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ADG3247:  2.5 V/3.3 V, 16 Bit (Dual 8 Bit) , 2 Port Level Translator, Bus Switch

Product Details

The ADG3247 is a 2.5 V or 3.3 V 16 Bit (Dual 8 Bit), 2 port digital switch. It is designed on our low voltage CMOS process which provides low power dissipation yet gives high switching speed and very low on resistance allowing inputs to be connected to the outputs without additional propagation delay or generating additional ground bounce noise.

The switches are enabled by means of the Bus Enable, () input signal. These digital switches allow bi-directional signals to be switched when ON. In the OFF condition, signal levels up to the supplies are blocked. This device is ideal for applications requiring level translation. When operated from a 3.3 V supply, level translation from 3.3V inputs to 2.5V outputs is allowed. Similarly, if the device is operated from a 2.5 V supply and 2.5 V inputs are applied, the device will translate the outputs to 1.8 V. In addition to this, a level translating select pin () is included. When is low, VCC is reduced internally allowing for level translation between 3.3V inputs and 1.8V outputs. This makes the device suited to applications requiring level translation between different supplies, such as converter to DSP interfacing.


  • 175 ps Propagation Delay through the Switch
  • 3.5 Ω Switch Connection between Ports
  • 2.5 V/3.3 V Supply Operation
  • 40 Lead 6 x 6mm Chip Scale and
    38 Lead TSSOP Packages
  • 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

Functional Block Diagram for ADG3247


Title Content Type File Type
ADG3247: 2.5 V/3.3 V, 16 Bit, 2 Port Level Translator, Bus Switch Data Sheet  (Rev 0, 05/2003) (pdf, 380 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
Enhanced Multiplexing for MEMS Optical Cross Connects
by James Caffrey (Fiberoptic Product News, 8/2003)
Technical Articles HTML
Bus Switches for Speed, Safety, and Efficiency: What They Are and What You Should Know About Them.
Bus switches are characterized by sub-nanosecond propagation delay and fast switching, and are designed for connecting to high-speed digital buses. They are ideally suited for voltage translation, hot swapping, hot plug, bus- or capacitance isolation, and many other applications. The key features that make them suitable for so many different applications include low on-resistance, low capacitance, and low propagation delay.
Analog Dialogue HTML
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

ADG3247 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADG3247BCPZ Status: Last Time Buy 40 ld LFCSP (6x6mm w.4.1mm pad) 40 Ind Tray, 490 $1.20 $0.99 Y  Material Info PCN/PDN Purchase
ADG3247BRU Status: Last Time Buy 38 ld TSSOP 38 Ind Tube, 50 $1.68 $1.39 N  Material Info PCN/PDN Purchase
ADG3247BRU-REEL7 Status: Last Time Buy 38 ld TSSOP 38 Ind Reel, 1000 - $1.39 N  Material Info PCN/PDN Purchase
ADG3247BRUZ Status: Production 38 ld TSSOP 38 Ind Tube, 50 $1.46 $1.19 Y  Material Info PCN Purchase Sample
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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