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SN74LVC138A Datasheet(PDF) 1 Page - Texas Instruments |
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SN74LVC138A Datasheet(HTML) 1 Page - Texas Instruments |
1 / 9 page SN54LVC138A, SN74LVC138A 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS SCAS291I – MARCH 1993 – REVISED OCTOBER 1998 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D EPIC™ (Enhanced-Performance Implanted CMOS) Submicron Process D ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) D Latch-Up Performance Exceeds 250 mA Per JESD 17 D Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C D Typical VOHV (Output VOH Undershoot) > 2 V at VCC = 3.3 V, TA = 25°C D Inputs Accept Voltages to 5.5 V D Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK) and Flat (W) Package, and DIPs (J) description The SN54LVC138A 3-line to 8-line decoder/ demultiplexer is designed for 2.7-V to 3.6-V VCC operation and the SN74LVC138A 3-line to 8-line decoder/demultiplexer is designed for 1.65-V to 3.6-V VCC operation. The ’LVC138A devices are designed for high- performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders 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 are usually 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 enable inputs and one active-high enable input 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. Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment. The SN54LVC138A is characterized for operation over the full military temperature range of –55 °C to 125°C. The SN74LVC138A is characterized for operation from –40 °C to 85°C. Copyright © 1998, 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. 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 SN54LVC138A ...J OR W PACKAGE SN74LVC138A . . . D, DB, OR PW PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 Y1 Y2 NC Y3 Y4 C G2A NC G2B G1 SN54LVC138A . . . FK PACKAGE (TOP VIEW) NC – No internal connection 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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