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CD74ACT138E 데이터시트(PDF) 1 Page - Texas Instruments |
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CD74ACT138E 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 16 page CD54ACT138, CD74ACT138 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS SCHS329A – JANUARY 2003 – REVISED FEBRUARY 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Inputs Are TTL-Voltage Compatible D Speed of Bipolar F, AS, and S, With Significantly Reduced Power Consumption 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 Balanced Propagation Delays D ±24-mA Output Drive Current – Fanout to 15 F Devices D SCR-Latchup-Resistant CMOS Process and Circuit Design D Exceeds 2-kV ESD Protection Per MIL-STD-883, Method 3015 description/ordering information The ’ACT138 decoders/demultiplexers are designed for high-performance memory-decoding and data-routing applications that require very short propagation-delay times. In high-performance memory systems, these decoders 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 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. 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 (see Application Information). ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP – E Tube CD74ACT138E CD74ACT138E 55 °Cto125°C SOIC M Tube CD74ACT138M ACT138M –55 °C to 125°C SOIC – M Tape and reel CD74ACT138M96 ACT138M CDIP – F Tube CD54ACT138F3A CD54ACT138F3A † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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. Copyright 2003, 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. 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 CD54ACT138 ...F PACKAGE CD74ACT138 ...E OR M PACKAGE (TOP VIEW) |
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