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Micropower P Reset with Watchdog Timer General Description
The AAT351x PowerManagerTM products are members of AnalogicTechTM's Total Power Management ICTM product family. This family of Microprocessor Reset Circuits provides the ultimate in versatility, allowing system designers full customization of the P monitor and Reset function without any additional components. The AAT351x family offers several combinations of threshold voltage, watchdog timeout period, reset active period and output drive configurations, which are all factory programmed options. All devices are available in 32 reset threshold voltages from 2.6V up to 5V, with three watchdog timeout periods from 6.3ms to 1600ms and three reset timeouts from 1ms up to 140ms. Available output configurations are active low push-pull, active low open drain, active low bi-directional and active high push-pull The AAT351x family is designed to ignore fast negative transients on VDD and to ensure that Reset outputs remain valid down to 1V. The AAT351x family is available in the space saving 5-pin SOT23 surface mount package and is specified over the -40 to +85C temperature range.
AAT3510/1/2/3/4/5/6/7/8/9
PowerManagerTM SmartSwitch TM
Features
* * * * * * *
* *
Tight voltage tolerance: 1.5% Low quiescent current: 5A Guaranteed Reset Valid down to 1V 32 voltage options from 2.6V to 5.0V 3 Reset active period options * 1ms, 20ms, 140ms 3 Watchdog timeout period options * 6.3ms, 102ms, 1600ms 4 output options: * Open drain * Inverting * Non-inverting * Bi-directional Low Tempco: 100ppm/C 5-pin SOT23 package
Applications
* * * * * * * Notebook Computers Portable Electronics Industrial Controllers Intelligent Instruments Critical P and C Supply Monitoring Power-On reset circuits Embedded Control Systems
Typical Application
V DD
V CC RESET (RESET) RESET INPUT
V DD
AAT351x
P
I/O LINE
WDI GND
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Micropower P Reset with Watchdog Timer Pin Descriptions
Pin #
AAT3510 AAT3512 AAT3513 AAT3511 AAT3514 AAT3517 AAT3518 1 N/A 1 AAT3515 AAT3516 AAT3519 1
AAT3510/1/2/3/4/5/6/7/8/9
Symbol
RESET
Function
AAT3510/13/15: RESET output goes low whenever VDD falls below the reset threshold. CMOS push-pull Output AAT3511/14/16: RESET output goes low whenever VDD falls below the reset threshold. Bidirectional CMOS pushpull Output intended to interface directly to microprocessors with bi-directional resets AAT3517/18/19: RESET output goes low whenever VDD falls below the reset threshold. Open drain output. Connect a pull-up resistor to any supply voltage up to 5.5V Ground connection pin RESET active-high output. This CMOS push-pull signal is the logical inverse of RESET. Manual reset input pin. Active low. Pull low to force a reset. Watchdog input pin. Triggers a reset if it remains in a steady state for the duration of the watchdog timer period. Input voltage pin
2
2 1 3 4 5
2 3 N/A 4 5
2 3 4 N/A 5
GND RESET MR WDI VCC
3 4 5
Pin Configuration
5-lead SOT23 (Top View) RESET GND MR
1 5
5-lead SOT23 (Top View) VCC RESET GND
1 5
VCC
2
2
3
4
WDI
RESET
3
4
WDI
AAT3510 AAT3511 AAT3517
AAT3513 AAT3514 AAT3518
5-lead SOT23 (Top View)
RESET GND RESET
1 5
5-lead SOT23 (Top View)
VCC RESET GND
1 5
VCC
2
2
3
4
MR
MR
3
4
WDI
AAT3515 AAT3516 AAT3519
AAT3512
2
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Micropower P Reset with Watchdog Timer Absolute Maximum Ratings
Symbol
VCC VMR, VWDI VRESET IVCC, IMR, IWDI IRESET dVCC/dt TJ (TA=25C unless otherwise noted)
AAT3510/1/2/3/4/5/6/7/8/9
Description
VCC to GND MR, WDI to GND RESET to GND (Push-Pull or Bidirectional Output) RESET to GND (Open Drain Output) Maximum Continuous Input Current RESET/RESET Output Current Rate of rise of VCC Operating Junction Temperature Range (-40 to 150C)
Max
-0.3 to 6 -0.3 to VCC+0.3 -0.3 to VCC+0.3 -0.3 to 6 20 20 100 150
Units
V V V mA mA V/s C
Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time.
