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ADG3249 Datasheet(PDF) 1 Page - Analog Devices |
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ADG3249 Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page REV. 0 ADG3249 2.5 V/3.3 V, 2:1 Multiplexer/ Demultiplexer Bus Switch Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. FEATURES 225 ps Propagation Delay through the Switch 4.5 Switch Connection between Ports Data Rate 1.244 Gbps 2.5 V/3.3 V Supply Operation Selectable Level Shifting/Translation Level Translation 3.3 V to 2.5 V 3.3 V to 1.8 V 2.5 V to 1.8 V Small Signal Bandwidth 610 MHz 8-Lead SOT-23 Package APPLICATIONS 3.3 V to 1.8 V Voltage Translation 3.3 V to 2.5 V Voltage Translation 2.5 V to 1.8 V Voltage Translation Docking Stations Memory Switching Analog Switch Applications FUNCTIONAL BLOCK DIAGRAM EN ADG3249 A0 A1 B CONTROL LOGIC IN GENERAL DESCRIPTION The ADG3249 is a 2.5 V or 3.3 V, high performance 2:1 multi- plexer/demultiplexer bus switch. It is designed on a low voltage CMOS process, which provides low power dissipation yet gives high switching speed and very low on resistance. This allows the input to be connected to the output without additional propaga- tion delay or generating additional ground bounce noise. Each switch of the ADG3249 conducts equally well in both direc- tions when on. The ADG3249 exhibits break-before-make switching action, preventing momentary shorting when switch- ing channels. This device is ideal for applications requiring level translation. When operated from a 3.3 V supply, level translation from 3.3 V inputs to 2.5 V outputs is allowed. Similarly, if the device is operated from 2.5 V supply and 2.5 V inputs are applied, the device will translate the outputs to 1.8 V. In addition, a level translating pin ( SEL) is included. When SEL is low, V CC is reduced internally, allowing for level translating between 3.3 V inputs and 1.8 V outputs. The ADG3249 is available in a tiny 8-lead SOT-23 package. PRODUCT HIGHLIGHTS 1. 3.3 V or 2.5 V supply operation. 2. Extremely low propagation delay through switch. 3. 4.5 Ω switches connect inputs to outputs. 4. Tiny SOT-23 package. |
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