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

    SN74LS15 Search Results

    SN74LS15 Result Highlights (5)

    Part ECAD Model Manufacturer Description Download Buy
    SN74LS151NE4 Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers 16-PDIP 0 to 70 Visit Texas Instruments Buy
    SN74LS155ADR Texas Instruments Dual 2-Line To 4-Line Decoders/Demultiplexers 16-SOIC 0 to 70 Visit Texas Instruments
    SN74LS157D Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-SOIC 0 to 70 Visit Texas Instruments Buy
    SN74LS157NSR Texas Instruments Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-SO 0 to 70 Visit Texas Instruments Buy
    SN74LS151D Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers 16-SOIC 0 to 70 Visit Texas Instruments Buy
    SF Impression Pixel

    SN74LS15 Price and Stock

    Texas Instruments SN74LS153DR

    IC MULTIPLEXER 2 X 4:1 16SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74LS153DR Cut Tape 3,766 1
    • 1 $0.8
    • 10 $0.57
    • 100 $0.4495
    • 1000 $0.38648
    • 10000 $0.38648
    Buy Now
    SN74LS153DR Digi-Reel 3,766 1
    • 1 $0.8
    • 10 $0.57
    • 100 $0.4495
    • 1000 $0.38648
    • 10000 $0.38648
    Buy Now
    Mouser Electronics SN74LS153DR 2,138
    • 1 $0.8
    • 10 $0.512
    • 100 $0.419
    • 1000 $0.386
    • 10000 $0.335
    Buy Now
    Bristol Electronics SN74LS153DR 177
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Rochester Electronics SN74LS153DR 5,000 1
    • 1 $0.3611
    • 10 $0.3611
    • 100 $0.3394
    • 1000 $0.3069
    • 10000 $0.3069
    Buy Now

    Texas Instruments SN74LS156DR

    IC DECODER/DEMUX 2X1:4 16SOIC
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74LS156DR Digi-Reel 2,878 1
    • 1 $0.8
    • 10 $0.57
    • 100 $0.4495
    • 1000 $0.38648
    • 10000 $0.38648
    Buy Now
    SN74LS156DR Cut Tape 2,878 1
    • 1 $0.8
    • 10 $0.57
    • 100 $0.4495
    • 1000 $0.38648
    • 10000 $0.38648
    Buy Now

    Texas Instruments SN74LS158NSR

    IC MULTIPLEXER 4 X 2:1 16SO
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74LS158NSR Reel 2,000 2,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.19831
    Buy Now
    SN74LS158NSR Digi-Reel 2,000 1
    • 1 $0.48
    • 10 $0.333
    • 100 $0.2582
    • 1000 $0.21891
    • 10000 $0.21891
    Buy Now
    SN74LS158NSR Cut Tape 2,000 1
    • 1 $0.48
    • 10 $0.333
    • 100 $0.2582
    • 1000 $0.21891
    • 10000 $0.21891
    Buy Now
    Rochester Electronics SN74LS158NSR 2,000 1
    • 1 $0.2
    • 10 $0.2
    • 100 $0.188
    • 1000 $0.17
    • 10000 $0.17
    Buy Now

    Texas Instruments SN74LS157NSR

    IC MULTIPLEXER 4 X 2:1 16SO
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74LS157NSR Digi-Reel 1,975 1
    • 1 $0.78
    • 10 $0.556
    • 100 $0.4381
    • 1000 $0.37644
    • 10000 $0.37644
    Buy Now
    SN74LS157NSR Cut Tape 1,975 1
    • 1 $0.78
    • 10 $0.556
    • 100 $0.4381
    • 1000 $0.37644
    • 10000 $0.37644
    Buy Now

