Microprocessor Supervisory Circuits
in 3-Lead SC70 and SOT-23
ADM803/ADM809/ADM810
FEATURES
Specified over Temperature
Low Power Consumption (17
½A)
Precision Voltage Monitor: 2.5 V, 3 V, 3.3 V, 5 V Options
Reset Assertion Down to 1 V V
CC
140 ms Min Power-On Reset
Open-Drain
RESET
Output (ADM803)
Push-Pull
RESET
Output (ADM809)
Push-Pull RESET Output (ADM810)
SC70 and SOT-23 Packages
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
FUNCTIONAL BLOCK DIAGRAM
ADM803
V
CC
V
REF
RESET
GENERATOR
240ms
RESET
GND
ADM809 /ADM810
V
CC
V
REF
RESET
GENERATOR
240ms
RESET
(RESET)
GENERAL DESCRIPTION
GND
The ADM803/ADM809/ADM810 supervisory circuits monitor
the power supply voltage in microprocessor systems. They pro
vide a reset output during power-up, power-down, and brownout
conditions. On power-up, an internal timer holds reset asserted
for 240 ms. This holds the microprocessor in a reset state until
conditions have stabilized. The
RESET
output remains opera
tional with V
CC
as low as 1 V. The ADM803 and ADM809
provide an active low reset signal (RESET), while the ADM810
provides an active high signal (RESET) output. The ADM809
and ADM810 have push-pull outputs, whereas the ADM803 has
an open-drain output, which requires an external pull-up resistor.
Seven reset threshold voltage options are available, suitable for
monitoring a variety of supply voltages. Refer to Table I.
The reset comparator features built-in glitch immunity, making
it immune to fast transients on V
CC
.
The ADM803/ADM809/ADM810 consume only 17
mA,
making them suitable for low power, portable equipment.
The ADM803 is available in a 3-lead SC70; the ADM809/
ADM810 is available in 3-lead SOT-23 and SC70 packages.
V
CC
V
CC
V
CC
MICROPROCESSOR
SYSTEM
RESET
INPUT
GND
*ADM803
ONLY
*R
PULL-UP
ADM803 /ADM809
RESET
GND
Figure 1. Typical Operating Circuit
REV. F
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. 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
© 2005 Analog Devices, Inc. All rights reserved.
ADM803/ADM809/ADM810–SPECIFICATIONS
(Votherwiseoperating range, T = T
= full
noted.)
V Typ = 5 V for L/M/J models, 3.3 V for T/S models, 3 V for R models, 2.5 V for Z models, unless
CC
A
CC
MIN
to T
MAX
,
Parameter
V
CC
OPERATING VOLTAGE RANGE
Supply Current
Min
1.0
1.2
Typ
Max
5.5
5.5
35
30
60
60
Unit
V
V
mA
mA
mA
mA
Test Conditions/Comments
T
A
= 0∞C to 70∞C
T
A
= –40∞C to +125∞C
V
CC
< 5.5 V, ADM8_L/M/J,
T
A
= –40∞C to +85∞C
V
CC
< 3.6 V, ADM8_R/S/T/Z,
T
A
= –40∞C to +85∞C
V
CC
< 5.5 V, ADM8_L/M/J,
T
A
= 85∞C to 125∞C
V
CC
< 3.6 V, ADM8_R/S/T/Z,
T
A
= 85∞C to 125∞C
24
17
RESET THRESHOLD
Reset Voltage Threshold
ADM8_L
ADM8_L
ADM8_L
ADM8_M
ADM8_M
ADM8_M
ADM8_J*
ADM8_J*
ADM8_J*
ADM8_T
ADM8_T
ADM8_T
ADM8_S
ADM8_S
ADM8_S
ADM8_R
ADM8_R
ADM8_R
ADM8_Z
ADM8_Z
ADM8_Z
RESET THRESHOLD TEMPERATURE
COEFFICIENT
V
CC
to Reset Delay
