2024年4月11日发(作者：席阳华)
查询ADM803LAKS-REEL供应商
Microprocessor Supervisory Circuits
FEATURES
Specified over Temperature
Low Power Consumption (17 A)
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
GENERAL DESCRIPTION
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 µA, making
it 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.
REV.C
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 companies.
in 3-Lead SC70 and SOT-23
ADM803/ADM809/ADM810
FUNCTIONAL BLOCK DIAGRAM
ADM803
V
CC
RESET
V
GENERATOR
RESET
REF
240ms
GND
ADM809 / ADM810
V
CC
RESET
V
GENERATOR
RESET
REF
240ms
(RESET)
GND
V
CC
V
CC
*R
V
PULL-UP
CC
ADM803 / ADM809
MICROPROCESSOR
SYSTEM
RESET
RESET
INPUT
GNDGND
*ADM803 ONLY
Figure l Operating Circuit
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703© 2003 Analog Devices, Inc. All rights reserved.
ADM803/ADM809/ADM810–SPECIFICATIONS
(V = full operating range, T = T
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 otherwise noted.)
CCA
CC
MIN
to T
MAX
,
Parameter
V
CC
OPERATING VOLTAGE RANGE
Supply Current
Min
1.0
1.2
TypMax
5.5
5.5
35
30
60
60
Unit
V
V
µA
µA
µA
µA
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
µs
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
240460
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 µA
V
CC
> V
TH
max, I
SOURCE
= 500 µA,
ADM809R/S/T/Z
V
CC
> V
TH
max, I
SOURCE
= 800 µA,
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 µA
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.
Specifications subject to change without notice.
0.8 V
CC
V
1µA
–2–
REV. C
2024年4月11日发(作者：席阳华)
查询ADM803LAKS-REEL供应商
Microprocessor Supervisory Circuits
FEATURES
Specified over Temperature
Low Power Consumption (17 A)
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
GENERAL DESCRIPTION
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 µA, making
it 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.
REV.C
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 companies.
in 3-Lead SC70 and SOT-23
ADM803/ADM809/ADM810
FUNCTIONAL BLOCK DIAGRAM
ADM803
V
CC
RESET
V
GENERATOR
RESET
REF
240ms
GND
ADM809 / ADM810
V
CC
RESET
V
GENERATOR
RESET
REF
240ms
(RESET)
GND
V
CC
V
CC
*R
V
PULL-UP
CC
ADM803 / ADM809
MICROPROCESSOR
SYSTEM
RESET
RESET
INPUT
GNDGND
*ADM803 ONLY
Figure l Operating Circuit
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703© 2003 Analog Devices, Inc. All rights reserved.
ADM803/ADM809/ADM810–SPECIFICATIONS
(V = full operating range, T = T
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 otherwise noted.)
CCA
CC
MIN
to T
MAX
,
Parameter
V
CC
OPERATING VOLTAGE RANGE
Supply Current
Min
1.0
1.2
TypMax
5.5
5.5
35
30
60
60
Unit
V
V
µA
µA
µA
µA
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
µs
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
240460
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 µA
V
CC
> V
TH
max, I
SOURCE
= 500 µA,
ADM809R/S/T/Z
V
CC
> V
TH
max, I
SOURCE
= 800 µA,
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 µA
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.
Specifications subject to change without notice.
0.8 V
CC
V
1µA
–2–
REV. C