    Texas Instruments SN74LS158N

    IC MULTIPLEXER 4 X 2:1 16DIP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74LS158N Tube 1,100 1
    • 1 $0.83
    • 10 $0.59
    • 100 $0.4658
    • 1000 $0.4008
    • 10000 $0.37481
    Buy Now
    Mouser Electronics SN74LS158N 922
    • 1 $0.83
    • 10 $0.531
    • 100 $0.434
    • 1000 $0.4
    • 10000 $0.374
    Buy Now
    Newark SN74LS158N Bulk 1
    • 1 $1.13
    • 10 $1.04
    • 100 $0.947
    • 1000 $0.854
    • 10000 $0.791
    Buy Now
    Bristol Electronics SN74LS158N 695
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    SN74LS158N 247
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Rochester Electronics SN74LS158N 6,610 1
    • 1 $0.375
    • 10 $0.375
    • 100 $0.3525
    • 1000 $0.3187
    • 10000 $0.3187
    Buy Now
    ComSIT USA SN74LS158N 10,091
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    SN74LS15 Datasheets (460)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    SN74LS15 Motorola Triple 3-Input AND Gate Original PDF
    SN74LS15 Texas Instruments TRIPLE 3-INPUT POSITIVE-AND GATES WITH OPEN-COLLECTOR OUTPUTS Original PDF
    SN74LS151 Motorola 8-INPUT MULTIPLEXER Original PDF
    SN74LS151 On Semiconductor 8-Input Multiplexer Original PDF
    SN74LS151 Texas Instruments DATA SELECTORS-MULTIPLEXERS Original PDF
    SN74LS151D Motorola 8-INPUT MULTIPLEXER Original PDF
    SN74LS151D On Semiconductor LOW POWER SCHOTTKY Original PDF
    SN74LS151-D On Semiconductor 8-Input Multiplexer Original PDF
    SN74LS151D Texas Instruments SN74LS151 - 8-Line To 1-Line Data Selectors/Multiplexers 16-SOIC 0 to 70 Original PDF
    SN74LS151D Texas Instruments Logic - Signal Switches, Multiplexers, Decoders, Integrated Circuits (ICs), IC DATA SELECTOR/MUX SGL 16SOIC Original PDF
    SN74LS151D Texas Instruments Data Selector/Multiplexer Original PDF
    SN74LS151D Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers 16-SOIC 0 to 70 Original PDF
    SN74LS151D Unknown Historical semiconductor price guide (US$ - 1998). From our catalog scanning project. Historical PDF
    SN74LS151D Unknown Historical semiconductor price guide (US$ - 1998). From our catalog scanning project. Historical PDF
    SN74LS151DE4 Texas Instruments SN74LS151 - 8-Line To 1-Line Data Selectors/Multiplexers 16-SOIC 0 to 70 Original PDF
    SN74LS151DE4 Texas Instruments Logic - Signal Switches, Multiplexers, Decoders, Integrated Circuits (ICs), IC DATA SELECT/MUX 8-1 16-SOIC Original PDF
    SN74LS151DE4 Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers 16-SOIC 0 to 70 Original PDF
    SN74LS151DE4 Texas Instruments DATA SELECTORS/MULTIPLEXERS Original PDF
    SN74LS151DG4 Texas Instruments SN74LS151 - 8-Line To 1-Line Data Selectors/Multiplexers 16-SOIC 0 to 70 Original PDF
    SN74LS151DG4 Texas Instruments Logic - Signal Switches, Multiplexers, Decoders, Integrated Circuits (ICs), IC DATA SELECTOR/MUX SGL 16SOIC Original PDF
    ...

    SN74LS15 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    Untitled

    Abstract: No abstract text available
    Text: PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2005 Orderable Device Status 1 Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LS151DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS151DRE4 ACTIVE SOIC D 16 2500 Green (RoHS &


    Original
    PDF 26-Sep-2005 SN74LS151DR SN74LS151DRE4 SN74LS151J SN74LS151N SN74LS151N3

    Untitled

    Abstract: No abstract text available
    Text: PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2005 Orderable Device Status 1 Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LS151DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS151DRE4 ACTIVE SOIC D 16 2500 Green (RoHS &


    Original
    PDF 26-Sep-2005 SN74LS151DR SN74LS151DRE4 SN74LS151J SN74LS151N SN74LS151N3

    Untitled

    Abstract: No abstract text available
    Text: PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2005 Orderable Device Status 1 Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LS151DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS151DRE4 ACTIVE SOIC D 16 2500 Green (RoHS &


    Original
    PDF 26-Sep-2005 SN74LS151DR Level-1-260C-UNLIM SN74LS151DRE4 SN74LS151J SN74LS151N

    DECODER

    Abstract: SN54155 SN54156 SN54LS155A SN54LS156 SN74155 SN74156 SN74LS155A SN74LS156
    Text: SN54155, SN54156, SN54LS155A, SN54LS156, SN74155, SN74156, SN74LS155A, SN74LS156 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDLS057 – MARCH 1974 – REVISED MARCH 1988 Copyright  1988, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date.


