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ADG3249:  2.5 V/3.3 V, 2:1 Multiplexer/Demultiplexer Bus Switch

Product Details

The ADG3249 is a 2.5 V or 3.3 V, high performance 2:1 multiplexer/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 propagation delay or generating additional ground bounce noise. Each switch of the ADG3249 conducts equally well in both directions when on. The ADG3249 exhibits break-before-make switching action, preventing momentary shorting when switching 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, VCC is reduced internally, allowing for level translating between 3.3 V inputs and 1.8 V outputs.

The AD3249 is available in a tiny 8-lead SOT-23 package.


  • 225 ps Propagation Delay through the Switch
  • 4.5 Ω 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

Functional Block Diagram for ADG3249


Title Content Type File Type
ADG3249: 2.5 V/3.3 V, 2:1 Multiplexer/Demultiplexer Bus Switch Data Sheet  (Rev 0, 10/2003) (pdf, 220 kB) Data Sheets PDF
Data-acquisition system uses fault protection
By Catherine Redmond, Analog Devices, Inc. (EDN, 4/15/2004)
Technical Articles HTML
CMOS Switches Offer High Performance in Low Power, Wideband Applications  (pdf, 320 kB)
by Theresa Corrigan and Ray Goggin, Analog Devices, Inc. (High Frequency Electronics, February 2004)
Technical Articles PDF
Switches and Multiplexers Product Selection Guide  (pdf, 1462 kB) Product Selection Guide PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

ADG3249 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADG3249BRJ-R2 Status: Last Time Buy 8 ld SOT-23 8 Ind Reel, 250 - - N  Material Info PDN Purchase
ADG3249BRJ-REEL Status: Last Time Buy 8 ld SOT-23 8 Ind Reel, 10000 - $0.66 N  Material Info PCN/PDN Purchase
ADG3249BRJ-REEL7 Status: Last Time Buy 8 ld SOT-23 8 Ind Reel, 3000 - - N  Material Info PCN/PDN Purchase
ADG3249BRJZ-REEL7 Status: Last Time Buy 8 ld SOT-23 8 Ind Reel, 3000 - $0.57 Y  Material Info PCN/PDN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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