA/EIA-232-F RS-232 65C23243

    MAX3234

    Abstract: maxim dallas 2501 jtag gd75232 DALLAS 2501 jtag PL-2303 LGA 775 SOCKET PIN LAYOUT SN75176 PL-2303 SN75179 application MAX490 schematic
    Text: R E A L W O R L D S I G N A L P TM R O C E S S I N G Interface Selection Guide 2Q 2004 Table of Contents Introduction .3 Data Line Circuits High-Speed Interconnect LVDS, xECL, CML .4


    Original
    PDF RS-485/422. RS-232. MAX3234 maxim dallas 2501 jtag gd75232 DALLAS 2501 jtag PL-2303 LGA 775 SOCKET PIN LAYOUT SN75176 PL-2303 SN75179 application MAX490 schematic

    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

    HDMI TO VGA MONITOR PINOUT

    Abstract: HDMI to vga pinout china DVD player card circuit diagram serdes hdmi optical fibre mp3 player circuit diagram by using msp430 PL-2303 SN75179 application VGA TO HDMI PINOUT meter-bus HDMI cat5
    Text: TM Technology for Innovators Interface Selection Guide 4Q 2006 2 ➔ Interface Selection Guide Table of Contents Introduction 3 LVDS, xECL, CML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Multipoint-LVDS M-LVDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8


    Original
    PDF RS-485/422 RS-232 HDMI TO VGA MONITOR PINOUT HDMI to vga pinout china DVD player card circuit diagram serdes hdmi optical fibre mp3 player circuit diagram by using msp430 PL-2303 SN75179 application VGA TO HDMI PINOUT meter-bus HDMI cat5

    smoke alarm using IC NE 555

    Abstract: videophone pt100 amplifier schematic ina103 pt100 msp430 schematic ads1232 weigh scale schematic motor driver full bridge 10A with uc3638 rtd pt100 interface to 8051 3 phase dc converter afe circuit diagram igbt 24v 10A tl494 TEC H bridge that use uc3638 IC
    Text: Industrial Solutions Guide Amplifiers, Data Converters, Digital Signal Processors, Digital Temperature Sensors, Interface, Microcontrollers, Power Controllers, Power Management 1Q 2006 ➔ Inside Intelligent Sensors 4 Motor Control 19 Security 24 Test and Measurement


    Original
    PDF

    tmds specification

    Abstract: ADM2209 HDMI TO VGA MONITOR PINOUT HVGA TFT LCD driver VMEH22501 MAX202 circuit diagram tlk10021 rs422 msp430 diagram LG LCD TV circuits PL-2303
    Text: 接口选择指南 2006 年第四季度 2 接口选择指南 目录 3 绪论 下载最新的模拟应用 LVDSxECL、CML(低电压差分信号传输、发射级耦合逻辑、电流模式逻辑)………4 期刊 以及过刊 ,让 多点式低电压差分信号传输 (M-LVDS) ……………………………………………………8


    Original
    PDF RS-485/422 RS-232. tmds specification ADM2209 HDMI TO VGA MONITOR PINOUT HVGA TFT LCD driver VMEH22501 MAX202 circuit diagram tlk10021 rs422 msp430 diagram LG LCD TV circuits PL-2303

    4x4 matrix keypad and microcontroller

    Abstract: RGB to vga Converter intersil LGA 775 Socket PIN layout PL-2303 LVDS to MIPI CSI HDMI TO VGA MONITOR PINOUT rs 485 multidrop full duplex master slave microcontroller serdes 8b 10b mipi diagram LG LCD TV circuits MC100LVEL23
    Text: I nt er fa Interface Guide ce 1394 CAN Crosspoint Display ESD/EMI I²C Isolation LVDS/M-LVDS The Real World Optoelectronics Temperature PCIe Position RS232/422/485 Logic Low Power RF Pressure Power Management Speed Flow SerDes Sound UARTs RF Wave USB Data


