LT1675 - 250MHz, Triple and Single RGB Multiplexer with Amplifiers


  • 100MHz Pixel Switching
  • -3dB Bandwidth: 250MHz
  • Channel Switching Time: 2.5ns
  • Expandable to Larger Arrays
  • Drives Cables Directly
  • High Slew Rate: 1100V/µs
  • Low Switching Transient: 50mV
  • Shutdown Supply Current: 100µA
  • Output Short-Circuit Protected
  • Available in Small 16-Pin SSOP Package

Typical Application

LT1675 Typical Application
LT1675 Typical Application


The LT1675 is a high speed RGB multiplexer designed for pixel switching and fast workstation graphics. Included on chip are three SPDT switches and three current feedback amplifiers. The current feedback amplifiers drive double-terminated 50 Ohm or 75 Ohm cables and are configured for a fixed gain of 2, eliminating six external gain setting resistors. The SPDT switches are designed to be break-before-make to minimize unwanted signals coupling to the input.

The LT1675-1 is a single version with two inputs, a single output and is ideal for a single channel application such as video sync.

The key to the LT1675 fast switching speed is Linear Technology's proprietary high speed bipolar process. This MUX can toggle between sources in excess of 100MHz, has a slew rate over 1000V/µs and has a -3dB bandwidth of 250MHz. Power supply requirements are ±4V to ±6V and power dissipation is only 300mW on ±5V, or 100mW for the LT1675-1. The expandable feature uses the disable pin to reduce the power dissipation to near 0mW in the off parts.

Unlike competitive solutions that are in bulky high pin count packages, the LT1675 is in a 16-lead narrow body SSOP. This small footprint, the size of an SO-8, results in a very clean high performance solution. The LT1675-1 is available in the tiny MSOP and the SO-8.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LT1675CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LT1675CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LT1675CMS8-1#PBF MS-8 MS8 C 05-08-1660 Yes
LT1675CMS8-1#TRPBF MS-8 MS8 C 05-08-1660 Yes
LT1675CS8-1#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1675CS8-1#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes

LT1675 Package Drawing
LT1675 Package Drawing
LT1675 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LT1675CGN#PBF SSOP-16 C $3.95 $3.25 Yes
LT1675CGN#TRPBF SSOP-16 C $3.42 Yes
LT1675CMS8-1#PBF MS-8 C $2.55 $2.15 Yes
LT1675CMS8-1#TRPBF MS-8 C $2.21 Yes
LT1675CS8-1#PBF SO-8 C $2.30 $1.95 Yes
LT1675CS8-1#TRPBF SO-8 C $2.01 Yes
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* 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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC240A LT1675CGN | 250MHz RGB Video 2:1 Multiplexer with C.F. Amplifier Contact Factory
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Click here to view our complete list of demo boards


  • RGB Switching
  • Workstation Graphics
  • Pixel Switching
  • Coaxial Cable Drivers
  • High Speed Signal Processing

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support