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

    74LCX541 Search Results

    SF Impression Pixel

    74LCX541 Price and Stock

    Rochester Electronics LLC MC74LCX541MELG

    IC BUF NON-INVERT 3.6V SOEIAJ-20
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74LCX541MELG Bulk 39,385 683
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.44
    • 10000 $0.44
    		Buy Now

    Rochester Electronics LLC MC74LCX541DW

    IC BUFFER NON-INVERT 3.6V 20SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74LCX541DW Tube 14,110 1,665
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.18
    		Buy Now

    Rochester Electronics LLC MC74LCX541DTR2

    IC BUF NON-INVERT 3.6V 20TSSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74LCX541DTR2 Bulk 1,906 1,906
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.18
    		Buy Now

    onsemi 74LCX541MTCX

    IC BUF NON-INVERT 3.6V 20TSSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey 74LCX541MTCX Digi-Reel 1,537 1
    • 1 $1.59
    • 10 $0.98
    • 100 $0.6395
    • 1000 $0.45019
    • 10000 $0.45019
    		Buy Now
    74LCX541MTCX Cut Tape 1,537 1
    • 1 $1.59
    • 10 $0.98
    • 100 $0.6395
    • 1000 $0.45019
    • 10000 $0.45019
    		Buy Now
    Avnet Americas 74LCX541MTCX Reel 9 Weeks 5,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.25197
    		Buy Now
    Mouser Electronics 74LCX541MTCX 997
    • 1 $1.35
    • 10 $0.877
    • 100 $0.605
    • 1000 $0.422
    • 10000 $0.352
    		Buy Now
    Verical 74LCX541MTCX 4,780 23
    • 1 -
    • 10 -
    • 100 $0.3394
    • 1000 $0.306
    • 10000 $0.302
    		Buy Now
    74LCX541MTCX 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.9604
    		Buy Now
    74LCX541MTCX 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.2773
    		Buy Now
    Arrow Electronics 74LCX541MTCX Cut Strips 4,780 9 Weeks 1
    • 1 $0.4157
    • 10 $0.3549
    • 100 $0.3394
    • 1000 $0.306
    • 10000 $0.302
    		Buy Now
    74LCX541MTCX 2,500 9 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.2773
    		Buy Now
    Newark 74LCX541MTCX Reel 2,500
    • 1 $0.485
    • 10 $0.485
    • 100 $0.485
    • 1000 $0.485
    • 10000 $0.437
    		Buy Now
    Onlinecomponents.com 74LCX541MTCX
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.3461
    		Buy Now
    TME 74LCX541MTCX 3
    • 1 -
    • 10 $0.264
    • 100 $0.229
    • 1000 $0.194
    • 10000 $0.194
    		Get Quote
    Avnet Silica 74LCX541MTCX 10 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Buy Now
    EBV Elektronik 74LCX541MTCX 11 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Buy Now

    onsemi 74LCX541WMX

    IC BUF NON-INVERT 3.6V 20SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey 74LCX541WMX Digi-Reel 1,099 1
    • 1 $1.86
    • 10 $1.153
    • 100 $0.7591
    • 1000 $0.59332
    • 10000 $0.59332
    		Buy Now
    74LCX541WMX Cut Tape 1,099 1
    • 1 $1.86
    • 10 $1.153
    • 100 $0.7591
    • 1000 $0.59332
    • 10000 $0.59332
    		Buy Now
    74LCX541WMX Reel 1,000 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.54041
    • 10000 $0.4405
    		Buy Now
    Avnet Americas 74LCX541WMX Reel 9 Weeks 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.3038
    		Buy Now
    Mouser Electronics 74LCX541WMX 3,609
    • 1 $1.75
    • 10 $1.12
    • 100 $0.76
    • 1000 $0.473
    • 10000 $0.44
    		Buy Now
    Verical 74LCX541WMX 733 682
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.52
    • 10000 $0.52
    		Buy Now
    74LCX541WMX 696 682
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.52
    • 10000 $0.52
    		Buy Now
    74LCX541WMX 207 14
    • 1 -
    • 10 -
    • 100 $0.4519
    • 1000 $0.4519
    • 10000 $0.4519
    		Buy Now
    Arrow Electronics 74LCX541WMX Cut Strips 207 9 Weeks 1
    • 1 $0.8169
    • 10 $0.6459
    • 100 $0.4519
    • 1000 $0.4519
    • 10000 $0.4519
    		Buy Now
    Newark 74LCX541WMX Reel 1,000
    • 1 $0.607
    • 10 $0.607
    • 100 $0.607
    • 1000 $0.607
    • 10000 $0.529
    		Buy Now
    Onlinecomponents.com 74LCX541WMX
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.4762
    • 10000 $0.4263
    		Buy Now
    Rochester Electronics 74LCX541WMX 1,429 1
    • 1 $0.4894
    • 10 $0.4894
    • 100 $0.46
    • 1000 $0.416
    • 10000 $0.416
    		Buy Now
    TME 74LCX541WMX 881 1
    • 1 $1.09
    • 10 $0.98
    • 100 $0.79
    • 1000 $0.72
    • 10000 $0.72
    		Buy Now
    Avnet Silica 74LCX541WMX 10 Weeks 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Buy Now
    EBV Elektronik 74LCX541WMX 11 Weeks 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Buy Now
    Flip Electronics 74LCX541WMX 24,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    		Get Quote
    New Advantage Corporation 74LCX541WMX 1,000 1
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.7391
    • 10000 $0.7391
    		Buy Now
    Find more 74LCX541 price and stock on Findchips.com

