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SN74AHC139DGVR Scheda tecnica(PDF) 1 Page - Texas Instruments |
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SN74AHC139DGVR Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 22 page 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 2A 2B NC 2Y0 2Y1 1B 1Y0 NC 1Y1 1Y2 SN54AHC139 . . . FKP ACKAGE (TOP VIEW) NC − No internal connection 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 1G 1A 1B 1Y0 1Y1 1Y2 1Y3 GND VCC 2G 2A 2B 2Y0 2Y1 2Y2 2Y3 SN74AHC139 . . . D,DB,DGV,N,NS OR PW PACKAGE (TOP VIEW) SN74AHC139 . . . RGY PACKAGE (TOP VIEW) 1 16 8 9 2 3 4 5 6 7 15 14 13 12 11 10 2G 2A 2B 2Y0 2Y1 2Y2 1A 1B 1Y0 1Y1 1Y2 1Y3 SN54AHC139 . . . J or W PACKAGE SN74AHC139 SN54AHC139 www.ti.com SCLS259L – DECEMBER 1995 – REVISED JUNE 2013 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS Check for Samples: SN74AHC139, SN54AHC139 1 FEATURES • Operating Range 2-V to 5.5-V • ESD Protection Exceeds JESD 22 • Designed Specifically for High-Speed Memory – 2000-V Human-Body Model (A114-A) Decoders and Data-Transmission Systems – 200-V Machine Model (A115-A) • Incorporate Two Enable Inputs to Simplify – 1000-V Charged-Device Model (C101) Cascading and/or Data Reception • Latch-Up Performance Exceeds 250 mA Per JESD 17 DESCRIPTION The ’AHC139 devices are dual 2-line to 4-line decoders/demultiplexers designed for 2-V to 5.5-V VCC operation. These devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When used with high-speed memories utilizing a fast enable circuit, the delay times of these decoders 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 decoders is negligible. FUNCTION TABLE (EACH GATE) INPUTS OUTPUT SELECT G Y0 Y1 Y2 Y3 B A H X X H H H H L L L L H H H L L H H L H H L H L H H L H L H H H H H L 1 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. PRODUCTION DATA information is current as of publication date. Copyright © 1995–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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