    Original
    PDF SN54155, SN54156, SN54LS155A, SN54LS156, SN74155, SN74156, SN74LS155A, SN74LS156 SDLS057 DECODER SN54155 SN54156 SN54LS155A SN54LS156 SN74155 SN74156 SN74LS155A SN74LS156

    Untitled

    Abstract: No abstract text available
    Text: SN54155, SN54156, SN54LS155A, SN54LS156, SN74155, SN74156, SN74LS155A, SN74LS156 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDLS057 – MARCH 1974 – REVISED MARCH 1988 Copyright  1988, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date.


    Original
    PDF SN54155, SN54156, SN54LS155A, SN54LS156, SN74155, SN74156, SN74LS155A, SN74LS156 SDLS057

    LS157

    Abstract: SN74LS157 SN74LS157D SN74LS157DR2 SN74LS157M SN74LS157MEL SN74LS157N sn74ls157n pin out sn74ls15
    Text: SN74LS157 Quad 2-Input Multiplexer The LSTTL/MSI SN74LS157 is a high speed Quad 2-Input Multiplexer. Four bits of data from two sources can be selected using the common Select and Enable inputs. The four buffered outputs present the selected data in the true non-inverted form. The LS157


    Original
    PDF SN74LS157 SN74LS157 LS157 LS157 r14525 SN74LS157/D SN74LS157D SN74LS157DR2 SN74LS157M SN74LS157MEL SN74LS157N sn74ls157n pin out sn74ls15

    i7 800

    Abstract: LS151 SN74LS151 SN74LS151D SN74LS151N
    Text: SN74LS151 8-Input Multiplexer The TTL / MSI SN74LS151 is a high speed 8-input Digital Multiplexer. It provides, in one package, the ability to select one bit of data from up to eight sources. The LS151 can be used as a universal function generator to generate any logic function of four variables.


    Original
    PDF SN74LS151 SN74LS151 LS151 r14153 SN74LS151/D i7 800 SN74LS151D SN74LS151N

    SN74LS156

    Abstract: truth table for 4 to 16 decoder LS155 LS156 SN74LS156D SN74LS156N truth table for 1 to 16 decoder
    Text: SN74LS156 Dual 1-of-4 Decoder/ Demultiplexer The SN74LS156 is a high speed Dual 1-of-4 Decoder/ Demultiplexer. This device has two decoders with common 2-bit Address inputs and separate gated Enable inputs. Decoder “a” has an Enable gate with one active HIGH and one active LOW input.


    Original
    PDF SN74LS156 SN74LS156 LS156 truth table for 4 to 16 decoder LS155 SN74LS156D SN74LS156N truth table for 1 to 16 decoder

    SN74LS151N

    Abstract: SN74LS151N3 sn74151 SN74151AN SN74LS151DRE4 SN74LS151J SN74LS151NE4 SN74LS151NSR SN74LS151NSRE4 SN74S151D
    Text: PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2005 Orderable Device Status 1 Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LS151DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS151DRE4 ACTIVE SOIC D 16 2500 Green (RoHS &


    Original
    PDF 26-Sep-2005 SN74LS151DR Level-1-260C-UNLIM SN74LS151DRE4 SN74LS151J SN74LS151N SN74LS151N SN74LS151N3 sn74151 SN74151AN SN74LS151DRE4 SN74LS151J SN74LS151NE4 SN74LS151NSR SN74LS151NSRE4 SN74S151D

    SN54155

    Abstract: SN54156 SN54LS155A SN54LS156 SN74155 SN74156 SN74LS155A SN74LS156
    Text: SN54155, SN54156, SN54LS155A, SN54LS156, SN74155, SN74156, SN74LS155A, SN74LS156 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDLS057 – MARCH 1974 – REVISED MARCH 1988 Copyright  1988, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date.


