Features and Benefits

  • Simultaneously Monitors 5V, 3.3V and Adjustable Inputs
  • Guaranteed Threshold Accuracy: ±0.75%
  • Low Supply Current: 100µA
  • Internal Reset Time Delay: 200ms
  • Manual Pushbutton Reset Input
  • Active Low and Active High Reset Outputs
  • Active Low “Soft” Reset Output
  • Power Supply Glitch Immunity
  • Guaranteed Reset for Either VCC3 > 1V or VCC5 > 1V
  • Meets PCI tFAIL Timing Specifications Rev 2.1
  • 8-Pin SO and MSOP Packages

Product Details

The LTC1536 is designed for PCI local bus applications with multiple supply voltages that require low power, small size, high speed and high accuracy supply monitoring.

For 3.3V and 5V supplies that are >500mV below spec or for the condition when the 5V supply falls below the 3.3V supply, the LTC1536 has a very fast response time capable of meeting the PCI tFAIL timing specification. Tight 0.75% threshold accuracy and glitch immunity ensure reliable reset operation without false triggering.

The RST output is guaranteed to be in the correct state for VCC5 or VCC3 down to 1V. The 100µA typical supply current makes the LTC1536 ideal for power-conscious systems.

A manual pushbutton 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.


  • PCI-Based Systems
  • Desktop Computers
  • Notebook Computers
  • Intelligent Instruments
  • Portable Battery-Powered Equipment
  • Network Servers

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.

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.

PCN-PDN Information

Sample & Buy

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