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SP810

Exar
Part Number SP810
Manufacturer Exar
Description 3 Pin Microprocessor Supervisor Circuit
Published May 19, 2015
Detailed Description February 2011 SP809 / SP810 3 Pin Microprocessor Supervisor Circuit Rev. 2.0.0 GENERAL DESCRIPTION The SP809/SP810 are...
Datasheet PDF File SP810 PDF File

SP810
SP810

Overview
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.
Low supply current (1μA) makes SP809/SP810 ideal for portable equipment.
The devices are available in 3 pin SOT-23 package.
APPLICATIONS • Portable Electronic Devices • Electrical Power Meters • Digital Still Cameras • µP Power Monitoring 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 TYPICAL APPLICATION DIAGRAM Fig.
1: SP809 / SP810 Application Diagram Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.
exar.
com Tel.
+1 510 668-7000 – Fax.
+1 510 668-7001 SP809 / SP810 3 Pin Microprocessor Supervisor Circuit ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied.
Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
VCC .
.
.
-0.
3V to 6.
5V RESET, RESET...


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