Microprocessor Supervisory
Circuit in 4-Lead SC70
ADM6711/ADM6713
FUNCTIONAL BLOCK DIAGRAMS
FEATURES
ADM6711
VREF
MR
RESET
GND
DEBOUNCE
Figure 1.
ADM6713
VCC
RESET
GENERATOR
240ms
VREF
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Automotive systems
RESET
GENERATOR
240ms
03754-011
VCC
MR
RESET
GND
DEBOUNCE
03754-001
Specified over temperature
Low power consumption (12 μA)
Precision monitoring of 2.5 V, 3 V, 3.3 V,
and 5 V power supply voltages
Reset timeout period of 140 ms (minimum)
Manual reset input
Output stages
Push-pull RESET output (ADM6711)
Open-drain RESET output (ADM6713)
Reset assertion down to 1 V VCC
Power supply glitch immunity
4-lead SC70 package
Figure 2.
GENERAL DESCRIPTION
With six different reset threshold options available ranging
from 2.32 V to 4.63 V, the ADM6711/ADM6713 are suitable for
monitoring 2.5 V, 3 V, 3.3 V, and 5 V supplies. A reset timeout
of at least 140 ms occurs when VCC rises above the threshold.
This gives the supply voltage time to stabilize before the
microprocessor starts up.
The ADM6711 has a push-pull output, so no additional
external components are needed. The ADM6713 open-drain
output requires an external pull-up resistor that can be
connected to a voltage higher than VCC, if desired.
The parts are highly reliable with accurate voltage references
and immunity to fast, negative-going transients on VCC. Low
current consumption and space-efficient, 4-lead SC70
packaging make the ADM6711/ADM6713 ideal for use in low
power portable applications.
VCC
MR
VCC
*RPULL-UP
MICROPROCESSOR
SYSTEM
ADM6711/
ADM6713
RESET
RESET
GND
GND
*ADM6713 ONLY
03754-002
The ADM6711/ADM6713 are reset generator circuits suitable
for use in microprocessor-based systems. They provide a reset
signal on power-up, power-down, and whenever the supply
voltage falls below a preset threshold. In addition, both parts
have a debounced manual reset input so that a reset signal can
also be initiated with an external switch or logic signal.
Figure 3. Typical Operating Circuit
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
ADM6711/ADM6713
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................7
Applications....................................................................................... 1
Circuit Description............................................................................8
Functional Block Diagrams............................................................. 1
Manual Reset Input .......................................................................8
General Description ......................................................................... 1
Power Supply Glitch Immunity ...................................................8
Revision History ............................................................................... 2
ADM6713 RESET Output Logic Levels .....................................8
Specifications..................................................................................... 3
Ensuring a Valid RESET Output Down To VCC = 0 V ............8
Absolute Maximum Ratings............................................................ 5
Outline Dimensions ..........................................................................9
ESD Caution.................................................................................. 5
Ordering Guide .............................................................................9
Pin Configuration and Function Descriptions............................. 6
REVISION HISTORY
12/06—Rev. 0 to Rev. A
Updated Format..................................................................Universal
Changes to Specifications Table...................................................... 3
Changes to Figure 10........................................................................ 8
Changes to Ordering Guide ............................................................ 9
8/03—Revision 0: Initial Version
Rev. A | Page 2 of 12
ADM6711/ADM6713
SPECIFICATIONS
VCC = full operating range; TA = TMIN to TMAX; VCC typ = 5 V for L/M models, 3.3 V for T/S models, 3 V for R models, and 2.5 V for Z models,
unless otherwise noted.
Table 1.
