Analogic AAT3510 Micropower î¼p reset with watchdog timer Datasheet

AAT3510/1/2/3/4/5/6/7/8/9
Micropower µP Reset with Watchdog Timer
PowerManager
SmartSwitch™™
General Description
Features
The AAT351x PowerManager products are members of AnalogicTech's Total Power Management
IC™ (TPMIC™) product family. This family of
microprocessor reset circuits provides the ultimate
in versatility, allowing system designers full customization of the µP 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.
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The AAT351x family is designed to ignore fast negative transients on VDD and to ensure that reset
outputs remain valid down to 1V.
Applications
The AAT351x family is available in the Pb-free,
space-saving 5-pin SOT23 surface mount package
and is specified over the -40 to +85°C temperature
range.
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•
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Tight Voltage Tolerance: ±1.5%
Low Quiescent Current: 5µA
Guaranteed Reset Valid Down to 1V
32 Voltage Options from 2.6V to 5.0V
Three Reset Active Period Options:
— 1ms, 20ms, 140ms
Three Watchdog Timeout Period Options:
— 6.3ms, 102ms, 1600ms
Four Output Options:
— Open Drain
— Inverting
— Non-Inverting
— Bi-Directional
Low Temperature Coefficient: 100ppm/°C
5-Pin SOT23 Package
Critical µP and µC Supply Monitoring
Embedded Control Systems
Industrial Controllers
Intelligent Instruments
Notebook Computers
Portable Electronics
Power-On Reset Circuits
Typical Application
V DD
VDD
VCC
AAT351x
RESET
(RESET)
WDI
RESET
INPUT
µP
I/O LINE
GND
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Micropower µP Reset with Watchdog Timer
Pin Descriptions
Pin #
AAT3510 AAT3512 AAT3513
AAT3511
AAT3514
AAT3517
AAT3518
AAT3515
AAT3516
AAT3519
Symbol
1
N/A
1
1
RESET
2
N/A
2
1
2
3
2
3
GND
RESET
3
4
3
4
N/A
4
4
N/A
MR
WDI
5
5
5
5
VCC
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.
Pin Configuration
5-lead SOT23
(Top View)
5-lead SOT23
(Top View)
RESET
1
GND
2
MR
3
5
4
WDI
RESET
1
GND
2
MR
3
5
VCC
4
WDI
AAT3510
AAT3511
AAT3517
AAT3512
5-lead SOT23
(Top View)
5-lead SOT23
(Top View)
RESET
1
GND
2
RESET
3
5
4
AAT3513
AAT3514
AAT3518
2
VCC
VCC
WDI
RESET
1
GND
2
RESET
3
5
VCC
4
MR
AAT3515
AAT3516
AAT3519
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Micropower µP Reset with Watchdog Timer
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol
Description
VCC
VMR, VWDI
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°C to +150°C)
VRESET
IVCC, IMR, IWDI
IRESET
dVCC/dt
TJ
Max
Units
-0.3 to 6
-0.3 to VCC + 0.3
-0.3 to VCC + 0.3
-0.3 to 6
20
20
100
150
V
V
mA
mA
V/µs
°C
Value
Units
190
526
°C/W
mW
V
Thermal Information2
Symbol
ΘJA
PD
Description
Maximum Thermal Resistance
Maximum Power Dissipation
1. 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.
2. Mounted on an FR4 board.
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Micropower µP Reset with Watchdog Timer
Electrical Characteristics
VCC = 2.5V to 5.5V, TA = -40°C to +85°C1, unless otherwise noted. Typical values are at TA = 25°C.