    74LCX541 Datasheets (82)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    74LCX541 Fairchild Semiconductor Low Voltage Octal Buffer-Line Driver with 5V Tolerant Inputs and Outputs Original PDF
    74LCX541 Fairchild Semiconductor Low Voltage Octal Buffer-Line Driver with 5V Tolerant Inputs and Outputs Original PDF
    74LCX541 STMicroelectronics LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS Original PDF
    74LCX541 STMicroelectronics LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS Original PDF
    74LCX541 STMicroelectronics Low Voltage Cmos Octal Bus Buffer (3-state) With 5v Tolerant Inputs and Outputs Original PDF
    74LCX541AM STMicroelectronics Buffer/Line Driver, Non-Inverting, 8 Channel, CMOS, 3-State, 20-SOP Original PDF
    74LCX541AMTR STMicroelectronics Buffer/Line Driver, Non-Inverting, 8 Channel, CMOS, 3-State, 20-SOP Original PDF
    74LCX541AT STMicroelectronics Buffer/Line Driver, Non-Inverting, 8 Channel, CMOS, 3-State, 20-TSSOP Original PDF
    74LCX541ATTR STMicroelectronics Buffer/Line Driver, Non-Inverting, 8 Channel, CMOS, 3-State, 20-TSSOP Original PDF
    74LCX541BQX Fairchild Semiconductor Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Original PDF
    74LCX541BQX Fairchild Semiconductor Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs; Package: DQFN; No of Pins: 20; Container: Tape & Reel Original PDF
    74LCX541BQX2 Fairchild Semiconductor Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Original PDF
    74LCX541CW Fairchild Semiconductor Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Original PDF
    74LCX541FT Toshiba America Electronic Components IC BUFF/DVR 8BIT LOW V 20TSSOP Original PDF
    74LCX541FT(AE) Toshiba Semiconductor and Storage Integrated Circuits (ICs) - Logic - Buffers, Drivers, Receivers, Transceivers - IC BUF NON-INVERT 3.6V 20TSSOP Original PDF
    74LCX541FT(AJ) Toshiba Semiconductor and Storage Integrated Circuits (ICs) - Logic - Buffers, Drivers, Receivers, Transceivers - IC BUFF NON-INVERT 3.6V 20TSSOPB Original PDF
    74LCX541M Fairchild Semiconductor Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Original PDF
    74LCX541M STMicroelectronics Low Voltage CMOS Octal Bus Buffer (3-State) with 5 V Tolerant Inputs and Outputs Original PDF
    74LCX541M STMicroelectronics IC BUFF/LDRVR OCTAL NON-INVERTING 3-ST CMOS 20SOP Original PDF
    74LCX541MSA Fairchild Semiconductor Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Original PDF

    74LCX541 Datasheets Context Search

    Catalog Datasheet Type Document Tags PDF

    74LCX541

    Abstract: 74LCX541BQX 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX244 LCX540 LCX541
    Text: 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Features General Description • 5V tolerant input and outputs The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers


    Original     		74LCX541 LCX541 LCX540. 74LCX541 74LCX541BQX 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX244 LCX540 PDF

    LCX541

    Abstract: LCX244 74LCX541 74LCX541BQX2 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX540
    Text: 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Features General Description • 5V tolerant input and outputs The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers


    Original     		74LCX541 LCX541 LCX540. LCX244 74LCX541 74LCX541BQX2 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX540 PDF

