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SP730_05 Datasheet

  • SP730_05

  • Microprocessor Supervisory Circuit with Pull Up Resistor

  • 7頁

  • SIPEX

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SP730
Microprocessor Supervisory Circuit with Pull Up Resistor
FEATURES
鈻?/div>
Holds Microcontroller in Reset
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Reset Microcontroller during power loss
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4.375 and 3.075 Voltage Trip Points
鈻?/div>
Active Low
Pin
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Internal Pull-up Resistor
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Holds RESET for 350ms (typical)
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RESET valid down to V
DD
1.0V
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45碌A(chǔ) Typical Operating Current
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Offered in a 3 Pin SOT-23 Package
GND
SP730
3 Pin SOT-23
RESET
V
DD
Now Available in Lead Free Packaging
APPLICATIONS
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Portable Electronic Devices
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Electrical Power Meter
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Computer System Board
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Modem
DESCRIPTION
The SP730 is a voltage supervisory device designed to keep a microcontroller in reset until the
system voltage has reached the proper level and stabilized. It also operates as protection from
brown-out conditions when the supply voltage drops below a safe operating level. The SP730
has an internal 5k鈩?pull-up resistor. The device has an active low RESET pin and will assert
the RESET signal whenever the voltage on the V
DD
pin is below the trip-point voltage. The part
is available in a small 3 pin SOT-23 package. Contact factory for other trip voltage options.
TYPICAL APPLICATION CIRCUIT
VDD
Microcontroller
SP730
VDD
GND
RESET
Bypass
Capacitor
VDD
MCLR
or
RESET
GND
Date: 11/15/05
SP730 Microprocessor Supervisory Circuit
漏 Copyright 2005 Sipex Corporation
1

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