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LM810 Datasheet 3-pin Microprocessor Reset Circuits

Manufacturer: Texas Instruments

Overview: Product Folder Sample & Buy Technical Documents Tools & Software Support & munity LM809, LM810 SNVS052E – SEPTEMBER 1999 – REVISED APRIL 2016 LM809/LM810 3-Pin Microprocessor Reset Circuits.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

The LM809 and LM810 microprocessors supervisory circuits can be used to monitor the power supplies in microprocessor and digital systems.

They provide a reset to the microprocessor during power-up, powerdown and brown-out conditions.

The function of the LM809 and LM810 are to monitor the VCC supply voltage, and assert a reset signal whenever this voltage declines below the factoryprogrammed reset threshold.

Key Features

  • 1 Precision Monitoring of Supply Voltages.
  • Available Threshold Options: 2.63 V, 2.93 V, 3.08 V, 4.38 V, 4.63 V.
  • Superior Upgrade to MAX809 and MAX810.
  • Fully Specified Over Temperature.
  • 140-ms Minimum Power-On Reset Pulse Width, 240-ms Typical.
  • Active-Low RESET Output (LM809).
  • Active-High RESET Output (LM810).
  • Ensured RESET Output Valid for VCC ≥ 1 V.
  • Low Supply Current, 15-µA Typical.
  • Power Supply Transient.

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