    74LCX541

    Abstract: No abstract text available
    Text: 74LCX541 LOW VOLTAGE CMOS OCTAL BUS BUFFER 3-STATE WITH 5V TOLERANT INPUTS AND OUTPUTS • ■ ■ ■ ■ ■ ■ ■ ■ ■ 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED : tPD = 8.0 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:


    Original     		74LCX541 500mA 74LCX541M 74LCX541MTR 74LCX541TTR 74LCX541 PDF

    74LCX541

    Abstract: 74LCX541AMTR 74LCX541ATTR LCX541 74LCX541AM
    Text: 74LCX541 OCTAL BUS BUFFER 3-STATE NON INV. WITH 5V TOLERANT INPUTS AND OUTPUTS • ■ ■ ■ ■ ■ ■ ■ ■ ■ 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED: tPD = 6.3 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:


    Original     		74LCX541 500mA LCX541 74LCX541 74LCX541AMTR 74LCX541ATTR 74LCX541AM PDF

    LCX541

    Abstract: 74LCX541 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX244 LCX540 M20D
    Text: Revised April 1999 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. The LCX541 is a


    Original     		74LCX541 LCX541 LCX540. LCX244 74LCX541 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX540 M20D PDF

    74LCX541

    Abstract: 74LCX541MTR 74LCX541TTR
    Text: 74LCX541 LOW VOLTAGE CMOS OCTAL BUS BUFFER 3-STATE WITH 5V TOLERANT INPUTS AND OUTPUTS • ■ ■ ■ ■ ■ ■ ■ ■ ■ 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED: tPD = 8.0 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:


    Original     		74LCX541 500mA 74LCX541 74LCX541MTR 74LCX541TTR PDF

    Untitled

    Abstract: No abstract text available
    Text: 74LCX541FT CMOS Digital Integrated Circuits Silicon Monolithic 74LCX541FT 1. Functional Description • Low-Voltage Octal Bus Buffer with 5-V Tolerant Inputs and Outputs 2. General The 74LCX541FT is a high-performance CMOS octal bus buffer. Designed for use in 3.3-V systems, it achieves


    Original     		74LCX541FT 74LCX541FT PDF

    LCX541

    Abstract: 74LCX541 74LCX541SJ 74LCX541SJX 74LCX541WM 74LCX541WMX LCX244 LCX540
    Text: LCX541 National PRELIMINARY Semiconductor 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The 'LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and


    OCR Scan     		74LCX541 LCX541 LCX540. LCX244 74LCX541 74LCX Family-74 TL/F/12404-4 74LCX541SJ 74LCX541SJX 74LCX541WM 74LCX541WMX LCX540 PDF

    Untitled

    Abstract: No abstract text available
    Text: Revised March 1999 S E M [CONDUCTOR TM 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers


    OCR Scan     		74LCX541 LCX541 LCX540. LCX244 74LCX541 PDF

    LCX541

    Abstract: 74LCX541 74LCX541SJ 74LCX541WM LCX244 LCX540 M20D MS-013 MSA20
    Text: ^ a rc h Revised , .Q Q Q April 1999 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features T he LCX541 is an octal buffer/line driver designed to be em ployed as m em ory and address drivers, clock drivers


    OCR Scan     		74LCX541 LCX541 LCX540. LCX244 74LCX541 74LCX541SJ 74LCX541WM LCX540 M20D MS-013 MSA20 PDF

    Untitled

    Abstract: No abstract text available
    Text: 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Features General Description • 5V tolerant input and outputs The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers


    Original     		74LCX541 LCX541 LCX540. 74LCX541 PDF

    LCX541

    Abstract: No abstract text available
    Text: LCX541 National Semiconductor 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The 'LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and


    OCR Scan     		LCX541 74LCX541 LCX541 LCX540. LCX244 74LCX PDF

    74LCX541

    Abstract: LCX541 74LCX541AM 74LCX541AMTR 74LCX541ATTR
    Text: 74LCX541  OCTAL BUS BUFFER 3-STATE NON INV. WITH 5V TOLERANT INPUTS AND OUTPUTS • ■ ■ ■ ■ ■ ■ ■ ■ ■ 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED: tPD = 6.3 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:


    Original     		74LCX541 500mA LCX541 74LCX541 74LCX541AM 74LCX541AMTR 74LCX541ATTR PDF

    LCX541

    Abstract: 74LCX541 74LCX541MSA 74LCX541SJ 74LCX541SJX 74LCX541WM 74LCX541WMX LCX244 LCX540
    Text: October 1995 S e m i c o n d u c t o r 9 74LCX541 Low V o ltage O ctal B u ffe r/L in e Driver w ith 5V T o leran t Inputs and O utputs General Description Features The ’LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and


