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74ACT11238 Arkusz danych(PDF) 1 Page - Texas Instruments |
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74ACT11238 Arkusz danych(HTML) 1 Page - Texas Instruments |
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1 / 7 page  74ACT11238 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER SCAS054 – NOVEMBER 1988 – REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Copyright © 1993, Texas Instruments Incorporated 2–1 • Designed Specifically for High-Speed Memory Decoders and Data Transmission Systems • Noninverting Version of ′ACT11138 • Incorporates 3 Enable Inputs to Simplify Cascading and/or Data Reception • Inputs Are TTL-Voltage Compatible • Flow-Through Architecture Optimizes PCB Layout • Center-Pin V CC and GND Configurations Minimize High-Speed Switching Noise • EPICt (Enhanced-Performance Implanted CMOS) 1- mm Process • 500-mA Typical Latch-Up Immunity at 125 °C • Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs description The 74ACT11238 circuit is designed to be used in high-performance memory-decoding or data-routing applications requiring 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 are usually 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 input 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 74ACT11238 is characterized for operation from – 40 °C to 85°C. FUNCTION TABLE ENABLE SELECT OUTPUTS INPUTS INPUTS OUTPUTS G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X H X X X X L L L L L L L L X XH X XX L LL LL LL L L XX X XX L LL LL LL L H LL L LL H LL LL LL L H LL L LH L H L LL LL L H LL L HL L L H LL LL L H LL L HH L LL H L LL L H LL H LL L LL L H LL L H LL H LH L LL LL H L L H LL H HL L LL LL L H L H L L H H H L L L L L L L H D OR N PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Y1 Y2 Y3 GND Y4 Y5 Y6 Y7 Y0 A B C VCC G1 G2A G2B 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. EPIC is a trademark of Texas Instruments Incorporated. |
Podobny numer części - 74ACT11238 |
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Podobny opis - 74ACT11238 |
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