Thermal Information
Symbol
JA PD
Description
Maximum Thermal Resistance1 Maximum Power Dissipation1
Value
190 526
Units
C/W mW
Note 1: Mounted on FR4 board
Electrical Characteristics
Typical values are at TA=25C ) Symbol Description
VCC ICC
(VCC = 2.5V to 5.5V, TA = -40 to +85C 1 unless otherwise noted.
Conditions
VCC VCC VCC VCC = = = = 3.6V 5.5V 3.6V 5.5V
Min
1
Typ
5 6
Max
5.5 15 18 15 18 VTHNOM+1.5% VTHNOM+2.5%
Units
V
VTH TC
tRP TRD
Operating Voltage Range TA = -40C to +85C AAT3510/1/2/3/4/7/8: MR & WDI unconnected Supply Current AAT3515/6/9: MR unconnected TA = 25C Reset Threshold Voltage TA = -40 to +85C Reference Voltage -40C < TA < +85C Temp Coeff AAT351xIGV-xx-A-x-T1 Reset Active Timeout AAT351xIGV-xx-B-x-T1 Period AAT351xIGV-xx-C-x-T1 VCC to RESET Delay VCC falling at 1mV/s
A
VTHNOM-1.5% VTH VTHNOM-2.5% VTH 40 1 20 140 1.4 28 200 40
V ppm/C
2 40 280
ms s
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Micropower P Reset with Watchdog Timer Electrical Characteristics
Typical values are at TA=25C ) Symbol Description Conditions Min Typ Max
0.3 0.3 0.3 0.4
AAT3510/1/2/3/4/5/6/7/8/9
(VCC = 2.5V to 5.5V, TA = -40 to +85C1 unless otherwise noted. Units
Push/Pull RESET Output (AAT3510, 3512, 3513, 3514, 3515, 3516, 3518, 3519) VCC 1.0V, ISINK = 50A VCC 1.2V, ISINK = 100A VOL RESET Low Output Voltage VCC 2.7V, ISINK = 1.2mA VCC 4.5V, ISINK = 3.2mA VCC 2.7V, ISOURCE = 500A 0.8 x VCC VOH RESET High Output Voltage VCC 4.5V, ISOURCE = 800A VCC - 1.5 VCC 2.7V, ISINK = 1.2mA RESET Low Output Voltage VCC 4.5V, ISINK = 3.2mA VOH VCC 1.8V, ISOURCE = 150A 0.8 x VCC RESET High Output Voltage VCC 2.7V, ISOURCE = 500A 0.8 x VCC VCC 4.5V, ISOURCE = 800A VCC - 1.5 Bidirectional RESET Output (AAT3511, 3514, 3516) tS Transition Flip-Flop Setup Time2 VCC = 3.0V, CL = 120pF VCC = 5.0V, CL = 200pF tR RESET Output Rise Time3 VCC = 3.0V, CL = 250pF VCC = 5.0V, CL = 400pF VPTH Active Pullup Enable Threshold VCC = 5.0V 0.4 RESET Active Pullup Current VCC = 5.0V RESET Pullup Resistance 4.2 Open-Drain RESET Output (AAT3517, 3518, 3519) VCC 1.0V, ISINK = 50A VCC 1.2V, ISINK = 100A VOL RESET Low Output Voltage VCC 2.7V, ISINK = 1.2mA VCC 4.5V, ISINK = 3.2mA ID(OFF) Reset Leakage Current Watchdog Input (AAT3510, 3511, 3512, 3513, 3514, 3517, 3518) AAT351xIGV-xx-x-A-T1 4.3 tWD Watchdog Timeout Period AAT351xIGV-xx-x-B-T1 71 4 AAT351xIGV-xx-x-C-T1 1.12 tWDI WDI Minimum Pulse Width VIL = 0.3 x VCC, VIH = 0.7 x VCC VIL WDI Input Threshold 5 0.3 x VCC VIH WDI Input Threshold 5 WDI = VCC, time average IWDI WDI Input Current 6 -20 VWDI = 0, time average
V
V 0.3 0.4 V
400 333 333 666 666 0.65 20 4.7
ns ns
5.2 0.3 0.3 0.3 0.4 1.0
V mA k
V A
6.3 102 1.6 50
9.3 153 2.4
ms s ns V A
120 -15
0.8 x VCC 160
4
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Micropower P Reset with Watchdog Timer
Symbol Description Conditions Min
