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

    SN74BCT541 Search Results

    SN74BCT541 Result Highlights (4)

    Part ECAD Model Manufacturer Description Download Buy
    SN74BCT541ADW
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Visit Texas Instruments Buy
    SN74BCT541ADWR
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Visit Texas Instruments Buy
    SN74BCT541AN
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-PDIP 0 to 70 Visit Texas Instruments Buy
    SN74BCT541ANSR
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SO 0 to 70 Visit Texas Instruments Buy

    SN74BCT541 Datasheets (41)

    Texas Instruments
    Part ECAD Model Manufacturer Description Datasheet Type PDF PDF Size Page count
    SN74BCT541A
    Texas Instruments Octal Buffers-Drivers With 3-State Outputs Original PDF 81.55KB 5
    SN74BCT541A
    Texas Instruments OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS Original PDF 107.26KB 5
    SN74BCT541ADBR
    Texas Instruments SN74BCT541A - Octal Buffers/Drivers With 3-State Outputs 20-SSOP Original PDF 1.66MB 28
    SN74BCT541ADW
    Texas Instruments SN74BCT541 - Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 1.66MB 28
    SN74BCT541ADW
    Texas Instruments OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS Original PDF 81.54KB 5
    SN74BCT541ADW
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 655.79KB 15
    SN74BCT541ADW
    Texas Instruments Octal Buffer/Driver with 3-State Outputs Original PDF 297.72KB 11
    SN74BCT541ADWE4
    Texas Instruments SN74BCT541 - Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 1.66MB 28
    SN74BCT541ADWE4
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 655.79KB 15
    SN74BCT541ADWE4
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs Original PDF 491.58KB 13
    SN74BCT541ADWG4
    Texas Instruments SN74BCT541 - Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 1.66MB 28
    SN74BCT541ADWG4
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 655.79KB 15
    SN74BCT541ADWR
    Texas Instruments SN74BCT541 - Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 1.66MB 28
    SN74BCT541ADWR
    Texas Instruments OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS Original PDF 81.53KB 5
    SN74BCT541ADWR
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 655.79KB 15
    SN74BCT541ADWR
    Texas Instruments Octal Buffer/Driver with 3-State Outputs Original PDF 297.72KB 11
    SN74BCT541ADWRE4
    Texas Instruments SN74BCT541 - Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 1.66MB 28
    SN74BCT541ADWRE4
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 655.79KB 15
    SN74BCT541ADWRE4
    Texas Instruments Octal Buffers/Drivers With 3-State Outputs Original PDF 491.58KB 13
    SN74BCT541ADWRG4
    Texas Instruments SN74BCT541 - Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70 Original PDF 1.66MB 28
    SF Impression Pixel

    SN74BCT541 Price and Stock

    Texas Instruments

    Texas Instruments SN74BCT541ADBR

    Buffer/Line Driver 8-CH Non-Inverting 3-ST BiCMOS 20-Pin SSOP T/R
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Verical SN74BCT541ADBR 5,396 165
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.04
    • 10000 $1.93
    Buy Now
    Rochester Electronics SN74BCT541ADBR 5,396 1
    • 1 -
    • 10 -
    • 100 $1.82
    • 1000 $1.63
    • 10000 $1.54
    Buy Now
    Vyrian SN74BCT541ADBR 9,688
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Texas Instruments SN74BCT541AN

    Buffer/Line Driver 8-CH Non-Inverting 3-ST 20-Pin PDIP Tube
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Verical SN74BCT541AN 4,089 88
    • 1 -
    • 10 -
    • 100 $4.08
    • 1000 $3.65
    • 10000 $3.42
    Buy Now
    Mouser Electronics SN74BCT541AN 73
    • 1 $6.20
    • 10 $4.49
    • 100 $4.00
    • 1000 $3.81
    • 10000 $3.81
    Buy Now
    Arrow Electronics SN74BCT541AN 80 26 Weeks 20
    • 1 -
    • 10 -
    • 100 $3.02
    • 1000 $3.02
    • 10000 $3.02
    Buy Now
    Quest Components SN74BCT541AN 60
    • 1 $3.60
    • 10 $2.40
    • 100 $1.80
    • 1000 $1.80
    • 10000 $1.80
    Buy Now
    Rochester Electronics SN74BCT541AN 4,169 1
    • 1 -
    • 10 -
    • 100 $3.26
    • 1000 $2.92
    • 10000 $2.74
    Buy Now
    TME SN74BCT541AN 1
    • 1 $4.80
    • 10 $3.86
    • 100 $3.13
    • 1000 $2.71
    • 10000 $2.71
    Get Quote
    Vyrian SN74BCT541AN 7,306
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Texas Instruments SN74BCT541ADW