Parameter
SUPPLY
VCC Operating Voltage Range
Min
Typ
Max
Unit
Test Conditions/Comments
16
5.5
5.5
35
V
V
μA
12
30
μA
60
μA
60
μA
TA = 0°C to 70°C
TA = −40°C to +125°C
VCC < 5.5 V, ADM671_L/M,
TA = −40°C to +85°C
VCC < 3.6 V, ADM671_R/S/T/Z,
TA = −40°C to +85°C
VCC < 5.5 V, ADM671_L/M,
TA = 85°C to 125°C
VCC < 3.6 V, ADM671_R/S/T/Z,
TA = 85°C to 125°C
4.70
4.75
4.82
4.45
4.50
4.56
3.11
3.15
3.21
2.96
3.00
3.05
2.66
2.70
2.74
2.35
2.38
2.42
TA = 25°C
TA = −40°C to +85°C
TA = 85°C to 125°C
TA = 25°C
TA = −40°C to +85°C
TA = 85°C to 125°C
TA = 25°C
TA = −40°C to +85°C
TA = 85°C to 125°C
TA = 25°C
TA = −40°C to +85°C
TA = 85°C to 125°C
TA = 25°C
TA = −40°C to +85°C
TA = 85°C to 125°C
TA = 25°C
TA = −40°C to +85°C
TA = 85°C to 125°C
30
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/°C
20
μs
VCC = VTH to (VTH − 100 mV)
460
640
ms
ms
TA = −40°C to +85°C
TA = 85°C to 125°C
0.3
V
0.4
V
0.3
0.8 VCC
V
V
0.8 VCC
V
VCC = VTH min, ISINK = 1.2 mA,
ADM671_R/S/T/Z
VCC = VTH min, ISINK = 3.2 mA,
ADM671_L/M
VCC >1.0 V, ISINK = 50 μA
VCC > VTH max, ISOURCE = 500 μA,
ADM6711R/S/T/Z
VCC > VTH max, ISOURCE = 800 μA,
ADM6711L/M
1.0
1.2
Supply Current
RESET VOLTAGE THRESHOLD
ADM671_L
ADM671_M
ADM671_T
ADM671_S
ADM671_R
ADM671_Z
4.56
4.50
4.44
4.31
4.25
4.20
3.04
3.00
2.95
2.89
2.85
2.81
2.59
2.55
2.52
2.28
2.25
2.22
RESET THRESHOLD TEMPERATURE
COEFFICIENT
VCC to RESET DELAY
RESET ACTIVE TIMEOUT PERIOD
140
100
4.63
4.38
3.08
2.93
2.63
2.32
240
RESET OUTPUT VOLTAGE
Low (ADM6711/ADM6713)
High (ADM6711)
Rev. A | Page 3 of 12
ADM6711/ADM6713
Parameter
RESET OPEN-DRAIN OUTPUT
LEAKAGE CURRENT
MANUAL RESET (MR)
Input Threshold
Min
Typ
Max
1
0.3 VCC
0.7 VCC
Pull-Up Resistance
Minimum Pulse width
Glitch Immunity
Reset Delay
10
1
20
100
200
Rev. A | Page 4 of 12
Unit
μA
Test Conditions/Comments
VCC > VTH, RESET deasserted
V
V
kΩ
μs
ns
ns
VIL
VIH
ADM6711/ADM6713
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3. RESET Threshold Options
Table 2.
Model
RESET Threshold (V)
Parameter
VCC
RESET (Push-Pull)
RESET (Open-Drain)
MR
Input Current
VCC, MR
Output Current
RESET
Rate of Rise, VCC
θJA Thermal Impedance, SC70
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
ADM671_L
ADM671_M
ADM671_T
ADM671_S
ADM671_R
ADM671_Z
4.63
4.38
3.08
2.93
2.63
2.32
Rating
−0.3 V to +6 V
−0.3 V to (VCC + 0.3 V)
−0.3 V to +6 V
−0.3 V to (VCC + 0.3 V)
20 mA
ESD CAUTION
20 mA
100 V/μs
146°C/W
−40°C to +125°C
−65°C to +150°C
300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rev. A | Page 5 of 12
ADM6711/ADM6713
GND 1
ADM6711/
ADM6713
4
VCC
3
MR
TOP VIEW
(Not to Scale)
RESET 2
03754-003
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Figure 4. Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
1
2
Mnemonic
GND
RESET
3
MR
4
VCC
Description
Ground Reference for All Signals (0 V).
Active Low Logic Input. RESET remains low while VCC is below the reset threshold and remains low for
240 ms (typical) after VCC rises above the reset threshold.
Manual Reset. This active low debounced input ignores input pulses of 100 ns (typical) and is guaranteed
to accept input pulses greater than 1 μs. Leave floating when not used.
Supply Voltage Being Monitored.