    Original
    PDF RS232/422/485 4x4 matrix keypad and microcontroller RGB to vga Converter intersil LGA 775 Socket PIN layout PL-2303 LVDS to MIPI CSI HDMI TO VGA MONITOR PINOUT rs 485 multidrop full duplex master slave microcontroller serdes 8b 10b mipi diagram LG LCD TV circuits MC100LVEL23

    Dallas SN75176

    Abstract: 16-channel darlington array SN75179 application Sn75176 RS-232 to SPI converter MAX232 MC34051 mc34050 IR TRANSRECEIVER wireless extender for ir remote control transmitter AM26LS32
    Text: NINTH EDITION Analog Master Selection Guide October 2003 Interface Products 1996, 1997, 1999, 2000, 2001, 2002, 2003 Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries TI reserve the right to make corrections, modifications,


    Original
    PDF TIR1000 Dallas SN75176 16-channel darlington array SN75179 application Sn75176 RS-232 to SPI converter MAX232 MC34051 mc34050 IR TRANSRECEIVER wireless extender for ir remote control transmitter AM26LS32

    LVC161284

    Abstract: Abstract schematic power transistor SN65LVDS100 Application Report SLLA067A PCI21 datasheet compaq notebook cable lcd 14.1 Spectrum VME64 "USB Streaming Controller" modbus code pic RS232 MECHANICAL MOUSE
    Text: Application Report SLLA067A - March 2000−Revised February 2004 Comparing Bus Solutions Georg Becke, Christian Borgert, Steve Corrigan, Frank Dehmelt, Matthias Feulner, Carmen Gonzalez, Michael Groenebaum, Firoj Kabir, Arek Kacprzak, Clark Kinnaird, Johann Zipperer


    Original
    PDF SLLA067A 2000-Revised LVC161284 Abstract schematic power transistor SN65LVDS100 Application Report PCI21 datasheet compaq notebook cable lcd 14.1 Spectrum VME64 "USB Streaming Controller" modbus code pic RS232 MECHANICAL MOUSE

    schematic diagram 48v dc convertor tl3845

    Abstract: sg3524 spice model for pspice schematic diagram 48v ac regulator uc3842 schematic diagram inverter 12v to 24v 30a audio Amp. mosfet 1000 watt 24v dc motor speed control lm324 mini-LVDS and TFT-LCD Timing Controller sg3524 spice model UC1825 spice 500 watt power circuit diagram uc3825
    Text: Selection Guide EIGHTH EDITION Analog/Mixed-Signal Products Designer’s Master Selection Guide August 2002 1996, 1997, 1999, 2000, 2001, 2002 Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries TI reserve the right to make corrections, modifications,


    Original
    PDF A060502 schematic diagram 48v dc convertor tl3845 sg3524 spice model for pspice schematic diagram 48v ac regulator uc3842 schematic diagram inverter 12v to 24v 30a audio Amp. mosfet 1000 watt 24v dc motor speed control lm324 mini-LVDS and TFT-LCD Timing Controller sg3524 spice model UC1825 spice 500 watt power circuit diagram uc3825

    maxim dallas 2501

    Abstract: jtag PL-2303 DALLAS 2501 RS-485 spice PL-2303 goldstar GM16c550 MC34051 circuit diagram of MAX232 connection to pic goldstar scheme jtag gd75232
    Text: TM Technology for Innovators Interface Selection Guide 3Q 2005 2 ➔ Interface Selection Guide Table of Contents Introduction 3 LVDS, xECL, CML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Multipoint-LVDS M-LVDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8


    Original
    PDF RS-485/422 RS-232 SSZT009B maxim dallas 2501 jtag PL-2303 DALLAS 2501 RS-485 spice PL-2303 goldstar GM16c550 MC34051 circuit diagram of MAX232 connection to pic goldstar scheme jtag gd75232

    ADS7924

    Abstract: TRF3761-E CDCLVC1102 INA3221
    Text: Analog Signal Chain Guide Amplifiers Data Converters Interface Clocks and Timing Sensing Wireless Connectivity www.ti.com 2013 Analog Signal Chain Guide Table of Contents Overview. 3 Interface Amplifiers and Comparators


    Original
    PDF