RESET ACTIVE TIMEOUT PERIOD
RESET
OUTPUT VOLTAGE LOW
(ADM803/ADM809)
4.56
4.50
4.44
4.31
4.25
4.20
3.93
3.89
3.80
3.04
3.00
2.95
2.89
2.85
2.81
2.59
2.55
2.52
2.28
2.25
2.22
4.63
4.38
4.00
3.08
2.93
2.63
2.32
4.70
4.75
4.82
4.45
4.50
4.56
4.06
4.10
4.20
3.11
3.15
3.21
2.96
3.00
3.05
2.66
2.70
2.74
2.35
2.38
2.42
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/∞C
ms
T
A
= 25∞C
T
A
= –40∞C to +85∞C
T
A
= –40∞C to +125∞C
T
A
= 25∞C
T
A
= –40∞C to +85∞C
T
A
= –40∞C to +125∞C
T
A
= 25∞C
T
A
= –40∞C to +85∞C
T
A
= –40∞C to +125∞C
T
A
= 25∞C
T
A
= –40∞C to +85∞C
T
A
= –40∞C to +125∞C
T
A
= 25∞C
T
A
= –40∞C to +85∞C
T
A
= –40∞C to +125∞C
T
A
= 25∞C
T
A
= –40∞C to +85∞C
T
A
= –40∞C to +125∞C
T
A
= 25∞C
T
A
= –40∞C to +85∞C
T
A
= –40∞C to +125∞C
30
20
140
100
240
460
840
0.3
0.4
0.3
V
CC
= V
TH
to (V
TH
– 100 mV)
T
A
= –40∞C to +85∞C
T
A
= 85∞C to 125∞C
V
CC
= V
TH
min, I
SINK
= 1.2 mA,
ADM803R/S/T/Z, ADM809R/S/T/Z
V
CC
= V
TH
min, I
SINK
= 3.2 mA,
ADM803L/M/J, ADM809L/M/J
V
CC
>1.0 V, I
SINK
= 50
mA
V
CC
> V
TH
max, I
SOURCE
= 500
mA,
ADM809R/S/T/Z
V
CC
> V
TH
max, I
SOURCE
= 800
mA,
ADM809L/M/J
V
CC
= V
TH
min, I
SINK
= 1.2 mA,
ADM810R/S/T/Z
V
CC
= V
TH
min, I
SINK
= 3.2 mA,
ADM810L/M/J
1.8 V < V
CC
< V
TH
min,
I
SOURCE
= 150
mA
V
CC
> V
TH
, reset de-asserted
ms
ms
V
V
V
V
V
RESET
OUTPUT VOLTAGE HIGH
(ADM809)
0.8 V
CC
V
CC
– 1.5
RESET OUTPUT VOLTAGE LOW
(ADM810)
0.3
0.4
V
V
RESET OUTPUT VOLTAGE HIGH
(ADM810)
RESET
OPEN-DRAIN OUTPUT
Leakage Current (ADM803)
*ADM809/ADM810
only.
0.8 V
CC
V
1
mA
–2–
REV. F
ADM803/ADM809/ADM810
ABSOLUTE MAXIMUM RATINGS*
(T
A
= 25∞C, unless otherwise noted.)
PIN CONFIGURATION
GND 1
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
RESET,
RESET
. . . . . . . . . . . . . . . . . . –0.3 V to V
CC
+ 0.5 V
Input Current
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Output Current
RESET,
RESET
(push-pull) . . . . . . . . . . . . . . . . . . . 20 mA
RESET
(open drain) . . . . . . . . . . . . . . . . . –0.3 V to +6.0 V
Rate of Rise, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 V/ms
½
JA
Thermal Impedance, SC70 . . . . . . . . . . . . . . . . . 146∞C/W
½
JA
Thermal Impedance, SOT-23 . . . . . . . . . . . . . . . 270∞C/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300∞C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215∞C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220∞C
Storage Temperature Range . . . . . . . . . . . . –65∞C to +150∞C
*Stresses
above those listed under Absolute Maximum Ratings may cause perma
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum ratings
for extended periods of time may affect device reliability.
ADM803/
ADM809/
ADM810
TOP VIEW
(Not to Scale)
3 V
CC
RESET,
RESET
2
PIN FUNCTION DESCRIPTIONS
Pin No. Mnemonic
1
2
GND
Function
0 V. Ground reference for all
signals.
RESET
(ADM803/ Active Low Logic Output.
