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SN74LVC138AD Datasheet(PDF) 2 Page - Texas Instruments |
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SN74LVC138AD Datasheet(HTML) 2 Page - Texas Instruments |
2 / 34 page SN54LVC138A, SN74LVC138A SCAS291V – MARCH 1993 – REVISED JANUARY 2013 www.ti.com DESCRIPTION/ORDERING INFORMATION 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, 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 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. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING QFN – RGY Reel of 1000 SN74LVC138ARGYR LC138A QFN – RSV Reel of 3000 SN74LVC138ARSVR ZTP Tube of 40 SN74LVC138AD SOIC – D Reel of 2500 SN74LVC138ADR LVC138A Reel of 250 SN74LVC138ADT SOP – NS Reel of 2000 SN74LVC138ANSR LVC138A –40°C to 85°C SSOP – DB Reel of 2000 SN74LVC138ADBR LC138A Tube of 90 SN74LVC138APW TSSOP – PW Reel of 2000 SN74LVC138APWR LC138A Reel of 250 SN74LVC138APWT TVSOP – DGV Reel of 2000 SN74LVC138ADGVR LC138A VFBGA – GQN SN74LVC138AGQNR Reel of 1000 LC138A VFBGA – ZQN (Pb-free) SN74LVC138AZQNR CDIP – J Tube of 25 SNJ54LVC138AJ SNJ54LVC138AJ –55°C to 125°C CFP – W Tube of 150 SNJ54LVC138AW SNJ54LVC138AW LCCC – FK Tube of 55 SNJ54LVC138AFK SNJ54LVC138AFK (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 2 Submit Documentation Feedback Copyright © 1993–2013, Texas Instruments Incorporated Product Folder Links: SN54LVC138A SN74LVC138A |
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