Rev. A | Page 6 of 12
ADM6711/ADM6713
TYPICAL PERFORMANCE CHARACTERISTICS
12
1.007
1.006
IDD @ VCC = 3V
6
4
2
0
–40
–20
0
20
30
50
03754-004
IDD @ VCC = 1V
70
85
100
1.005
1.004
1.003
1.002
1.001
1.000
0.999
0.998
0.997
03754-008
IDD (µA)
8
NORMALIZED RESET THRESHOLD
IDD @ VCC = 5.5V
10
0.996
0.995
–40
120
–20
0
20
Figure 5. Supply Current vs. Temperature
700
600
500
VOD = 20mV
300
200
VOD = 200mV
0
–40
–20
0
03754-005
100 VOD = 125mV
20
30
50
70
85
100
100
120
900
700
600
500
VOD = 20mV
300
200
03754-006
VOD = 125mV
30
50
70
250
200
ADM671_L/M
150
100
ADM671_R/S/T/Z
50
0
10
100
1000
Figure 9. Maximum Transient Duration (Without Causing a RESET Pulse) vs.
RESET Comparator Overdrive
800
20
300
RESET COMPARATOR OVERDRIVE, VTH – VCC (mV)
Figure 6. Power-Down RESET Delay vs. Temperature: ADM671_R/S/T/Z
VOD = 200mV
0
–40
–20
0
350
0
120
TEMPERATURE (°C)
POWER-DOWN RESET DELAY (µs)
85
03754-009
MAXIMUM TRANSIENT DURATION (µs)
POWER-DOWN RESET DELAY (µs)
800
100
70
400
900
400
50
Figure 8. RESET Threshold Deviation vs. Temperature
1000
400
30
TEMPERATURE (°C)
TEMPERATURE (°C)
85
100
120
TEMPERATURE (°C)
Figure 7. Power-Down RESET Delay vs. Temperature: ADM671_L/M
Rev. A | Page 7 of 12
ADM6711/ADM6713
CIRCUIT DESCRIPTION
MANUAL RESET INPUT
The ADM6711/ADM6713 manual reset (MR) input allows the
system operator to reset a system by means of an external
manual switch. Alternatively, a logic signal from another digital
circuit can be used to trigger a reset via the MR input.
The ADM6713 open-drain RESET output is designed for use
with an external pull-up resistor. This resistor can be tied to VCC
or any other reasonable voltage level, offering the flexibility
to use the ADM6713 to drive a variety of different logic level
circuitry.
ENSURING A VALID RESET OUTPUT DOWN TO
VCC = 0 V
When VCC falls below 0.8 V, the ADM6711/ADM6713 RESET
output no longer sinks current, and a high impedance CMOS
logic input connected to RESET may drift to undetermined
logic levels. To eliminate this problem, a pull-down resistor is
connected from RESET to ground. A 100 kΩ resistor is large enough
not to load RESET and small enough to pull RESET to ground.
VCC
The MR input ignores negative-going pulses faster than 100 ns
(typical) and is guaranteed to accept any negative-going input
pulse of a duration greater than or equal to 1 μs. The RESET
output remains low while MR is held low and for 240 ms
(typical) after MR returns high.
VCC
ADM6711
RESET
100kΩ
GND
If MR is connected to long cables or is used in a noisy environment, then placing a 0.1 μF capacitor between the MR input
and ground helps to remove any fast, negative-going transients.
ADM6711
VCC
POWER SUPPLY GLITCH IMMUNITY
The ADM6711/ADM6713 contain internal filtering circuitry
that provides immunity to fast transient glitches on the power
supply line. Figure 9 illustrates glitch immunity performance by
showing the maximum transient duration without causing a reset
pulse for glitches with amplitudes in the range of 1 mV to 1000 mV.
Glitch immunity makes the ADM6711/ADM6713 suitable for
use in noisy environments. Mounting a 0.1 μF decoupling
capacitor as close as possible to the VCC pin improves glitch
immunity further.
Rev. A | Page 8 of 12
RESET
GENERATOR
240ms
VREF
MR
DEBOUNCE
RESET
GND
Figure 10. Ensuring a Valid RESET Output Down to VCC = 0 V
03754-011
When the ADM6711/ADM6713 are powered up, the RESET
output remains low for a period equal to the typical reset active
timeout period. This is designed to give the system time to
power up correctly and for the power supply to stabilize before
any devices are brought out of reset and allowed to begin
executing instructions. Initializing a system in this way provides
a more reliable startup for microprocessor systems.
ADM6713 RESET OUTPUT LOGIC LEVELS
03754-010
The ADM6711/ADM6713 are designed to protect the integrity
of a system’s operation by ensuring the proper operation of the
system during power-up, power-down, and brownout conditions.
