AAT3532 Advanced Analogic Technologies, Inc., AAT3532 Datasheet

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AAT3532

Manufacturer Part Number
AAT3532
Description
Aat3532 | Micropower Supervisory Circuit With Delay, Manual Reset, And Watchdog
Manufacturer
Advanced Analogic Technologies, Inc.
Datasheet
General Description
The AAT3532 PowerManager is a member of
AnalogicTech’s Total Power Management IC™
(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 V
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.
3532.2005.12.1.2
Typical Application
PBRST
TD
TOL
CC
AAT3532
is estab-
VCC
GND
MicroPower™ Microprocessor Reset Circuit
V
DD
RST
RST
ST
Features
Applications
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
Automotive
Computers
Controllers
Embedded Systems
Intelligent Instrumentation
Telecom Equipment
RESET
INPUT
I/O
V
µP
DD
PowerManager
AAT3532
1

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AAT3532 Summary of contents

Page 1

... 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. Typical Application 3532.2005.12.1.2 MicroPower™ ...

Page 2

... MicroPower™ Microprocessor Reset Circuit Timeout Min Typ 62.5ms 150ms 250ms 600ms 500ms 1200ms TOL Pin Tolerance V 10% CC GND 5% SOP-8 (Top View) V PBRST TOL RST 3 6 GND RST 4 5 AAT3532 falls below the reset voltage CC Max 250ms 1000ms 2000ms CC 3532.2005.12.1.2 ...

Page 3

... Only one Absolute Maximum Rating should be applied at any one time. 2. Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. 3. Mounted on an FR4 board. 3532.2005.12.1.2 MicroPower™ Microprocessor Reset Circuit 1 3 AAT3532 Value Units -0 -0 +0.5) ...

Page 4

... Conditions 25º 25ºC A See Figure 2 See Figure 2 See Figure 3 TD Pin = 0V TD Pin = Open TD Pin = V CC 4.75V to 4.25V 4.25V to 4.75V V Falling CC V Rising CC AAT3532 = 25°C. A Min Typ Max Units 4.5 5.0 5 µA 160 500 4.50 4.62 4.74 V 4.25 4.37 4.49 -1.0 1.0 µA -8.0 mA 10 ...

Page 5

... V +5V +4.75V (5% Trip Point) +4.50V (10% Trip Point RPU RPD Figure 1: Reset Output Delay. AAT3532 RST Reset Generator RST sets the 10% tolerance of CC supply (typically 4.37V for 5V). The ...

Page 6

... Watchdog Timer The watchdog timer monitors the microprocessor to ensure that the system is functioning correctly. The ST pin of the AAT3532 can be derived from the microprocessor data signals, address signals, and/or I/O signals. The watchdog timer function forces the RST and RST signals into the active state when the ST input is not toggled by a pre- determined time ...

Page 7

... BSC All dimensions in millimeters. 1. Sample stock is generally held on all part numbers listed in BOLD. 3532.2005.12.1.2 MicroPower™ Microprocessor Reset Circuit Marking Part Number (Tape and Reel) 3532 SOP-8 0.375 ± 0.125 45° 0.825 ± 0.445 AAT3532 1 AAT3532IAS-T1 0.235 ± 0.045 7 ...

Page 8

... AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed. Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 8 MicroPower™ Microprocessor Reset Circuit AAT3532 3532.2005.12.1.2 ...

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