Symbol Description
VCC
Operating Voltage Range
ICC
Supply Current
VTH
Reset Threshold Voltage
TC
Reference Voltage
Temperature Coefficient
tRP
Reset Active Timeout
Period
TRD
VCC to RESET Delay
Conditions
TA = -40°C to +85°C
AAT3510/1/2/3/4/7/8:
MR & WDI Unconnected
AAT3515/6/9:
MR Unconnected
TA = 25°C
TA = -40 to +85°C
Min
Typ
1
VCC = 3.6V
VCC = 5.5V
VCC = 3.6V
VCC = 5.5V
5
6
VTHNOM-1.5% VTH
VTHNOM-2.5% VTH
-40°C < TA < +85°C
AAT351xIGV-xx-A-x-T1
AAT351xIGV-xx-B-x-T1
AAT351xIGV-xx-C-x-T1
VCC Falling at 1mV/µs
Max
Units
5.5
15
18
15
18
VTHNOM+1.5%
VTHNOM+2.5%
V
±40
1
20
140
1.4
28
200
40
µA
V
ppm/°C
2
40
280
ms
µs
Push/Pull RESET Output (AAT3510, 3512, 3513, 3514, 3515, 3516, 3518, 3519)
VOL
RESET Low Output Voltage
VOH
RESET High Output Voltage
RESET Low Output Voltage
VOH
RESET High Output Voltage
VCC ≥ 1.0V, ISINK = 50µA
VCC ≥ 1.2V, ISINK = 100µA
VCC ≥ 2.7V, ISINK = 1.2mA
VCC ≥ 4.5V, ISINK = 3.2mA
VCC ≥ 2.7V, ISOURCE = 500µA
VCC ≥ 4.5V, ISOURCE = 800µA
VCC ≥ 2.7V, ISINK = 1.2mA
VCC ≥ 4.5V, ISINK = 3.2mA
VCC ≥ 1.8V, ISOURCE = 150µA
VCC ≥ 2.7V, ISOURCE = 500µA
VCC ≥ 4.5V, ISOURCE = 800µA
0.3
0.3
0.3
0.4
0.8 x VCC
VCC - 1.5
V
V
0.3
0.4
0.8 x VCC
0.8 x VCC
VCC - 1.5
V
Bidirectional RESET Output (AAT3511, 3514, 3516)
tS
tR
VPTH
Transition Flip-Flop Setup
Time2
RESET Output Rise Time3
400
VCC = 3.0V, CL = 120pF
VCC = 5.0V, CL = 200pF
VCC = 3.0V, CL = 250pF
VCC = 5.0V, CL = 400pF
Active Pull-Up Enable
VCC = 5.0V
Threshold
RESET Active Pull-Up
VCC = 5.0V
Current
RESET Pull-Up Resistance
ns
333
333
666
666
0.4
4.2
ns
0.65
V
20
mA
4.7
5.2
kΩ
1. Over-temperature limits are guaranteed by design, not production tested.
2. This is the minimum time RESET must be held low by an external pull-down source to set the active pull-up flip-flop.
3. Measured from RESET VOL to (0.8 x VCC), open circuit output.
4
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Micropower µP Reset with Watchdog Timer
Electrical Characteristics
VCC = 2.5V to 5.5V, TA = -40°C to +85ºC1, unless otherwise noted. Typical values are at TA = 25°C.
Symbol
Description
Conditions
Min
Typ
Max
Units
Open-Drain RESET Output (AAT3517, 3518, 3519)
VOL
ID(OFF)
RESET Low Output Voltage
VCC
VCC
VCC
VCC
≥
≥
≥
≥
1.0V,
1.2V,
2.7V,
4.5V,
ISINK
ISINK
ISINK
ISINK
=
=
=
=
50µA
100µA
1.2mA
3.2mA
0.3
0.3
0.3
0.4
1.0
Reset Leakage Current
V
µA
Watchdog Input (AAT3510, 3511, 3512, 3513, 3514, 3517, 3518)
tWD
Watchdog Timeout Period
tWDI
VIL
VIH
WDI Minimum Pulse Width
WDI Input Threshold3
WDI Input Threshold3
IWDI
WDI Input Current4
AAT351xIGV-xx-x-A-T1
AAT351xIGV-xx-x-B-T1
AAT351xIGV-xx-x-C-T12
VIL = 0.3 x VCC, VIH = 0.7 x VCC
4.3
71
1.12
6.3
102
1.6
50
9.3
153
2.4
ms
s
ns
0.3 x VCC
WDI = VCC, Time Average
VWDI = 0, Time Average
-20
120
-15
0.8 x VCC
160
V
µA
Manual RESET Input (AAT3510, 3511, 3512, 3515, 3516, 3517, 3519)
VIL
VIH
MR
MR
MR
MR
MR
MR
Input Threshold
Input Threshold
Input Pulse Width
Glitch Rejection
Internal Pull-Up Resistance
to Reset Delay
0.3 x VCC
0.7 x VCC
1
TA = 25°C
VCC = 5V
35
100
52
230
75
V
µs
ns
kΩ
ns
1. Over-temperature limits are guaranteed by design, not production tested.
2. Watchdog timeout period C is not available on AAT3513, AAT3514, and AAT3518.
3. WDI is internally serviced within the watchdog period if WDI is left unconnected.
4. 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 10µA 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 200µA when active.
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Micropower µP Reset with Watchdog Timer
Typical Characteristics
Unless otherwise noted, VIN = 3V, TA = 25°C.
Supply Current vs. Temperature
VCC Falling to RESET Propagation
Delay vs. Temperature
Supply Current (µA)
9
Propagation Delay (µs)
10
VCC = 5V
8
7
6
VCC = 3V
5
4
3
2
VCC = 1V
1
0
-40
-20
0
20
40
60
80
100
160
140
VCC Falling at 1mV/µs
V RST - VCC = 100mV
120
100
80
60
40
20
0
-40
-20
Temperature (°C)
V CC = 5V
400
350
300
250
200
-20
0
20
40
60
80
100
0.99
0.98
0.97
0.96
0.95
-40
20
40
Temperature (°C)
6
100
-20
0
20
40
60
80
100
Maximum VCC Transient Duration vs.
