LT1719 - 4.5ns Single/Dual Supply 3V/5V Comparator with Rail-to-Rail Output


  • UltraFast: 4.5ns at 20mV Overdrive
                   7ns at 5mV Overdrive
  • Low Power: 4.2mA at 3V
  • Separate Input and Output Power Supplies (SO-8 Only)
  • Output Optimized for 3V and 5V Supplies
  • TTL/CMOS Compatible Rail-to-Rail Output
  • Low Power Shutdown Mode: 0.1μA
  • Low Profi le (1mm) SOT-23 (ThinSOT™) Package

Typical Application

LT1719 Typical Application
LT1719 Typical Application


The LT1719 is an UltraFast comparator optimized for low voltage operation. The input voltage range extends from 100mV below VEE to 1.2V below VCC. Internal hysteresis makes the LT1719 easy to use even with slow moving input signals. The rail-to-rail outputs directly interface to TTL and CMOS. Alternatively the symmetric output drive can be harnessed for analog applications or for easy translation to other single supply logic levels. A shutdown control allows for reduced power consumption and extended battery life in portable applications.

The LT1719 is available in the SO-8 and 6-lead SOT-23 package. The SO-8 package has separate supplies which allow flexible operation, accomodating separate analog input ranges and output logic levels.

For a dual/quad comparator with similar performance, see the LT1720/LT1721.


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
LT1719CS6#PBF SOT-23 S6 C 05-08-1636 Yes
LT1719CS6#TRMPBF SOT-23 S6 C 05-08-1636 Yes
LT1719CS6#TRPBF SOT-23 S6 C 05-08-1636 Yes
LT1719CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1719CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1719IS6#PBF SOT-23 S6 I 05-08-1636 Yes
LT1719IS6#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LT1719IS6#TRPBF SOT-23 S6 I 05-08-1636 Yes
LT1719IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1719IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LT1719 Package Drawing
LT1719 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
LT1719CS6#PBF SOT-23 C $1.77 Yes
LT1719CS6#TRMPBF SOT-23 C $1.77 $1.42 Yes
LT1719CS6#TRPBF SOT-23 C $1.77 $1.40 Yes
LT1719CS8#PBF SO-8 C $2.30 $1.95 Yes
LT1719CS8#TRPBF SO-8 C $2.01 Yes
LT1719IS6#PBF SOT-23 I $1.92 Yes
LT1719IS6#TRMPBF SOT-23 I $1.92 $1.63 Yes
LT1719IS6#TRPBF SOT-23 I $1.92 $1.61 Yes
LT1719IS8#PBF SO-8 I $2.55 $2.15 Yes
LT1719IS8#TRPBF SO-8 I $2.21 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.

Click here to view our complete list of demo boards


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