LT6556 - 750MHz Gain of 1 Triple 2:1Video Multiplexer


  • 750MHz -3dB Small Signal Bandwidth
  • 450MHz -3dB 2VP-P Large-Signal Bandwidth
  • 120MHz ±0.1dB Bandwidth
  • High Slew Rate: 2100V/μs
  • Fixed Gain of 1; No External Resistors Required
  • 72dB Channel Separation at 10MHz
  • 52dB Channel Separation at 100MHz
  • -84dBc 2nd Harmonic Distortion at 10MHz, 2VP-P
  • -87dBc 3rd Harmonic Distortion at 10MHz, 2VP-P
  • Low Supply Current: 9.5mA per Amplifi er
  • 6.5ns 0.1% Settling Time for 2V Step
  • ISS ≤ 330μA per Amplifier When Disabled
  • Differential Gain of 0.033%, Differential Phase of 0.022°
  • Wide Supply Range: ±2.25V (4.5V) to ±6V (12V)
  • Available in 24-Lead SSOP and 24-Lead QFN Packages

Typical Application

LT6556 Typical Application
LT6556 Typical Application


The LT®6556 is a high speed triple 2:1 video multiplexer with an internally fixed gain of 1. The individual buffers are optimized for performance with a 1k load and feature a 2VP-P -3dB bandwidth of 450MHz, making them ideal for driving very high resolution video signals. Separate power supply pins for each amplifi er boost channel separation to 72dB, allowing the LT6556 to excel in many high speed applications.

While the performance of the LT6556 is optimized for dual supply operation, it can also be operated with a single supply as low as 4.5V. Using dual 5V supplies, each amplifier draws only 9.5mA. When disabled, the amplifiers draw less than 330µA and the outputs become high impedance. For applications requiring a fi xed gain of 2, refer to the LT6555 datasheet.

The LT6556 is available in 24-lead SSOP and ultra-compact 24-lead QFN packages.


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
LT6556CGN#PBF SSOP-24 GN C 05-08-1641 (GN24) Yes
LT6556CGN#TRPBF SSOP-24 GN C 05-08-1641 (GN24) Yes
LT6556CUF#PBF 4x4 QFN-24 UF C 05-08-1697 Yes
LT6556CUF#TRPBF 4x4 QFN-24 UF C 05-08-1697 Yes
LT6556IGN#PBF SSOP-24 GN I 05-08-1641 (GN24) Yes
LT6556IGN#TRPBF SSOP-24 GN I 05-08-1641 (GN24) Yes
LT6556IUF#PBF 4x4 QFN-24 UF I 05-08-1697 Yes
LT6556IUF#TRPBF 4x4 QFN-24 UF I 05-08-1697 Yes

LT6556 Package Drawing
LT6556 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
LT6556CGN#PBF SSOP-24 C $3.90 $2.75 Yes
LT6556CGN#TRPBF SSOP-24 C $2.81 Yes
LT6556CUF#PBF 4x4 QFN-24 C $3.90 $2.75 Yes
LT6556CUF#TRPBF 4x4 QFN-24 C $2.81 Yes
LT6556IGN#PBF SSOP-24 I $4.50 $3.15 Yes
LT6556IGN#TRPBF SSOP-24 I $3.21 Yes
LT6556IUF#PBF 4x4 QFN-24 I $4.50 $3.15 Yes
LT6556IUF#TRPBF 4x4 QFN-24 I $3.21 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
DC892A-B LT6556CUF | 650MHz Triple Video Amplifier Fixed Gain of 1 $75.00
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