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AAT3532 Datasheet, PDF (1/8 Pages) Advanced Analogic Technologies – MicroPower™ Microprocessor Reset Circuit | |||
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AAT3532
MicroPower⢠Microprocessor Reset Circuit
General Description
The AAT3532 PowerManager is a member of
AnalogicTechâs Total Power Management ICâ¢
(TPMICâ¢) 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 a Pb-free, 8-pin SOP
package and is specified over the -40°C to +85°C
temperature range.
Features
PowerManagerâ¢
⢠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
⢠Temperature Range: -40° to +85°C
⢠Standard 8-Pin SOP Package
⢠Pin Compatible with MAX1232
Applications
⢠Automotive
⢠Computers
⢠Controllers
⢠Embedded Systems
⢠Intelligent Instrumentation
⢠Telecom Equipment
Typical Application
VDD
VCC
PBRST
RST
AAT3532
RST
TD
ST
TOL
GND
VDD
RESET
INPUT
µP
I/O
3532.2005.12.1.2
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