0.3 x VCC 0.7 x VCC 1 35 100 52 230 75
AAT3510/1/2/3/4/5/6/7/8/9
Typ
Max
Units
V s ns k ns
Manual RESET Input (AAT3510, 3511, 3512, 3515, 3516, 3517, 3519) VIL MR Input Threshold VIH MR Input Threshold MR Input Pulse Width MR Glitch Rejection MR Internal Pullup Resistance TA = 25C MR to Reset Delay VCC = 5V
Note 1: Over-temperature limits are guaranteed by design, not production tested. Note 2: This is the minimum time RESET must be held low by an external pulldown source to set the active pullup flip-flop. Note 3: Measured from RESET VOL to (0.8 x VCC), Open Circuit Output. Note 4: Watchdog timeout period C is not available on AAT3513, AAT3514, and AAT3518. Note 5: WDI is internally serviced within the watchdog period if WDI is left unconnected. Note 6: The WDI input current is specified as the average input current when the WDI input is driven high or low. The WDI input is designed for a three-stated-output device with a 10A maximum leakage current and capable of driving a maximum capacitive load of 200pF. The three-state device must be able to source and sink at least 200A when active.
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Micropower P Reset with Watchdog Timer Typical Characteristics
(Unless otherwise noted, VIN = 3V, TA = 25C) Supply Current vs. Temperature
10 9
AAT3510/1/2/3/4/5/6/7/8/9
Vcc Falling To RESET Propagation Delay vs. Temperature
Reset Propagation Delay (s)
160 140 120 100 80 60 40 20 0 -40 -20 0 20 40 60 80 100
Supply Current (A)
8 7 6 5 4 3 2 1 0 -40
Vcc=5V
Vcc falling at 1mV/s V RST -Vcc=100mV
Vcc=3V
Vcc=1V
-20 0 20 40 60 80 100
Temperature (C)
Temperature (C)
Manual Reset to RESET Propagation Delay vs. Temperature
Normalized Timeout Period Propagation Delay (ns)
500 450 400 350 300 250 200 -40 -20 0 20 40 60 80 100
Normalized Reset Timeout Period vs. Temperature
1.05 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 -40
V CC=5V
-20
0
20
40
60
80
100
Temperature (C)
Temperature (C)
Normalized Watchdog Timeout Period vs. Temperature
Normalized Timeout Period
1.05 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 -40
Maximum VCC Transient Duration vs. Reset Threshold Overdrive
Transient Duration (s)
80 70 60 50 40 30 20 10 0 10 100 1000
V RST =2.63V
-20
0
20
40
60
80
100
Temperature (C)
Reset Threshold Overdrive (mV) VRST-VCC
6
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Micropower P Reset with Watchdog Timer Typical Characteristics
(Unless otherwise noted, VIN = 3V, TA = 25C) Bidirectional Pullup Characteristic
+5V
AAT3510/1/2/3/4/5/6/7/8/9
PASSIVE 74HC05 4.7k 4.7k INPUT 100pF PULLUP 2V/div RESET, ACTIVE PULLUP 2V/div RESET, INPUT 5V/div
+5V 74HC05 INPUT 100pF VCC RESET MR GND
200ns/div
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Micropower P Reset with Watchdog Timer Functional Block Diagram
VCC
