LTC1326 - Micropower Precision Triple Supply Monitor


  • Simultaneously Monitors Three Supplies
    LTC1326: 5V, 3.3V and ADJ
    LTC1326-2.5: 2.5V, 3.3V and ADJ
  • Guaranteed Threshold Accuracy: ±0.75%
  • Low Supply Current: 20µA
  • Internal Reset Time Delay: 200ms
  • Manual Push-Button Reset Input
  • Active Low and Active High Reset Outputs
  • Active Low “Soft” Reset Output
  • Power Supply Glitch Immunity
  • Guaranteed RESET for VCC3 >/= 1V or
    VCC5 >/= 1V or VCC25 >/= 1V
  • 8-Pin SO and MSOP Packages

Typical Application

LTC1326 Typical Application
LTC1326 Typical Application


The LTC1326/LTC1326-2.5 are triple supply monitors intended for systems with multiple supply voltages. They provide micropower operation, small size and high accuracy supply monitoring. Tight 0.75% threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. The 20µA typical supply current makes the LTC1326/LTC1326-2.5 ideal for power-conscious systems. The RST output is guaranteed to be in the correct state for VCC3, VCC5 or VCC25 down to 1V. The LTC1326/LTC1326-2.5 can be configured to monitor one, two or three inputs, depending on system requirements. A manual push-button reset input provides the ability to generate a very narrow “soft” reset pulse (100µs typ) or a 200ms reset pulse equivalent to a power-on reset. Both SRST and RST outputs are open-drain and can be OR-tied with other reset sources.


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
LTC1326CMS8-2.5#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1326CMS8-2.5#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1326CMS8#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1326CMS8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1326CS8-2.5#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1326CS8-2.5#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1326CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1326CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1326IMS8-2.5#PBF MS-8 MS8 I 05-08-1660 Yes
LTC1326IMS8-2.5#TRPBF MS-8 MS8 I 05-08-1660 Yes
LTC1326IMS8#PBF MS-8 MS8 I 05-08-1660 Yes
LTC1326IMS8#TRPBF MS-8 MS8 I 05-08-1660 Yes
LTC1326IS8-2.5#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1326IS8-2.5#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1326IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1326IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LTC1326 Package Drawing
LTC1326 Package Drawing
LTC1326 Package Drawing
LTC1326 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
LTC1326CMS8-2.5#PBF MS-8 C $2.85 $2.30 Yes
LTC1326CMS8-2.5#TRPBF MS-8 C $2.36 Yes
LTC1326CMS8#PBF MS-8 C $2.85 $2.30 Yes
LTC1326CMS8#TRPBF MS-8 C $2.36 Yes
LTC1326CS8-2.5#PBF SO-8 C $2.70 $2.20 Yes
LTC1326CS8-2.5#TRPBF SO-8 C $2.26 Yes
LTC1326CS8#PBF SO-8 C $2.70 $2.20 Yes
LTC1326CS8#TRPBF SO-8 C $2.26 Yes
LTC1326IMS8-2.5#PBF MS-8 I $3.85 $3.05 Yes
LTC1326IMS8-2.5#TRPBF MS-8 I $3.11 Yes
LTC1326IMS8#PBF MS-8 I $3.85 $3.05 Yes
LTC1326IMS8#TRPBF MS-8 I $3.11 Yes
LTC1326IS8-2.5#PBF SO-8 I $3.60 $2.95 Yes
LTC1326IS8-2.5#TRPBF SO-8 I $3.01 Yes
LTC1326IS8#PBF SO-8 I $3.60 $2.95 Yes
LTC1326IS8#TRPBF SO-8 I $3.01 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.

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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.

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