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Advanced Analogic Technologies - MicroPower Microprocessor Reset Circuit

Numéro de référence AAT3532IAS-B1
Description MicroPower Microprocessor Reset Circuit
Fabricant Advanced Analogic Technologies 
Logo Advanced Analogic Technologies 





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AAT3532IAS-B1 fiche technique
AAT3532
MicroPower™ Microprocessor Reset Circuit
General Description
The AAT3532 PowerManager™ product is a mem-
ber of AATI’s Total Power Management ICs™
(TPMIC™) product family. It is a fully integrated
device for monitoring microprocessor activity,
external reset, and power supply conditions. The
device holds the microprocessor in a reset condi-
tion for a minimum of 250ms while VCC is estab-
lished to ensure correct system start-up. A manual
reset can be initiated via a de-bounced input pin.
As an additional level of protection, the AAT3532
includes a watchdog timer which requires a period-
ic strobe input from the microprocessor to ensure
correct operation. The AAT3532 has a programma-
ble watchdog timer and voltage tolerance level.
The quiescent supply current is extremely low, typ-
ically 23µA.
The AAT3532 is available in an 8-pin SOP package
specified over -40° to 85°C temperature range.
Features
PowerManager
• Adjustable 4.5V or 4.75V Voltage Monitor
• 250ms (min) Reset Pulse Width
• Low quiescent current: typically 23µA
• Adjustable Watchdog Timer (150ms, 600ms,
or 1200ms)
• De-bounced Manual Reset Input
• Operates down to 20ns strobe input pulse
width
• No external components
• Temp range -40° to 85°C
• Standard 8 pin SOP package
• Pin compatible with MAX1232
Applications
• Computers
• Controllers
• Telecom Equipment
• Embedded Systems
• Intelligent Instrumentation
• Automotive
Typical Application
VDD
VCC
PBRST
AAT3532
TD
TOL
GND
RST
RST
ST
VDD
RESET
INPUT
µP
I/O
3532.2001.11.0.9
1

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