ANALOG DEVICES ADM6711 Service Manual
Microprocessor Supervisory
V
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FEATURES
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
Open-drain
Reset assertion down to 1 V V
Power supply glitch immunity
4-lead SC70 package
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Automotive systems
GENERAL DESCRIPTION
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.
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 V
This gives the supply voltage time to stabilize before the
microprocessor starts up.
The ADM6711 has a push-pull output, so no additional
ernal components are needed. The ADM6713 open-drain
ext
output requires an external pull-up resistor that can be
connected to a voltage higher than V
output (ADM6711)
RESET
output (ADM6713)
RESET
CC
rises above the threshold.
CC
, if desired.
CC
Circuit in 4-Lead SC70
ADM6711/ADM6713
FUNCTIONAL BLOCK DIAGRAMS
ADM6711
CC
V
REF
MR
V
CC
MR
ADM6713
V
REF
DEBOUNCE
DEBOUNCE
The parts are highly reliable with accurate voltage references
a
nd immunity to fast, negative-going transients on V
current consumption and space-efficient, 4-lead SC70
packaging make the ADM6711/ADM6713 ideal for use in low
power portable applications.
V
CC
ADM6711/
ADM6713
RESET RESETMR
GND GND
Figure 3. Typical Operating Circuit
RESET
GENERATOR
240ms
Figure 1.
RESET
GENERATOR
240ms
Figure 2.
*R
PULL-UP
*ADM6713 ON LY
CC
V
MICROPROCESSOR
CC
SYSTEM
RESET
GND
RESET
GND
. Low
03754-002
3754-011
03754-001
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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
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TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagrams............................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
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
Typical Perf or m an c e Charac t e r istics ..............................................7
Circuit Description............................................................................8
Manual Reset Input .......................................................................8
Power Supply Glitch Immunity ...................................................8
ADM6713
Ensuring a Valid
Outline Dimensions ..........................................................................9
Ordering Guide .............................................................................9
Output Logic Levels.....................................8
RESET
Output Down To V
RESET
CC
= 0 V ............8
Rev. A | Page 2 of 12
ADM6711/ADM6713
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SPECIFICATIONS
VCC = full operating range; TA = T
unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
SUPPLY
VCC Operating Voltage Range 1.0 5.5 V TA = 0°C to 70°C
1.2 5.5 V TA = −40°C to +125°C
Supply Current 16 35 A VCC < 5.5 V, ADM671_L/M,
T
12 30 A VCC < 3.6 V, ADM671_R/S/T/Z,
T
60 A VCC < 5.5 V, ADM671_L/M,
T
60 A VCC < 3.6 V, ADM671_R/S/T/Z,
T
RESET VOLTAGE THRESHOLD
ADM671_L 4.56 4.63 4.70 V TA = 25°C
4.50 4.75 V TA = −40°C to +85°C
4.44 4.82 V TA = 85°C to 125°C
ADM671_M 4.31 4.38 4.45 V TA = 25°C
4.25 4.50 V TA = −40°C to +85°C
4.20 4.56 V TA = 85°C to 125°C
ADM671_T 3.04 3.08 3.11 V TA = 25°C
3.00 3.15 V TA = −40°C to +85°C
2.95 3.21 V TA = 85°C to 125°C
ADM671_S 2.89 2.93 2.96 V TA = 25°C
2.85 3.00 V TA = −40°C to +85°C
2.81 3.05 V TA = 85°C to 125°C
ADM671_R 2.59 2.63 2.66 V TA = 25°C
2.55 2.70 V TA = −40°C to +85°C
2.52 2.74 V TA = 85°C to 125°C
ADM671_Z 2.28 2.32 2.35 V TA = 25°C
2.25 2.38 V TA = −40°C to +85°C
2.22 2.42 V TA = 85°C to 125°C
RESET THRESHOLD TEMPERATURE
COEFFICIENT
VCC to RESET DELAY
RESET ACTIVE TIMEOUT PERIOD
100 640 ms TA = 85°C to 125°C
RESET OUTPUT VOLTAGE
Low (ADM6711/ADM6713) 0.3 V VCC = VTH min, I
ADM671_R/S/T/Z
0.4 V VCC = VTH min, I
ADM671_L/M
0.3 V VCC >1.0 V, I
High (ADM6711) 0.8 V
ADM6711R/S/T/Z
0.8 V
ADM6711L/M
to T
MIN
; 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,
MAX
30 ppm/°C
20 s V
140 240 460 ms T
CC
CC
V VCC > VTH max, I
V VCC > VTH max, I
= −40°C to +85°C
A
= −40°C to +85°C
A
= 85°C to 125°C
A
= 85°C to 125°C
A
= VTH to (VTH − 100 mV)
CC
= −40°C to +85°C
A
= 1.2 mA,
SINK
= 3.2 mA,
SINK
= 50 A
SINK
SOURCE
SOURCE
= 500 A,
= 800 A,
Rev. A | Page 3 of 12
ADM6711/ADM6713
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Parameter Min Typ Max Unit Test Conditions/Comments
RESET OPEN-DRAIN OUTPUT
LEAKAGE CURRENT
MANUAL RESET (MR)
Input Threshold 0.3 V
0.7 V
Pull-Up Resistance 10 20 kΩ
Minimum Pulse width 1 µs
Glitch Immunity 100 ns
Reset Delay 200 ns
1 µA
CC
V V
CC
V VIH
> VTH, RESET deasserted
V
CC
IL
Rev. A | Page 4 of 12
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