ADM809)
RESET
remains low while V
CC
is below the reset threshold and
remains low for 240 ms (typ)
after V
CC
rises above the reset
threshold.
RESET (ADM810) Active High Logic Output.
RESET remains high while V
CC
is below the reset threshold and
remains high for 240 ms (typ)
after V
CC
rises above the reset
threshold.
V
CC
Supply Voltage Being
Monitored.
Table I. Reset Threshold Options
2
RESET Model
ADM8_L
ADM8_M
ADM8_J*
ADM8_T
ADM8_S
ADM8_R
ADM8_Z
*ADM809/ADM810
only.
Threshold (V)
4.63
4.38
4.00
3.08
2.93
2.63
2.32
3
V
CC
RESET
V
REF
V
REF
V
REF
V
REF
t
1
t
1 =
RESET
TIME = 240ms TYP
V
REF
= RESET VOLTAGE THRESHOLD
t
1
Figure 2. Power Fail Reset Timing
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
ADM803/ADM809/ADM810 feature proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions
are recommended to avoid performance degradation or loss of functionality.
REV. F
–3–
ADM803/ADM809/ADM810
ORDERING GUIDE
Model
ADM803LAKS-REEL
ADM803LAKS-REEL7
ADM803LAKSZ-REEL
1
ADM803LAKSZ-REEL7
1
ADM803MAKS-REEL
ADM803MAKS-REEL7
ADM803MAKSZ-REEL
1
ADM803MAKSZ-REEL7
1
ADM803RAKS-REEL
ADM803RAKS-REEL7
ADM803RAKSZ-REEL
1
ADM803RAKSZ-REEL7
1
ADM803SAKS-REEL
ADM803SAKS-REEL7
ADM803SAKSZ-REEL
1
ADM803SAKSZ-REEL7
1
ADM803TAKS-REEL
ADM803TAKS-REEL7
ADM803TAKSZ-REEL
1
ADM803TAKSZ-REEL7
1
ADM803ZAKS-REEL
ADM803ZAKS-REEL7
ADM803ZAKSZ-REEL
1
ADM803ZAKSZ-REEL7
1
ADM809-5LAKSZ-REEL
1
ADM809-5LAKSZ-REEL-RL7
1
ADM809-5LARTZ-REEL
1
ADM809-5LARTZ-REEL-RL7
1
ADM809-5SAKSZ-REEL
1
ADM809-5SAKSZ-REEL-RL7
1
ADM809-5SARTZ-REEL
1
ADM809-5SARTZ-REEL-RL7
1
ADM809JAKS-REEL
ADM809JAKS-REEL7
ADM809JAKSZ-REEL
1
ADM809JAKSZ-REEL7
1
ADM809JART-REEL
ADM809JART-REEL7
ADM809JARTZ-REEL
1
ADM809JARTZ-REEL7
1
ADM809LAKS-REEL
ADM809LAKS-REEL7
ADM809LAKSZ-REEL
1
ADM809LAKSZ-REEL7
1
ADM809LART-REEL
ADM809LART-REEL7
ADM809LARTZ-REEL
1
ADM809LARTZ-REEL7
1
ADM809MAKS-REEL
ADM809MAKS-REEL7
ADM809MAKSZ-REEL
1
ADM809MAKSZ-REEL7
1
ADM809MART-REEL
ADM809MART-REEL7
ADM809MARTZ-REEL
1
ADM809MARTZ-REEL7
1
ADM809RAKS-REEL
ADM809RAKS-REEL7
Threshold Reset (V)
4.63
4.63
4.63
4.63
4.38
4.38
4.38
4.38
2.63
2.63
2.63
2.63
2.93
2.93
2.93
2.93
3.08
3.08
3.08
3.08
2.32
2.32
2.32
2.32
2.63
2.63
2.63
2.63
2.63
2.63
2.63
2.63
4.00
4.00
4.00
4.00
4.00
4.00
4.00
4.00
4.63
4.63
4.63
4.63
4.63
4.63
4.63
4.63
4.38
4.38
4.38
4.38
4.38
4.38
4.38
4.38
2.63
2.63
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
–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
