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

    157DT Search Results

    157DT Result Highlights (3)

    Part ECAD Model Manufacturer Description Download Buy
    74FCT157DTQG8 Renesas Electronics Corporation Quad 2-Input Multiplexer Visit Renesas Electronics Corporation
    74FCT157DTQG Renesas Electronics Corporation Quad 2-Input Multiplexer Visit Renesas Electronics Corporation
    SN74LVC1G3157DTBR Texas Instruments 1-channel, 2:1 analog switch 6-X2SON -40 to 125 Visit Texas Instruments Buy
    SF Impression Pixel

    157DT Price and Stock

    Texas Instruments SN74LVC1G3157DTBR

    IC SWITCH SPDT X 1 15OHM 6X2SON
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SN74LVC1G3157DTBR Digi-Reel 14,056 1
    • 1 $0.15
    • 10 $0.102
    • 100 $0.0756
    • 1000 $0.06193
    • 10000 $0.06193
    Buy Now
    SN74LVC1G3157DTBR Reel 9,000 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.05793
    Buy Now
    Mouser Electronics SN74LVC1G3157DTBR 7,018
    • 1 $0.15
    • 10 $0.09
    • 100 $0.066
    • 1000 $0.062
    • 10000 $0.053
    Buy Now
    Bristol Electronics SN74LVC1G3157DTBR 3,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    TME SN74LVC1G3157DTBR 3
    • 1 -
    • 10 $0.238
    • 100 $0.131
    • 1000 $0.095
    • 10000 $0.095
    Get Quote

    onsemi MC74LCX157DTR2G

    IC MULTIPLEXER 4 X 2:1 16TSSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74LCX157DTR2G Reel 2,500 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.26971
    Buy Now
    Avnet Americas MC74LCX157DTR2G Reel 12 Weeks 5,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.14958
    Buy Now
    Mouser Electronics MC74LCX157DTR2G 1,086
    • 1 $0.66
    • 10 $0.581
    • 100 $0.414
    • 1000 $0.255
    • 10000 $0.218
    Buy Now
    Newark MC74LCX157DTR2G Reel 2,500
    • 1 $0.301
    • 10 $0.301
    • 100 $0.301
    • 1000 $0.301
    • 10000 $0.271
    Buy Now
    Bristol Electronics MC74LCX157DTR2G 7,307
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Rochester Electronics MC74LCX157DTR2G 333,867 1
    • 1 $0.2424
    • 10 $0.2424
    • 100 $0.2279
    • 1000 $0.206
    • 10000 $0.206
    Buy Now
    TME MC74LCX157DTR2G 1
    • 1 $0.598
    • 10 $0.229
    • 100 $0.181
    • 1000 $0.136
    • 10000 $0.129
    Get Quote
    Avnet Silica MC74LCX157DTR2G 13 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    EBV Elektronik MC74LCX157DTR2G 14 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now

    onsemi MC74LVX157DTR2G

    IC MULTIPLEXER 4 X 2:1 16TSSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74LVX157DTR2G Digi-Reel 2,497 1
    • 1 $1.15
    • 10 $0.702
    • 100 $0.4497
    • 1000 $0.30943
    • 10000 $0.30943
    Buy Now
    MC74LVX157DTR2G Cut Tape 2,497 1
    • 1 $1.15
    • 10 $0.702
    • 100 $0.4497
    • 1000 $0.30943
    • 10000 $0.30943
    Buy Now
    Avnet Americas MC74LVX157DTR2G Reel 12 Weeks 5,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.20159
    Buy Now
    Mouser Electronics MC74LVX157DTR2G 2,061
    • 1 $0.63
    • 10 $0.577
    • 100 $0.379
    • 1000 $0.306
    • 10000 $0.221
    Buy Now
    Newark MC74LVX157DTR2G Reel 2,500
    • 1 $0.305
    • 10 $0.305
    • 100 $0.305
    • 1000 $0.305
    • 10000 $0.275
    Buy Now
    Rochester Electronics MC74LVX157DTR2G 27,500 1
    • 1 $0.2458
    • 10 $0.2458
    • 100 $0.2311
    • 1000 $0.2089
    • 10000 $0.2089
    Buy Now
    Avnet Silica MC74LVX157DTR2G 13 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    EBV Elektronik MC74LVX157DTR2G 14 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now

