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SP809 - 3 Pin Microprocessor Supervisor Circuit

Description

The SP809/SP810 are low power microprocessor (μP) supervisory circuits used to monitor power supplies in μP and digital systems.

They provide applications with benefits of circuit reliability and low cost by eliminating external components.

Features

  • Ultra Low Supply Current 1µA (typ).
  • Guaranteed Reset valid to VCC = 0.9V.
  • 140ms Power-On Reset Pulse Width.
  • Internally Fixed Threshold 2.3V, 2.6V, 2.9V, 3.1V, 4.4V, 4.6V.
  • 1.5% Voltage Threshold Tolerance.
  • 3 Pin SOT-23 Package Part Number SP809N SP809 SP810 Output Type Open Drain Active Low Push-Pull Low Push-Pull Active High.

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Other Datasheets by Exar (now MaxLinear)

Part Number Description
SP810 3 Pin Microprocessor Supervisor Circuit
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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February 2011 SP809 / SP810 3 Pin Microprocessor Supervisor Circuit Rev. 2.0.0 GENERAL DESCRIPTION The SP809/SP810 are low power microprocessor (μP) supervisory circuits used to monitor power supplies in μP and digital systems. They provide applications with benefits of circuit reliability and low cost by eliminating external components. If the VCC supply voltage falls below preset threshold then a reset signal is asserted for at least 140ms after VCC has risen above the reset threshold. Both the SP809 and SP810 were designed with a reset comparator to help identify invalid signals, which last less than 140ms. The only difference between them is that they have an active-low RESET output and active-high RESET output, respectively.
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