Reset Threshold Overdrive
Transient Duration (µs)
Normalized Timeout Period
0
80
Temperature (°C)
Normalized Watchdog Timeout Period
vs. Temperature
-20
60
1.05
1.04
1.03
1.02
1.01
1.00
Temperature (°C)
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
-40
40
Normalized Reset Timeout Period
vs. Temperature
Normalized Timeout Period
Propagation Delay (ns)
500
-40
20
Temperature (°C)
Manual Reset to RESET Propagation
Delay vs. Temperature
450
0
60
80
100
80
70
60
50
40
V RST = 2.63V
30
20
10
0
10
100
1000
Reset Threshold Overdrive (mV) VRST - VCC
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Micropower µP Reset with Watchdog Timer
Typical Characteristics
Unless otherwise noted, VIN = 3V, TA = 25°C.
Bidirectional Pullup Characteristic
+5V
PASSIVE
4.7kΩ
PULLUP
2V/div
74HC05
INPUT
RESET,
ACTIVE
PULLUP
2V/div
4.7k
100pF
+5V
74HC05
RESET
INPUT
100pF
RESET,
INPUT
5V/div
VCC
MR GND
Time (200ns/div)
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Micropower µP Reset with Watchdog Timer
Functional Block Diagram
VCC
Reset
Generator
VCC
RESET3
RESET4
VREF
MR1
WDI2
Watchdog
Timer
Detector
Watchdog
Timer
GND
1.
2.
3.
4.
8
MR pin available on AAT3510/1/2/5/6/7/9.
WDI pin avaliable on AAT3510/1/2/3/4/7/8.
RESET pin available on AAT3510/1/3/4/5/6/7/8/9.
RESET pin available on AAT3512/3/4/5/6/8/9.
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Micropower µP Reset with Watchdog Timer
Factory-Trimmed Reset Thresholds1 and Ordering Information
AAT351x IGV - X.XX-X- X-T1
Watchdog Timeout (if applicable)
Reset Active Period
Threshold Voltage
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) = 1600ms1
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
1. Watchdog timeout period C is not available on AAT3513, AAT3514, and AAT3518.
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Micropower µP Reset with Watchdog Timer
Ordering Information
Package
Marking1
Part Number (Tape and Reel)2
SOT23-5
HVXYY
AAT3510IGV-2.63-C-C-T1
SOT23-5
HUXYY
AAT3510IGV-2.93-C-C-T1
SOT23-5
HGXYY
AAT3510IGV-3.08-C-C-T1
SOT23-5
HHXYY
AAT3510IGV-4.38-C-C-T1
SOT23-5
EWXYY
AAT3511IGV-2.63-C-C-T1
SOT23-5
MYXYY
AAT3512IGV-2.63-A-C-T1
SOT23-5
AAT3512IGV-2.63-C-C-T1
SOT23-5
HEXYY
AAT3515IGV-2.63-C-T1
SOT23-5
HIXYY
AAT3515IGV-2.93-B-T1
SOT23-5
KLXYY
AAT3515IGV-2.93-C-T1
SOT23-5
JNXYY
AAT3515IGV-3.08-C-T1
SOT23-5
KMXYY
AAT3515IGV-4.38-C-T1
SOT23-5
MFXYY
AAT3515IGV-4.63-C-T1
SOT23-5
INXYY
AAT3517IGV-2.63-C-C-T1
SOT23-5
LZXYY
AAT3517IGV-2.8-B-C-T1
SOT23-5
IQXYY
AAT3517IGV-2.93-C-C-T1
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means
semiconductor products that are in compliance with current RoHS standards, including
the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more
information, please visit our website at http://www.analogictech.com/pbfree.
1. XYY = date and assembly code.
2. Sample stock is generally held on part numbers listed in BOLD.
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Micropower µP Reset with Watchdog Timer
Package Information
SOT23-5
2.85 ± 0.15
1.90 BSC
0.40 ± 0.10
0.075 ± 0.075
0.15 ± 0.07
4° ± 4°
10° ± 5°
1.10 ± 0.20
0.60 REF
1.20 ± 0.25
2.80 ± 0.20
1.575 ± 0.125
0.95
BSC
0.60 REF
0.45 ± 0.15
GAUGE PLANE
0.10 BSC
All dimensions in millimeters.
© Advanced Analogic Technologies, Inc.
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.
Customers are advised 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
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830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
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