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Date: 5/02/06 Rev B

SP809/810, 3 Pin Microprocessor Supervisor Circuit

© Copyright 2006 Sipex Corporation

3 Pin Microprocessor Supervisor Circuit

SP809 / SP810

DESCRIPTION

FEATURES

■ Ultra Low Supply Current 1µA (typ.)

■ 140 ms Min. Power-On Reset Pulse Width

■ Internally Fixed Threshold 2.3V, 2.6V, 2.9V,

3.1V, 4.0V, 4.4V, 4.6V

■ Tight Voltage Threshold Tolerance: 1.5%

■ Offered in a 3 Pin SOT-23 Package

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 V

preset threshold then a reset signal is asserted for at least 140ms after V

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.

TYPICAL APPLICATION CIRCUIT

APPLICATIONS

■ Portable Electronic Devices

■ Electrical Power Meter

■ Digital Still Camera

■ µP Power Monitoring

Now Available in Lead Free Packaging

SP809

3 Pin SOT-23

RESET

GND

RESET

GND

VCC

RESET

(RESET)

VCC

VCC

GND

Push-Pull output

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