AAT3510/1/2/3/4/5/6/7/8/9
VCC
Reset Generator
RESET3 RESET4
VREF
MR1 WDI2 Watchdog Timer Detector Watchdog Timer
GND
Note 1: MR pin available on AAT3510/1/2/5/6/7/9 Note 2: WDI pin avaliable on AAT3510/1/2/3/4/7/8 Note 3: RESET pin available on AAT3510/1/3/4/5/6/7/8/9 Note 4: RESET pin available on AAT3512/3/4/5/6/8/9
8
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Micropower P Reset with Watchdog Timer Factory Trimmed Reset Thresholds* and Ordering Information
AAT351x IGV - X.XX-X- X-T1
Watchdog Timeout (if applicable) Reset Active Period Threshold Voltage
AAT3510/1/2/3/4/5/6/7/8/9
Reset Active Period
A: TR(MIN) = 1ms B: TR(MIN) = 20ms C: TR(MIN) = 140ms
Watchdog Timeout Period
A: TWD(NOM) = 6.3ms B: TWD(NOM) = 102ms C: TWD(NOM) = 1600ms*
VDD Threshold Voltage
2.63: 2.70: 2.80: 2.93: 3.00: 3.08: 3.20: 3.30: 3.40: 3.50: 3.60: 3.70: 3.80: VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) = = = = = = = = = = = = = 2.63V 2.7V 2.8V 2.93V 3.0V 3.08V 3.2V 3.3V 3.4V 3.5V 3.6V 3.7V 3.8V 3.90: 4.00: 4.10: 4.20: 4.38: 4.40: 4.50: 4.63: 4.70: 4.80: 4.90: 5.00: VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) VTH(NOM) = = = = = = = = = = = = 3.9V 4.0V 4.1V 4.2V 4.3V 4.38V 4.5V 4.63V 4.7V 4.8V 4.9V 5.0V
* Watchdog timeout period C is not avaliable on AAT3513, AAT3514 and AAT3518.
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Micropower P Reset with Watchdog Timer Ordering Information
Package SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 Marking1 HVXYY HUXYY HGXYY HHXYY EWXYY MYXYY JOXYY HFXYY HEXYY HIXYY KLXYY JNXYY KMXYY MFXYY INXYY LZXYY IQXYY Part Number (Tape and Reel) AAT3510IGV-2.63-C-C-T1 AAT3510IGV-2.93-C-C-T1 AAT3510IGV-3.08-C-C-T1 AAT3510IGV-4.38-C-C-T1 AAT3511IGV-2.63-C-C-T1 AAT3512IGV-2.63-A-C-T1 AAT3512IGV-2.63-C-C-T1 AAT3513IGV-2.63-C-C-T1 AAT3515IGV-2.63-C-T1 AAT3515IGV-2.93-B-T1 AAT3515IGV-2.93-C-T1 AAT3515IGV-3.08-C-T1 AAT3515IGV-4.38-C-T1 AAT3515IGV-4.63-C-T1 AAT3517IGV-2.63-C-C-T1 AAT3517IGV-2.8-B-C-T1 AAT3517IGV-2.93-C-C-T1
AAT3510/1/2/3/4/5/6/7/8/9
Note: Sample stock is held on part numbers listed in bold. Note 1: XYY = date and assembly code.
10
3510.2004.08.1.4
Micropower P Reset with Watchdog Timer Package Information
SOT23-5
2.85 0.15 1.90 BSC 0.95 BSC
AAT3510/1/2/3/4/5/6/7/8/9
1.575 0.125
1.10 0.20
0.60 REF
2.80 0.20
1.20 0.25
0.15 0.07 4 4
GAUGE PLANE
10 5
0.40 0.10
0.075 0.075
0.60 REF
0.45 0.15
0.10 BSC
All dimensions in millimeters.
3510.2004.08.1.4
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Micropower P Reset with Watchdog Timer
AAT3510/1/2/3/4/5/6/7/8/9
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech's standard warranty. Testing and other quality control techniques are utilized to the extent 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 12
3510.2004.08.1.4
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