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

    SN74AS02D Search Results

    SN74AS02D Result Highlights (2)

    Part ECAD Model Manufacturer Description Download Buy
    SN74AS02D Texas Instruments Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Visit Texas Instruments Buy
    SN74AS02DR Texas Instruments Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Visit Texas Instruments Buy
    SF Impression Pixel

    SN74AS02D Price and Stock

    Texas Instruments SN74AS02D

    IC GATE NOR 4CH 2-INP 14SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74AS02D Tube 250 1
    • 1 $2.81
    • 10 $2.099
    • 100 $1.7254
    • 1000 $1.63196
    • 10000 $1.63196
    Buy Now
    Verical SN74AS02D 19,200 213
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.6
    • 10000 $1.6
    Buy Now
    SN74AS02D 3,750 213
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.6
    • 10000 $1.6
    Buy Now
    SN74AS02D 250 213
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.6
    • 10000 $1.6
    Buy Now
    Quest Components SN74AS02D 7,421
    • 1 $3.015
    • 10 $3.015
    • 100 $3.015
    • 1000 $3.015
    • 10000 $1.0553
    Buy Now
    Rochester Electronics SN74AS02D 23,300 1
    • 1 $1.5
    • 10 $1.5
    • 100 $1.41
    • 1000 $1.28
    • 10000 $1.28
    Buy Now
    ComSIT USA SN74AS02D 46
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Rochester Electronics LLC SN74AS02D

    IC GATE NOR 4CH 2-INP 14SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74AS02D Bulk 193
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.56
    • 10000 $1.56
    Buy Now

    Rochester Electronics LLC SN74AS02DR

    IC GATE NOR 4CH 2-INP 14SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74AS02DR Bulk 260
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.15
    • 10000 $1.15
    Buy Now

    Texas Instruments SN74AS02DR

    IC GATE NOR 4CH 2-INP 14SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74AS02DR Reel 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $1.1046
    Buy Now
    SN74AS02DR Cut Tape 1
    • 1 $2.15
    • 10 $2.15
    • 100 $2.15
    • 1000 $2.15
    • 10000 $2.15
    Buy Now
    SN74AS02DR Digi-Reel 1
    • 1 $2.15
    • 10 $2.15
    • 100 $2.15
    • 1000 $2.15
    • 10000 $2.15
    Buy Now
    Mouser Electronics SN74AS02DR
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $1.17
    Get Quote
    Verical SN74AS02DR 7,500 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.3625
    • 10000 $1.3625
    Buy Now
    SN74AS02DR 5,000 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.3625
    • 10000 $1.3625
    Buy Now
    SN74AS02DR 4,900 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.3625
    • 10000 $1.3625
    Buy Now
    SN74AS02DR 4,400 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.3625
    • 10000 $1.3625
    Buy Now
    SN74AS02DR 2,500 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.3625
    • 10000 $1.3625
    Buy Now
    SN74AS02DR 406 250
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.3625
    • 10000 $1.3625
    Buy Now
    Bristol Electronics SN74AS02DR 3,764
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Rochester Electronics SN74AS02DR 24,706 1
    • 1 $1.28
    • 10 $1.28
    • 100 $1.2
    • 1000 $1.09
    • 10000 $1.09
    Buy Now

    Others SN74AS02D

    INSTOCK
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Chip 1 Exchange SN74AS02D 178
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    SN74AS02D Datasheets (23)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    SN74AS02D Texas Instruments QUADRUPLE 2-INPUT POSITIVE-NOR GATES Original PDF
    SN74AS02D Texas Instruments Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02D Texas Instruments SN74AS02 - Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02D Texas Instruments Logic - Gates and Inverters, Integrated Circuits (ICs), IC GATE NOR 4CH 2-INP 14-SOIC Original PDF
    SN74AS02D Unknown Historical semiconductor price guide (US$ - 1998). From our catalog scanning project. Historical PDF
    SN74AS02DE4 Texas Instruments Quadruple 2-Input Positive-NOR Gates Original PDF
    SN74AS02DE4 Texas Instruments Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DE4 Texas Instruments SN74AS02 - Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DE4 Texas Instruments Logic - Gates and Inverters, Integrated Circuits (ICs), IC GATE NOR 4CH 2-INP 14-SOIC Original PDF
    SN74AS02DG4 Texas Instruments Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DG4 Texas Instruments SN74AS02 - Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DG4 Texas Instruments Logic - Gates and Inverters, Integrated Circuits (ICs), IC GATE NOR 4CH 2-INP 14-SOIC Original PDF
    SN74AS02DR Texas Instruments QUADRUPLE 2-INPUT POSITIVE-NOR GATES Original PDF
    SN74AS02DR Texas Instruments Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DR Texas Instruments SN74AS02 - Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DR Texas Instruments Logic - Gates and Inverters, Integrated Circuits (ICs), IC GATE NOR 4CH 2-INP 14-SOIC Original PDF
    SN74AS02DRE4 Texas Instruments Quadruple 2-Input Positive-NOR Gates Original PDF
    SN74AS02DRE4 Texas Instruments Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DRE4 Texas Instruments SN74AS02 - Quadruple 2-Input Positive-NOR Gates 14-SOIC 0 to 70 Original PDF
    SN74AS02DRE4 Texas Instruments Logic - Gates and Inverters, Integrated Circuits (ICs), IC GATE NOR 4CH 2-INP 14-SOIC Original PDF

    SN74AS02D Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    5962-86844012A

    Abstract: 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil 5962-86844012A 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    5962-86844012A

    Abstract: 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil 5962-86844012A 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02 PDF

    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
    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 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    5962-86844012A

    Abstract: 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil 5962-86844012A 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 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

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    5962-86844012A

    Abstract: 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil 5962-86844012A 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 PDF

    msl 9350

    Abstract: No abstract text available
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B 300-mil SN54AS02 SN74AS02 msl 9350 PDF

    c5088 transistor

    Abstract: transistor C3207 TLO84CN sec c5088 IN5355B D2817A C3207 transistor toshiba f630 TLO81CP MC74HC533N
    Text: Transistor - Diode Cross Reference - H.P. Part Numbers to JEDEC Numbers Part Num. 1820-0225 1820-0240 1820-0352 1820-1804 1821-0001 1821-0002 1821-0006 1850-0062 1850-0064 1850-0075 1850-0076 1850-0093 1850-0099 1850-0126 1850-0137 1850-0150 1850-0151 1850-0154


    Original
    1853IMPATT c5088 transistor transistor C3207 TLO84CN sec c5088 IN5355B D2817A C3207 transistor toshiba f630 TLO81CP MC74HC533N PDF

    5962-86844012A

    Abstract: 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2ĆINPUT POSITIVEĆNOR GATES ą SDAS111B − APRIL 1982 − REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil 5962-86844012A 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02 PDF

    5962-86844012A

    Abstract: 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02
    Text: SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES SDAS111B – APRIL 1982 – REVISED DECEMBER 1994 • SN54ALS02A, SN54AS02 . . . J PACKAGE SN74ALS02A, SN74AS02 . . . D OR N PACKAGE TOP VIEW Package Options Include Plastic


    Original
    SN54ALS02A, SN54AS02, SN74ALS02A, SN74AS02 SDAS111B SN54AS02 300-mil 5962-86844012A 5962-8684401DA SN54ALS02A SN54AS02 SN74ALS02A SN74AS02 PDF