ADM6711/ADM6713
OUTLINE DIMENSIONS
2.20
1.80
1.35
1.15
3
4
1
2.40
1.80
2
PIN 1
0.65 BSC
0.50 BSC
1.10
0.80
1.00
0.80
0.10 MAX
0.30
0.15
12°
8°
0.40
0.10
SEATING
*0.70 PLANE
0.50
0.18
0.10
0.30
0.10
0.10 COPLANARITY
*PACKAGE OUTLINE CORRESPONDS IN FULL TO EIAJ SC82
EXCEPT FOR WIDTH OF PIN 2 AS SHOWN.
Figure 11. 4-Lead Thin Shrink Small Outline Transistor Package [SC70]
(EIAJ SC82 body)
(KS-4)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADM6711LAKS-REEL
ADM6711LAKSZ-REEL1
ADM6711LAKS-REEL-7
ADM6711LAKSZ-REEL-71
ADM6711MAKS-REEL
ADM6711MAKS-REEL-7
ADM6711MAKSZ-REEL-71
ADM6711TAKS-REEL
ADM6711TAKSZ-REEL1
ADM6711TAKS-REEL-7
ADM6711TAKSZ-REEL-71
ADM6711SAKS-REEL
ADM6711SAKSZ-REEL1
ADM6711SAKS-REEL-7
ADM6711SAKSZ-REEL-71
ADM6711RAKS-REEL
ADM6711RAKSZ-REEL1
ADM6711RAKS-REEL-7
ADM6711RAKSZ-REEL-71
ADM6711ZAKS-REEL
ADM6711ZAKSZ-REEL1
ADM6711ZAKS-REEL-7
ADM6711ZAKSZ-REEL-71
ADM6713LAKS-REEL
ADM6713LAKSZ-REEL1
ADM6713LAKS-REEL-7
ADM6713LAKSZ-REEL-71
ADM6713MAKS-REEL
ADM6713MAKS-REEL-7
ADM6713MAKSZ-REEL-71
ADM6713TAKS-REEL
RESET
Threshold (V)
4.63
4.63
4.63
4.63
4.38
4.38
4.38
3.08
3.08
3.08
3.08
2.93
2.93
2.93
2.93
2.63
2.63
2.63
2.63
2.32
2.32
2.32
2.32
4.63
4.63
4.63
4.63
4.38
4.38
4.38
3.08
Temperature
Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package
Description
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
Rev. A | Page 9 of 12
Package
Option
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
Ordering
Quantity (k)
10
10
3
3
10
3
3
10
10
3
3
10
10
3
3
10
10
3
3
10
10
3
3
10
10
3
3
10
3
3
10
Branding
M0B
M4U
M0B
M4U
M0C
M0C
M86
M0D
M4A
M0D
M4A
M0E
M4B
M0E
M4B
M0F
M5F
M0F
M5F
M0G
M4H
M0G
M4H
M0H
M87
M0H
M87
M0J
M0J
M88
M0K
ADM6711/ADM6713
Model
ADM6713TAKS-REEL-7
ADM6713TAKSZ-REEL-71
ADM6713SAKS-REEL
ADM6713SAKSZ-REEL1
ADM6713SAKS-REEL-7
ADM6713SAKSZ-REEL-71
ADM6713RAKS-REEL
ADM6713RAKSZ-REEL1
ADM6713RAKS-REEL-7
ADM6713RAKSZ-REEL-71
ADM6713ZAKS-REEL
ADM6713ZAKSZ-REEL1
ADM6713ZAKS-REEL-7
ADM6713ZAKSZ-REEL-71
1
RESET
Threshold (V)
3.08
3.08
2.93
2.93
2.93
2.93
2.63
2.63
2.63
2.63
2.32
2.32
2.32
2.32
Temperature
Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package
Description
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
4-Lead SC70
Z = Pb-free part.
Rev. A | Page 10 of 12
Package
Option
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
KS-4
Ordering
Quantity (k)
3
3
10
10
3
3
10
10
3
3
10
10
3
3
Branding
M0K
M89
M0L
M57
M0L
M57
M0M
M4S
M0M
M4S
M0N
M4R
M0N
M4R
ADM6711/ADM6713
NOTES
Rev. A | Page 11 of 12
ADM6711/ADM6713
NOTES
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C03754-0-12/06(A)
Rev. A | Page 12 of 12
