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ADM809-5LART-REEL-7 Datasheet(PDF) 1 Page - Analog Devices

No. de pieza ADM809-5LART-REEL-7
Descripción Electrónicos  Microprocessor Supervisory Circuit
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ADM809-5LART-REEL-7 Datasheet(HTML) 1 Page - Analog Devices

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Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADM809-5S/L
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
Microprocessor
Supervisory Circuit
FUNCTIONAL BLOCK DIAGRAM
VREF
VCC
RESET
GENERATOR
55ms
ADM809-5S/L
RESET
GND
FEATURES
Specified Over Temperature
Low Power Consumption (17
A)
Precision Voltage Monitor: 3 V, 5 V Options
Reset Assertion Down to 1 V VCC
30 ms min Power-On Reset
Logic Low
RESET Output
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
GENERAL DESCRIPTION
The ADM809-5S/L supervisory circuits monitor the power
supply voltage in microprocessor systems. It provides a reset
output during power-up, power-down and brownout conditions.
On power-up, an internal timer holds reset asserted for 55 ms.
This holds the microprocessor in a reset state until conditions
have stabilized. The
RESET output remains operational with
VCC as low as 1 V. The ADM809-5S/L provides an active low
reset signal (
RESET).
The reset comparator features built-in glitch immunity,
making it immune to fast transients on VCC.
The ADM809-5S/L consumes only 17
µA, making it suitable
for low power portable equipment.
RESET
RESET
INPUT
GND
GND
VCC
VCC
P
SYSTEM
ADM809-5S/L
VCC
Figure 1. Typical Operating Circuit


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