    Original
    PDF SN54155, SN54156, SN54LS155A, SN54LS156, SN74155, SN74156, SN74LS155A, SN74LS156 SDLS057 SN54155 SN54156 SN54LS155A SN54LS156 SN74155 SN74156 SN74LS155A SN74LS156

    Untitled

    Abstract: No abstract text available
    Text: PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2005 Orderable Device Status 1 Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LS151DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS151DRE4 ACTIVE SOIC D 16 2500 Green (RoHS &


    Original
    PDF 26-Sep-2005 SN74LS151DR SN74LS151DRE4 SN74LS151J SN74LS151N SN74LS151N3

    sn74151

    Abstract: SN54LS151
    Text: PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2005 Orderable Device Status 1 Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LS151DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS151DRE4 ACTIVE SOIC D 16 2500 Green (RoHS &


    Original
    PDF 26-Sep-2005 SN74LS151DR SN74LS151DRE4 SN74LS151J SN74LS151N SN74LS151N3 sn74151 SN54LS151

    16 pin SN74LS157N

    Abstract: No abstract text available
    Text: SN54157, SN54LS157SN54LS158, SN54S157, SN54S158, SN74157, SN74LS157, SN74lS158, SN74S157, SN74S158 SDLS058 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORSIMUlTIPLEXERS MARCH 1974- R VISE:J MARCH 1988 • Buffered Inputs and Outputs • Three Speed/Power Ranges Available


    Original
    PDF SN54157, SN54LS157SN54LS158, SN54S157, SN54S158, SN74157, SN74LS157, SN74lS158, SN74S157, SN74S158 SDLS058 16 pin SN74LS157N

    Untitled

    Abstract: No abstract text available
    Text: PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2005 Orderable Device Status 1 Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74LS151DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS151DRE4 ACTIVE SOIC D 16 2500 Green (RoHS &


    Original
    PDF 26-Sep-2005 SN74LS151DR SN74LS151DRE4 SN74LS151J SN74LS151N SN74LS151N3

    54151A

    Abstract: No abstract text available
    Text: TYPES SN54150, SN54151A. SN54152A, SN54LS151, SN54LS152, SN54S151, SN74150, SN741S1A, SN74LS151, SN74S151 DATA SELECTORS/MULTIPLEXERS D E C E M B E R 1 9 7 2 - R E V IS E D D E C E M B E R 1983 SN 5 41 5 0 . . J OR W PACKAG E S N 7 4 1 5 0 . . J OR N PACKAGE


    OCR Scan
    PDF SN54150, SN54151A. SN54152A, SN54LS151, SN54LS152, SN54S151, SN74150, SN741S1A, SN74LS151, SN74S151 54151A

    Untitled

    Abstract: No abstract text available
    Text: SN54LS15, SN54S15, SN74LS15, SN74S15 TRIPLE 3 INPUT POSITIVE AND GATES WITH OPEN-COLLECTOR OUTPUTS A P R IL 1 9 8 5 — R E V IS E D M A R C H Package Options Include Plastic "Sm all Outline" Packages, Ceramic Chip Carriers and Flat Packages, and Plastic and Ceramic


    OCR Scan
    PDF SN54LS15, SN54S15, SN74LS15, SN74S15

    NV11

    Abstract: multiplexers 74 LS 151
    Text: SN54157, SN54LS157, SN54LS158. SN54S157, SN54S158, SN74157, SN74LS157, SN74LS158, SN74S157. SN74S15B QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS M AR C H 1974- - Buffered Inputs and O utputs S N 5 41 57 , S N 54LS 157, S N 54S 157. S N 5 4 L S 1 5 8 , S N 5 4 S 1 5 8 . . . J OR W PACKAGE


    OCR Scan
    PDF SN54157, SN54LS157, SN54LS158. SN54S157, SN54S158, SN74157, SN74LS157, SN74LS158, SN74S157. SN74S15B NV11 multiplexers 74 LS 151

    74H15

    Abstract: No abstract text available
    Text: TYPES SN54H15, SN54LS15, SN54S15, SN74H15, SN74LS15, SN74S15 TRIPLE 3-INPUT POSITIVE-AND GATES WITH OPEN-COLLECTOR OUTPUTS REVISED APRIL 1985 Package Options Include Both Plastic and Ceramic Chip Carriers in Addition to Plastic and Ceramic DIPs S N 5 4 H 1 5 . S N B 4 L S 1 5 , S N 5 4 S 1 5 . . . J OR W PACKAGE


