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

    SN74ALS258A Search Results

    SN74ALS258A Result Highlights (1)

    Part ECAD Model Manufacturer Description Download Buy
    SN74ALS258AN Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-PDIP 0 to 70 Visit Texas Instruments Buy
    SF Impression Pixel

    SN74ALS258A Price and Stock

    Texas Instruments SN74ALS258AN

    IC MULTIPLEXER 4 X 2:1 16DIP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74ALS258AN Tube 113 1
    • 1 $5.03
    • 10 $3.837
    • 100 $3.2081
    • 1000 $2.87869
    • 10000 $2.7965
    Buy Now
    Mouser Electronics SN74ALS258AN
    • 1 -
    • 10 -
    • 100 -
    • 1000 $3.54
    • 10000 $3.54
    Get Quote
    Bristol Electronics SN74ALS258AN 48
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Rochester Electronics SN74ALS258AN 39,394 1
    • 1 $3.73
    • 10 $3.73
    • 100 $3.51
    • 1000 $3.17
    • 10000 $3.17
    Buy Now

    Rochester Electronics LLC SN74ALS258AN

    SN74ALS258A QUADRUPLE 2-LINE TO
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74ALS258AN Bulk 90
    • 1 -
    • 10 -
    • 100 $3.37
    • 1000 $3.37
    • 10000 $3.37
    Buy Now

    Rochester Electronics LLC SN74ALS258AD

    IC MULTIPLEXER 4 X 2:1 16SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74ALS258AD Bulk 105
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.88
    • 10000 $2.88
    Buy Now

    Texas Instruments SN74ALS258ADR

    IC MULTIPLEXER 4 X 2:1 16SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74ALS258ADR Reel 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $1.81104
    Buy Now
    Rochester Electronics SN74ALS258ADR 57,000 1
    • 1 $1.59
    • 10 $1.59
    • 100 $1.49
    • 1000 $1.35
    • 10000 $1.35
    Buy Now

    Rochester Electronics LLC SN74ALS258ADR

    IC MULTIPLEXER 4 X 2:1 16SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74ALS258ADR Bulk 182
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.65
    • 10000 $1.65
    Buy Now

    SN74ALS258A Datasheets (32)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    SN74ALS258A Texas Instruments Quadruple 2-Line To 1-Line Data Selectors-Multiplexers With 3-State Outputs Original PDF
    SN74ALS258AD Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258AD Texas Instruments QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS Original PDF
    SN74ALS258AD Texas Instruments SN74ALS258 - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADE4 Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADE4 Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs Original PDF
    SN74ALS258ADE4 Texas Instruments SN74ALS258 - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADG4 Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADG4 Texas Instruments SN74ALS258 - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADR Texas Instruments QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS Original PDF
    SN74ALS258ADR Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADR Texas Instruments SN74ALS258 - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADRE4 Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADRE4 Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs Original PDF
    SN74ALS258ADRE4 Texas Instruments SN74ALS258 - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADRG4 Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258ADRG4 Texas Instruments SN74ALS258 - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70 Original PDF
    SN74ALS258AN Texas Instruments QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS Original PDF
    SN74ALS258AN Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-PDIP 0 to 70 Original PDF
    SN74ALS258AN Texas Instruments SN74ALS258 - Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-PDIP 0 to 70 Original PDF

    SN74ALS258A Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    SN54ALS257A

    Abstract: SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C SN54ALS258A SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    SN54ALS257A

    Abstract: SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C SN54ALS258A SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    5962-88626012A

    Abstract: SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil 5962-88626012A SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    SN54ALS257A

    Abstract: SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C SN54ALS258A SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    5962-88626012A

    Abstract: SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil 5962-88626012A SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    SN54ALS257

    Abstract: SN54ALS258 SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257, SN54ALS258, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124B – APRIL 1982 – REVISED DECEMBER 1994 • A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed to


    Original
    SN54ALS257, SN54ALS258, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124B SN54ALS258 SN54ALS257 SN54ALS258 SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    5962-88626012A

    Abstract: SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C SN54ALS258A 5962-88626012A SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2ĆLINE TO 1ĆLINE DATA SELECTORS/MULTIPLEXERS WITH 3ĆSTATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 D 3-State Outputs Interface Directly With A/B 1A 1B 1Y 2A


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C 300-mil SN54ALS258A PDF

    5962-88626012A

    Abstract: SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124C – APRIL 1982 – REVISED AUGUST 1996 D A/B 1A 1B 1Y 2A 2B 2Y GND description These data selectors/multiplexers are designed


    Original
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124C SN54ALS258A 5962-88626012A SN54ALS257A SN54ALS258A SN74ALS257A SN74ALS258A SN74AS257 SN74AS258 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257, SN54ALS258, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124B - APRIL 1982 - REVISED DECEMBER 1994 3-State Outputs Interface Directly With System Bus SN54ALS257, SN54ALS258 . . . J PACKAGE


    OCR Scan
    SN54ALS257, SN54ALS258, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124B 300-mil SN54ALS257 SN54ALS2FORMS PDF

    74as257

    Abstract: No abstract text available
    Text: SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS S D A S 124C - A P R IL 1982 - R EVISED A U G U S T 1996 3-State Outputs Interface Directly With System Bus


    OCR Scan
    SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 300-mil SN54ALS258A 74as257 PDF

    Untitled

    Abstract: No abstract text available
    Text: SN54ALS257, SN54ALS258, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS124B - APRIL 1982 - REVISED DECEMBER 1994 3-State Outputs Interface Directly With System Bus Provide Bus Interface From Multiple


    OCR Scan
    SN54ALS257, SN54ALS258, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 SDAS124B 300-mll SN54ALS257 SN54ALS25OLTAGE PDF