ADM809-5LART-REEL-7 Просмотр технического описания (PDF) - Analog Devices
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ADM809-5LART-REEL-7 Datasheet PDF : 6 Pages
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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
Microprocessor
Supervisory Circuit
ADM809-5S/L
FUNCTIONAL BLOCK DIAGRAM
ADM809-5S/L
VCC
VREF
RESET
GENERATOR
55ms
GND
RESET
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.
VCC
VCC
ADM809-5S/L
RESET
VCC
RESET
P
INPUT SYSTEM
GND
GND
Figure 1. Typical Operating Circuit
REV. 0
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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.
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Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
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© Analog Devices, Inc., 2000
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