    OCR Scan
    PDF SN54H15, SN54LS15, SN54S15, SN74H15, SN74LS15, SN74S15 74H15

    Sn74ls157

    Abstract: No abstract text available
    Text: TYPES SN54157, SN54L157, SN54LS157, SN54LS158, SN54S157, SN54S158, SN74157, SN74LS157, SN74LS158, SN74S157, SN74S158 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS MARCH Buffered Inputs and Outputs S N 7 4 L S 1 5 8 , S N 7 4 S 1 5 8 . . . D , J OR N PACKAGE


    OCR Scan
    PDF SN54157, SN54L157, SN54LS157, SN54LS158, SN54S157, SN54S158, SN74157, SN74LS157, SN74LS158, SN74S157, Sn74ls157

    54L157

    Abstract: ic 74157 3B89 74ls158
    Text: TYPES SN54157, SN54L157, SN54LS157, SN54LS158, SN54S157, SN54S158, SN74157, SN74LS157, SN74LS158, SN74S157, SN74S158 QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS M A R C H 1 9 7 4 —R E V I S E D D E C E M B E R 1983 SN 54157, SN 54LS157, SN 54S157.


    OCR Scan
    PDF SN54157, SN54L157, SN54LS157, SN54LS158, SN54S157, SN54S158, SN74157, SN74LS157, SN74LS158, SN74S157, 54L157 ic 74157 3B89 74ls158

    multiplexers 74 LS 150

    Abstract: No abstract text available
    Text: TYPES SN74150, SN74151A, SN74LS151, SN74S151 SN54150, SN54151A, SN54LS151, SN54S151 DATA SELECTORS/MULTIPLEXERS DECEM BER 1972 - REV ISED DECEM BER 1983 SN54150. J PA CKAG E SN74150.DW OR N PA CKAG E TOP VIEW > '150 Selects One-of-Sixteen Data Sources


    OCR Scan
    PDF SN74150, SN74151A, SN74LS151, SN74S151 SN54150, SN54151A, SN54LS151, SN54S151 300-mil SN54150. multiplexers 74 LS 150

    sn74ls153

    Abstract: No abstract text available
    Text: TYPES SN74LS153, SN74S153 DUAL 4-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS DECEMBER 1972 - REVISED DECEMBER 1983 Permits Multiplexing from N lines to 1 line Performs Parallel-to-Serial Conversion Strobe Enable Line Provided for Cascading (N lines to n lines)


    OCR Scan
    PDF SN74LS153, SN74S153 300-m SN54LS153, SN54S153. SN74S153. sn74ls153

    Untitled

    Abstract: No abstract text available
    Text: g MOTOROLA SN54LS15 SN74LS15 R R R R R R R TRIPLE 3-INPUT AND GATE t l Hl LU LU Lü LU L I LOW POWER SCHOTTKY •OPEN COLLECTOR OUTPUTS J Suffix — Case 632-07 (Ceramic) N Suffix — Case 646-05 /Plastic) GUARANTEED OPERATING RANGES SYM BOL PARAM ETER MIN


    OCR Scan
    PDF SN54LS15 SN74LS15

    K 3569 7.v equivalent

    Abstract: 74153 mux 74153, LS153, S153 Multiplexers Dual 4-Line 1-Line 74153 multiplex mux 74153 TTL 74153 pin diagram of 74153 SN74LS153 multiplexor 74153 SN54L153
    Text: TYPES SN54153, SN54L153, SN54LS153, SN54S153, SN74153, SN74LS153, SN74S153 DUAL 4-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS DECEMBER Permits M u ltip lexin g fro m N lines to 1 line 1 9 7 2 — R E V IS E D D E C E M B E R 1983 S N 5 4 1 5 3 . S N 5 4 L S 1 5 3 , S N 5 4 S 1 5 3 . . . J OR W PACKAGE


    OCR Scan
    PDF SN54153, SN54L153, SN54LS153, SN54S153, SN74153, SN74LS153, SN74S153 1972-R K 3569 7.v equivalent 74153 mux 74153, LS153, S153 Multiplexers Dual 4-Line 1-Line 74153 multiplex mux 74153 TTL 74153 pin diagram of 74153 SN74LS153 multiplexor 74153 SN54L153