1. Products
  2. Power Monitor, Control, and Protection
  3. Supervisory Circuits
  4. Dual-Supply Monitors
  5. LTC2904


Features and Benefits

  • Monitors Two Inputs Simultaneously
  • Nine Threshold Combinations
  • Three Supply Tolerances (5%, 7.5%, 10%)
  • Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
  • Internal VCC Auto Select
  • Power Supply Glitch Immunity
  • 200ms Reset Time Delay (LTC2904 Only)
  • Adjustable Reset Time Delay (LTC2905 Only)
  • Open Drain RST Output
  • Guaranteed RST for V1 ≥ 1V or V2 ≥ 1V
  • Low Profile (1mm) SOT-23 (ThinSOT) and Plastic (3mm × 2mm) DFN Packages

Product Details

The LTC2904/LTC2905 are dual supply monitors intended for systems with two supply voltages. The dual supply monitors have a common reset output with delay (200ms for the LTC2904 and adjustable using an external capacitor for the LTC2905). This product provides a precise, space-conscious and micropower solution for supply monitoring.

The LTC2904/LTC2905 feature a tight 1.5% threshold accuracy over the whole operating temperature range, and glitch immunity to ensure reliable reset operation without false triggering. The open drain RST output is guaranteed to be in the correct state for inputs down to 1V.

The LTC2904/LTC2905 also feature three programming input pins, which program the threshold and tolerance level without requiring any external components. These three programming pins provide a total of 27 different voltage level and tolerance combinations, eliminating the need to have different parts for development and implementation of different systems with different voltage levels requiring monitoring function.


  • Desktop and Notebook Computers
  • Handheld Devices
  • Network Servers
  • Core, I/O Monitor

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Models for the following parts are available in LTspice:


Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC2904CDDB#TRMPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 2mm w/ EP)
LTC2904CDDB#TRPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 2mm w/ EP)
LTC2904CTS8#TRMPBF Material Declaration Reliability Data 8-Lead SOT-23
LTC2904CTS8#TRPBF Material Declaration Reliability Data 8-Lead SOT-23
LTC2904IDDB#TRMPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 2mm w/ EP)
LTC2904IDDB#TRPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 2mm w/ EP)
LTC2904ITS8#TRMPBF Material Declaration Reliability Data 8-Lead SOT-23
LTC2904ITS8#TRPBF Material Declaration Reliability Data 8-Lead SOT-23
Wafer Fabrication Data R413 Reliability Data

Sample & Buy

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Buy Now Pricing

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List Pricing

(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



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