    onsemi MC74AC157DTR2G

    IC MULTIPLEXER 4 X 2:1 16TSSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74AC157DTR2G Cut Tape 2,352 1
    • 1 $1.14
    • 10 $0.693
    • 100 $0.4438
    • 1000 $0.3051
    • 10000 $0.3051
    Buy Now
    Avnet Americas MC74AC157DTR2G Reel 12 Weeks 5,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.19812
    Buy Now
    Mouser Electronics MC74AC157DTR2G 8,284
    • 1 $0.38
    • 10 $0.376
    • 100 $0.333
    • 1000 $0.268
    • 10000 $0.217
    Buy Now
    Newark MC74AC157DTR2G Reel 2,500
    • 1 $0.3
    • 10 $0.3
    • 100 $0.3
    • 1000 $0.3
    • 10000 $0.261
    Buy Now
    Bristol Electronics MC74AC157DTR2G 902
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Rochester Electronics MC74AC157DTR2G 76,045 1
    • 1 $0.2415
    • 10 $0.2415
    • 100 $0.227
    • 1000 $0.2053
    • 10000 $0.2053
    Buy Now
    Avnet Silica MC74AC157DTR2G 13 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    EBV Elektronik MC74AC157DTR2G 14 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now

    onsemi MC74VHC157DTR2G

    IC MULTIPLEXER 4 X 2:1 16TSSOP
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey MC74VHC157DTR2G Cut Tape 1,694 1
    • 1 $1.19
    • 10 $0.721
    • 100 $0.4628
    • 1000 $0.31904
    • 10000 $0.31904
    Buy Now
    Avnet Americas MC74VHC157DTR2G Reel 12 Weeks 5,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.16945
    Buy Now
    Mouser Electronics MC74VHC157DTR2G 4,005
    • 1 $0.4
    • 10 $0.396
    • 100 $0.353
    • 1000 $0.27
    • 10000 $0.229
    Buy Now
    Newark MC74VHC157DTR2G Reel 2,500
    • 1 $0.317
    • 10 $0.317
    • 100 $0.317
    • 1000 $0.317
    • 10000 $0.285
    Buy Now
    ComSIT USA MC74VHC157DTR2G 1,899
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote
    Avnet Asia MC74VHC157DTR2G 12 Weeks 5,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 $0.15156
    Buy Now
    Avnet Silica MC74VHC157DTR2G 13 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    EBV Elektronik MC74VHC157DTR2G 14 Weeks 2,500
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Buy Now
    Flip Electronics MC74VHC157DTR2G 28,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 -
    • 10000 -
    Get Quote

    157DT Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    IDT74FCT151AT

    Abstract: IDT74FCT151CT
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157AT/CT/DT FEATURES: DESCRIPTION: • • • • The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT IDT74FCT151AT IDT74FCT151CT PDF

    Untitled

    Abstract: No abstract text available
    Text: PI74FCT157T/257T 25Ω Ω Series PI74FCT2157T/2257T QUAD 2-INPUT MULTIPLEXER PI74FCT157T/257T Ω Series)PI74FCT2157T/2257T


    Original
    PI74FCT157T/257T PI74FCT2157T/2257T PI74FCT157/257/2157/2257T 257T/2257T 257AT/2257AT 257CT/2257CT PS2010A PDF

    IDT74FCT151AT

    Abstract: IDT74FCT151CT
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157AT/CT/DT FEATURES: DESCRIPTION: • • • • The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT IDT74FCT151AT IDT74FCT151CT PDF

    quad-2-input NOT gate

    Abstract: E16-1 2537 74FCT157t 74FCT257CT 2L202 74FCT257T
    Text: IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER Integrated Device Technology, Inc. FEATURES: DESCRIPTION: • • • • The IDT54/74FCT157T/AT/CT/DT and IDT54/74FCT257T/ AT/CT/DT are high-speed quad 2-input multiplexers built