–4–
Branding
M02
M02
M6L
M6L
M03
M03
M6J
M6J
M07
M07
M6M
M6M
M06
M06
M50
M50
M05
M05
M4M
M4M
M08
M08
M6N
M6N
M6Q
M6Q
M6Q
M6Q
M4C
M4C
M4C
M4C
M9C
M9C
M6P
M6P
9JXX
9JXX
M6P
M6P
M9A
M9A
M6R
M6R
9LXX
9LXX
M6R
M6R
M9B
M9B
M51
M51
9MXX
9MXX
M51
M51
M9F
M9F
Quantity
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
Package Type
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
REV. F
ADM803/ADM809/ADM810
ORDERING GUIDE
Model
ADM809RAKSZ-REEL
1
ADM809RAKSZ-REEL7
1
ADM809RART-REEL
ADM809RART-REEL7
ADM809RARTZ-REEL
1
ADM809RARTZ-REEL7
1
ADM809SAKS-REEL
ADM809SAKS-REEL7
ADM809SAKSZ-REEL
1
ADM809SAKSZ-REEL7
1
ADM809SART-REEL
ADM809SART-REEL7
ADM809SARTZ-REEL
1
ADM809SARTZ-REEL7
1
ADM809TAKS-REEL
ADM809TAKS-REEL7
ADM809TAKSZ-REEL
1
ADM809TAKSZ-REEL7
1
ADM809TART-REEL
ADM809TART-REEL7
ADM809TARTZ-REEL
1
ADM809TARTZ-REEL7
1
ADM809ZAKS-REEL
ADM809ZAKS-REEL7
ADM809ZAKSZ-REEL
1
ADM809ZAKSZ-REEL
1
ADM809ZAKSZ-REEL7
1
ADM809ZAKSZ-REEL7
1
ADM809ZART-REEL
ADM809ZART-REEL7
ADM809ZARTZ-REEL
1
ADM809ZARTZ-REEL7
1
ADM810JAKS-REEL
ADM810JAKS-REEL7
ADM810JAKSZ-REEL
1
ADM810JAKSZ-REEL7
1
ADM810JART-REEL
ADM810JART-REEL7
ADM810JARTZ-REEL
1
ADM810JARTZ-REEL7
1
ADM810LAKS-REEL
ADM810LAKS-REEL7
ADM810LAKSZ-REEL
1
ADM810LAKSZ-REEL7
1
ADM810LART-REEL
ADM810LART-REEL7
ADM810LARTZ-REEL
1
ADM810LARTZ-REEL7
1
ADM810MAKS-REEL
ADM810MAKS-REEL7
ADM810MAKSZ-REEL
1
ADM810MAKSZ-REEL7
1
ADM810MART-REEL
ADM810MART-REEL7
ADM810MARTZ-REEL
1
ADM810MARTZ-REEL7
1
ADM810RAKS-REEL
ADM810RAKS-REEL7
REV. F
Threshold Reset (V)
2.63
2.63
2.63
2.63
2.63
2.63
2.93
2.93
2.93
2.93
2.93
2.93
2.93
2.93
3.08
3.08
3.08
3.08
3.08
3.08
3.08
3.08
2.32
2.32
2.32
2.32
2.32
2.32
2.32
2.32
2.32
2.32
4.00
4.00
4.00
4.00
4.00
4.00
4.00
4.00
4.63
4.63
4.63
4.63
4.63
4.63
4.63
4.63
4.38
4.38
4.38
4.38
4.38
4.38
4.38
4.38
2.63
2.63
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
–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
–5–
Branding
M4D
M4D
9RXX
9RXX
M4D
M4D
M9E
M9E
M53
M53
9SXX
9SXX
M53
M53
M9D
M9D
M4K
M4K
9TXX
9TXX
M4K
M4K
M9G
M9G
M4P
M4P
M4P
M4P
9ZXX
9ZXX
M4P
M4P
MAC
MAC
M6V
M6V
AJXX
AJXX
M6V
M6V
MAA
MAA
M6W
M6W
ALXX
ALXX
M6W
M6W
MAB
MAB
M6S
M6S
AMXX
AMXX
M6S
M6S
MAF
MAF
Quantity
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
10k
3k
Package Type
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SC70
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SOT-23
3-Lead SC70
3-Lead SC70