    Buffer/Line Driver 8-CH Non-Inverting 3-ST 20-Pin SOIC Tube
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Verical () SN74BCT541ADW 1,150 91
    • 1 -
    • 10 -
    • 100 $3.92
    • 1000 $3.51
    • 10000 $3.30
    Buy Now
    SN74BCT541ADW 909 91
    • 1 -
    • 10 -
    • 100 $3.92
    • 1000 $3.51
    • 10000 $3.30
    Buy Now
    SN74BCT541ADW 177 91
    • 1 -
    • 10 -
    • 100 $3.92
    • 1000 $3.51
    • 10000 $3.30
    Buy Now
    SN74BCT541ADW 150 91
    • 1 -
    • 10 -
    • 100 $3.92
    • 1000 $3.51
    • 10000 $3.30
    Buy Now
    SN74BCT541ADW 100 91
    • 1 -
    • 10 -
    • 100 $3.92
    • 1000 $3.51
    • 10000 $3.30
    Buy Now
    Rochester Electronics SN74BCT541ADW 2,574 1
    • 1 -
    • 10 -
    • 100 $3.14
    • 1000 $2.81
    • 10000 $2.64
    Buy Now
    Win Source Electronics SN74BCT541ADW 430
    • 1 -
    • 10 -
    • 100 $2.87
    • 1000 $2.58
    • 10000 $2.58
    Buy Now

    Texas Instruments SN74BCT541ADWR

    Buffer/Line Driver 8-CH Non-Inverting 3-ST 20-Pin SOIC T/R
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Verical SN74BCT541ADWR 686 121
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.77
    • 10000 $2.61
    Buy Now
    Mouser Electronics SN74BCT541ADWR
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $2.91
    Get Quote
    Quest Components SN74BCT541ADWR 33
    • 1 $2.45
    • 10 $2.25
    • 100 $1.96
    • 1000 $1.96
    • 10000 $1.96
    Buy Now
    Rochester Electronics SN74BCT541ADWR 686 1
    • 1 -
    • 10 -
    • 100 $2.48
    • 1000 $2.22
    • 10000 $2.09
    Buy Now
    TME SN74BCT541ADWR 1
    • 1 $2.86
    • 10 $2.62
    • 100 $2.16
    • 1000 $2.01
    • 10000 $2.01
    Get Quote
    Vyrian SN74BCT541ADWR 5,502
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    Texas Instruments SN74BCT541ADB

    Buffer/Line Driver 8-CH Non-Inverting 3-ST 20-Pin SSOP Tube
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Verical SN74BCT541ADB 322 164
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.05
    • 10000 $1.93
    Buy Now
    Rochester Electronics SN74BCT541ADB 322 1
    • 1 -
    • 10 -
    • 100 $1.83
    • 1000 $1.64
    • 10000 $1.54
    Buy Now

    SN74BCT541 Datasheets Context Search

    Catalog Datasheet Type Document Tags PDF

    T541A

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011D - JULY 1988 - REVISED SEPTEMBER 1994 SN54BCT541 . . . J OR W PACKAGE SN74BCT541A . . . DW OR N PACKAGE TOP VIEW State-of-the-Art BiCMOS Design Significantly Reduces Ic c z 3-State Outputs Drive Bus Lines or Buffer


    OCR Scan
    SN54BCT541, SN74BCT541A SCBS011D 300-mil SN54BCT541 SN74BCT541A T541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS S C B S 011 D - JULY 1988 - R EVISED S E P TE M B E R 1994 State-of-the-Art BiCMOS Design Significantly Reduces Iccz SN54BCT541 . . . J OR W PACKAGE SN74BCT541A . . . DW OR N PACKAGE TOP VIEW


    OCR Scan
    SN54BCT541, SN74BCT541A 300-mil SN54BCT541 SN74BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 PDF

    SN54BCT541

    Abstract: SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W
    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN54BCT541 SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011D – JULY 1988 – REVISED SEPTEMBER 1994 • • • • • SN54BCT541 . . . J OR W PACKAGE SN74BCT541A . . . DW OR N PACKAGE TOP VIEW State-of-the-Art BiCMOS Design Significantly Reduces ICCZ


    Original
    SN54BCT541, SN74BCT541A SCBS011D 300-mil SN54BCT541 SN74BCT541A SN54BCT541 SN74BCT541ADW SN74BCT541ADWR PDF

    SN54BCT541

    Abstract: SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W
    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN54BCT541 SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W PDF

    BCT541A

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    SN54BCT541

    Abstract: SN74BCT541A BCT541
    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011D – JULY 1988 – REVISED SEPTEMBER 1994 • • • • • SN54BCT541 . . . J OR W PACKAGE SN74BCT541A . . . DW OR N PACKAGE TOP VIEW State-of-the-Art BiCMOS Design Significantly Reduces ICCZ


    Original
    SN54BCT541, SN74BCT541A SCBS011D SN54BCT541 300-mil SN54BCT541 SN74BCT541A BCT541 PDF

    SN54BCT541

    Abstract: SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W
    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN54BCT541 SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    T541A

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A scyd013 sdyu001x sgyc003d scyb017a T541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    SN54BCT541

    Abstract: SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W
    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN54BCT541 SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN74BCT541A PDF

    SN54BCT541

    Abstract: SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W
    Contextual Info: SN54BCT541, SN74BCT541A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCBS011E – JULY 1988 – REVISED MARCH 2003 D D D Operating Voltage Range of 4.5 V to 5.5 V State-of-the-Art BiCMOS Design Significantly Reduces ICCZ 3-State Outputs Drive Bus Lines or Buffer


    Original
    SN54BCT541, SN74BCT541A SCBS011E SN54BCT541 SN54BCT541 SN74BCT541A SN74BCT541ADW SN74BCT541ADWR SN74BCT541AN SN74BCT541ANSR SNJ54BCT541FK SNJ54BCT541J SNJ54BCT541W PDF