    Original
    IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/ FCT157T IDT54/74FCT157T/AT/CT/DT, MIL-STD-883, 157AT quad-2-input NOT gate E16-1 2537 74FCT157t 74FCT257CT 2L202 74FCT257T PDF

    circuit diagram of 16-1 multiplexer

    Abstract: No abstract text available
    Text: IDT74FCT157T/AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER EXTENDED COMMERCIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157T/AT/CT/DT FEATURES: DESCRIPTION: − − − − The FCT157T is a high-speed quad 2-input multiplexer built using an


    Original
    IDT74FCT157T/AT/CT/DT FCT157T P16-1) D16-1) SO16-1) SO16-8) SO16-7) 157AT 157CT circuit diagram of 16-1 multiplexer PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT74FCT157T/AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157T/AT/CT/DT FEATURES: DESCRIPTION: − − − The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157T/AT/CT/DT FCT157T -15mA SO16-1) SO16-8) SO16-7) 157AT 157CT 157DT PDF

    circuit diagram of 16-1 multiplexer

    Abstract: IDT74FCT151AT IDT74FCT151CT
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157AT/CT/DT FEATURES: DESCRIPTION: • • • • The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT circuit diagram of 16-1 multiplexer IDT74FCT151AT IDT74FCT151CT PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER DESCRIPTION: FEATURES: • • • • • • • • IDT74FCT157AT/CT/DT The FCT157T is a high-speed quad 2-input multiplexer built using an


    Original
    IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT PDF

    Untitled

    Abstract: No abstract text available
    Text: PI74FCT157T/257T 25Ω Ω Series PI74FCT2157T/2257T QUAD 2-INPUT MULTIPLEXER PI74FCT157T/257T Ω Series)PI74FCT2157T/2257T


    Original
    PI74FCT157T/257T PI74FCT2157T/2257T PI74FCT157/257/2157/2257T 257T/2257T 257AT/2257AT 257CT/2257CT PS2010A PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157AT/CT/DT FEATURES: DESCRIPTION: • • • • The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157AT/CT/DT -15mA IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT PDF

    Untitled

    Abstract: No abstract text available
    Text: PI74FCT157T/257T 25Ω Ω Series PI74FCT2157T/2257T Quad 2-Input Multiplexer PI74FCT157T/257T Ω Series)PI74FCT2157T/2257T


    Original
    PI74FCT157T/257T PI74FCT2157T/2257T PI74FCT157/257/2157/2257T PI74FCT245ATQ PI74FCT 245TQ 0010BSC 14-pin PDF

    2L202

    Abstract: No abstract text available
    Text: IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT FAST CMOS QUAD 2-INPUT MULTIPLEXER Integrated Device Technology, Inc. FEATURES: DESCRIPTION: • Common features: – Low input and output leakage ≤1µA max. – CMOS power levels


    Original
    IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT MIL-STD-883, FCT157T/257T: -15mA IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT 2257T/AT/CT 2L202 PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT74FCT157T/AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157T/AT/CT/DT FEATURES: DESCRIPTION: − − − The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157T/AT/CT/DT FCT157T -15mA SO16-1) SO16-7) 157AT 157CT 157DT PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157AT/CT/DT FEATURES: DESCRIPTION: • • • • The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT PDF

    IDT74FCT151AT

    Abstract: IDT74FCT151CT
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157AT/CT/DT FEATURES: DESCRIPTION: • • • • The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT IDT74FCT151AT IDT74FCT151CT PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT74FCT157AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER INDUSTRIAL TEMPERATURE RANGE FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT74FCT157AT/CT/DT FEATURES: DESCRIPTION: • • • • The FCT157T is a high-speed quad 2-input multiplexer built using an advanced dual metal CMOS technology. Four bits of data from two sources


