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SN74AHCT138DGV 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74AHCT138DGV 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 9 page SN54AHCT138, SN74AHCT138 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS SCLS266J – DECEMBER 1995 – REVISED JANUARY 2000 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D EPIC™ (Enhanced-Performance Implanted CMOS) Process D Inputs Are TTL-Voltage Compatible D Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems D Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception D Latch-Up Performance Exceeds 250 mA Per JESD 17 D ESD Protection Exceeds 2000 V Per MIL-STD-833, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) D Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), Thin Very Small-Outline (DGV), Thin Shrink Small-Outline (PW), and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs description The ’AHCT138 3-line to 8-line decoders/ demultiplexers are designed to be used in high-performance memory-decoding and data-routing applications that require very short propagation-delay times. In high-performance memory systems, this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of this decoder and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible. The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications. The SN54AHCT138 is characterized for operation over the full military temperature range of –55 °C to 125°C. The SN74AHCT138 is characterized for operation from –40 °C to 85°C. Copyright © 2000, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. EPIC is a trademark of Texas Instruments Incorporated. 32 1 20 19 910 11 1213 4 5 6 7 8 18 17 16 15 14 Y1 Y2 NC Y3 Y4 C G2A NC G2B G1 SN54AHCT138 . . . FK PACKAGE (TOP VIEW) NC – No internal connection 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 A B C G2A G2B G1 Y7 GND VCC Y0 Y1 Y2 Y3 Y4 Y5 Y6 SN54AHCT138 ...J OR W PACKAGE SN74AHCT138 . . . D, DB, DGV, N, OR PW PACKAGE (TOP VIEW) On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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