    OCR Scan     		74LCX541 LCX541 LCX540. LCX244 74LCX541 74LCX541MSA 74LCX541SJ 74LCX541SJX 74LCX541WM 74LCX541WMX LCX540 PDF

    Untitled

    Abstract: No abstract text available
    Text: 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs Features General Description • 5V tolerant input and outputs The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers


    Original     		74LCX541 LCX541 PDF

    LCX541

    Abstract: 74LCX541 74LCX541SJ 74LCX541SJX 74LCX541WM 74LCX541WMX LCX244 LCX540 M20D
    Text: 74LCX541 Low Voltage Octal Buffer Line Driver with 5V Tolerant Inputs and Outputs General Description Features The ’LCX541 is an octal buffer line driver designed to be employed as memory and address drivers clock drivers and bus oriented transmitter receivers The ’LCX541 is a noninverting option of the ’LCX540


    Original     		74LCX541 LCX541 LCX540 LCX244 74LCX541 74LCX541SJ 74LCX541SJX 74LCX541WM 74LCX541WMX LCX540 M20D PDF

    LCX541

    Abstract: 74LCX541 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX244 LCX540 M20D 74LCX5
    Text: Revised March 2001 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. The LCX541 is a


    Original     		74LCX541 LCX541 LCX540. LCX244 74LCX541 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX540 M20D 74LCX5 PDF

    74LCX541

    Abstract: 74LCX541M 74LCX541MTR 74LCX541TTR
    Text: 74LCX541 LOW VOLTAGE CMOS OCTAL BUS BUFFER 3-STATE WITH 5V TOLERANT INPUTS AND OUTPUTS • ■ ■ ■ ■ ■ ■ ■ ■ ■ 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED : tPD = 8.0 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:


    Original     		74LCX541 500mA 74LCX541 74LCX541M 74LCX541MTR 74LCX541TTR PDF

    Untitled

    Abstract: No abstract text available
    Text: 74LCX541FT CMOS Digital Integrated Circuits Silicon Monolithic 74LCX541FT 1. Functional Description • Low-Voltage Octal Bus Buffer with 5-V Tolerant Inputs and Outputs 2. General The 74LCX541FT is a high-performance CMOS octal bus buffer. Designed for use in 3.3-V systems, it achieves


    Original     		74LCX541FT 74LCX541FT PDF

    Untitled

    Abstract: No abstract text available
    Text: S E M IC O N D U C T O R -n 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The LCX541 is an octal buffer/line driver designed to be em­ ployed as memory and address drivers, clock drivers and


    OCR Scan     		74LCX541 LCX541 LCX540. LCX244 LCX541g PDF

    74LCX541

    Abstract: No abstract text available
    Text: 74LCX541 Low voltage CMOS octal bus buffer 3-state with 5V tolerant inputs and outputs Features • 5V tolerant inputs and outputs ■ High speed: – tPD = 8.0ns (Max) at VCC = 3V ■ Power down protection on inputs and outputs ■ Symmetrical output impedance:


    Original     		74LCX541 500mA SO-20 TSSOP20 74LCX541 PDF

    74LCX541

    Abstract: 74LCX541MTR 74LCX541TTR JESD97 74lcx541 st
    Text: 74LCX541 Low voltage CMOS octal bus buffer 3-state with 5V tolerant inputs and outputs Features • 5V tolerant inputs and outputs ■ High speed: – tPD = 8.0ns (Max) at VCC = 3V ■ Power down protection on inputs and outputs ■ Symmetrical output impedance:


    Original     		74LCX541 500mA SO-20 TSSOP20 74LCX541 74LCX541MTR 74LCX541TTR JESD97 74lcx541 st PDF

    Untitled

    Abstract: No abstract text available
    Text: A I R C H I L D S E M I C O N D U C T O R TM 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The LCX541 is an octal buffer/line driver designed to be em­ ployed as memory and address drivers, clock drivers and


    OCR Scan     		74LCX541 LCX541 LCX540. LCX244 PDF

    LCX541

    Abstract: 74LCX541 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX244 LCX540 M20D
    Text: 74LCX541 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features The LCX541 is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. The LCX541 is a noninverting option of the LCX540.


    Original     		74LCX541 LCX541 LCX540. LCX244 74LCX541 74LCX541MSA 74LCX541MTC 74LCX541SJ 74LCX541WM LCX540 M20D PDF