    Original
    IDT74FCT157AT/CT/DT -15mA IDT74FCT157AT/CT/DT FCT157T 157AT 157CT 157DT PDF

    Untitled

    Abstract: No abstract text available
    Text: f jj PER ICOM PI74FCT157T/257T 25Q Series PI74FCT2157T/2257T li i il 1111 il i il 1111111 il 1111111111111 Fast CMOS Quad 2-Input Multiplexer Product Features: Product Description:


    OCR Scan
    PI74FCT157/257/2157/2257T 16-pin PI74FCT157T/257T PI74FCT2157T/2257T Time13' 257T/2257T 257AT/2257AT 2S7CT/2257CT PDF

    Untitled

    Abstract: No abstract text available
    Text: ¥ LM ▼ J^ r !n n M W W f W" PI74FCT157T/257T 25Q Series PI74FCT2157T/2257T Fast CMOS Quad 2-Input Multiplexer Product Features: • • Product Description: P I7 4 F C T 157/257/2157/2257T is pin com patible with bipolar FAST Series at a higher speed and low er pow er


    OCR Scan
    PI74FCT157T/257T PI74FCT2157T/2257T 157/257/2157/2257T 16-pin PI74FC /2257A /2257C PS2010A PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER Integrated Device Technology, Inc. FEATURES: DESCRIPTION: • • • • The IDT54/74FCT157T/AT/CT/DT and IDT54/74FCT257T/ AT/CT/DT are high-speed quad 2-input multiplexers built


    OCR Scan
    IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/ FCT157T IDT54/74FCT157T/AT7CT/DT, 157AT 257AT PDF

    Untitled

    Abstract: No abstract text available
    Text: FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT Integrated Device Technology, Inc. FEATURES: DESCRIPTION: • Common features: T h e FC T 157T, F C T 2 5 7 T /F C T 2 2 5 7 T are high-speed quad 2-input multiplexers built using an advanced dual metal C M O S


    OCR Scan
    IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT 2315b IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT 2257T/AT/CT MIL-STD-883, 157AT 257AT PDF

    Untitled

    Abstract: No abstract text available
    Text: fl} PERICOM PI74FCT157T/257T 250 . Series PI74FCT2157T/2257T I ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill II ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill ill I Pro d u ct Featu res:


    OCR Scan
    PI74FCT2157T/2257T PI74FCT157T/257T PI74FCT157/257/2157/2257T 16-pin 257T/2257T 257AT/2257AT 257CT/2257CT PS2010A PDF

    Untitled

    Abstract: No abstract text available
    Text: FAST CMOS QUAD 2-INPUT MULTIPLEXER IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT Integrated Device Technology, inc. FEATURES: DESCRIPTION: • Common features: - Low input and output leakage <1p.A max. - CMOS power levels - True TTL input and output compatibility


    OCR Scan
    IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT MIL-STD-883, FCT157T/257T: -15mA FCT2257T: IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/0T 2257T/AT/CT PDF

    74FCT257T

    Abstract: No abstract text available
    Text: IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT FAST CMOS QUAD 2-INPUT MULTIPLEXER In te g rate d D evice Technology, Inc. FEATURES: DESCRIPTION: • • • • The IDT54/74FCT157T/AT/CT/DT and IDT54/74FCT257T/ AT/CT/DT are high-speed quad 2-input m ultiplexers built


    OCR Scan
    IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT -15mA IL-STD-883, IDT54/74FCT257T/ IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT 257AT 157CT 74FCT257T PDF

    Untitled

    Abstract: No abstract text available
    Text: IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT FAST CMOS Q U A D 2-INPUT MULT IPLE XE R FEATURES: DESCRIPTION: • C o m m o n features: The FCT157T, FC T257T/FC T2257T are high-speed quad 2-input m ultiplexers built using an advanced dual metal CMOS


    OCR Scan
    IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT FCT157T, T257T/FC T2257T T157T 157AT 257AT PDF