ADM1818-10ART-RL7 [ADI]
Microprocessor Reset Circuits; 微处理器复位电路
| 型号： | ADM1818-10ART-RL7 |
| 厂家： | 
ADI |
| 描述： | Microprocessor Reset Circuits |
| 文件： | 总4页 (文件大小：70K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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Microprocessor Reset Circuits
ADM1810–ADM1813/ADM1815–ADM1818
FUNCTIONAL BLOCK DIAGRAMS
FEATURES
Reliable Low Cost Voltage Monitor with Reset Output
Supports Monitoring of Supplies Within 5%, 10%, 15%
and 20% Tolerance
Active High and Low Push-Pull Output Choices
(ADM1810, ADM1812, ADM1815 and ADM1817)
Open Drain Output Choices (ADM1811, ADM1813,
ADM1816 and ADM1818)
Can Be Used with a Manual Push-Button to Generate a
Reset (ADM1813, ADM1818)
Initialize Microprocessor Systems with Added Safety
ADM1810/ADM1815
ADM1812/ADM1817
ADM1813/ADM1818
V
CC
RST
V
CC
TOLERANCE
BIAS
150ms
DELAY
TC
GND
REFERENCE
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
V
CC
RST
V
CC
TOLERANCE
BIAS
150ms
DELAY
TC
GND
REFERENCE
GENERAL DESCRIPTION
The ADM181x range of voltage monitoring circuits can be used
in any application where an electronic system needs to be reset
when a voltage increases above or below a predetermined value.
V
CC
5.5k⍀
RESET
RST
MONITOR
Because of the “reset delay time” incorporated into the ADM181x
series, these devices can provide a safe startup for electronic
systems. Before a system initializes, the power supply must stabi-
lize. Using the ADM181x series ensures that there are typically
150 ms for the power supply to stabilize before the system is
reset and safe system initialization begins.
V
CC
TOLERANCE
BIAS
150ms
DELAY
TC
GND
REFERENCE
The ADM181x series of microprocessor reset circuits are avail-
able in low cost, space-saving SOT-23 packages.
ADM1811/ADM1816
V
CC
5.5k⍀
RST
V
CC
TOLERANCE
BIAS
150ms
DELAY
TC
GND
REFERENCE
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 1999
ADM1810–ADM1813/ADM1815–ADM1818–SPECIFICATIONS
(TA = –40؇C to +85؇C unless otherwise noted)
Parameter
Min
Typ
Max Units Test Conditions/Note
SUPPLY
Voltage
Current
1.2
5.5
40
V
µA
30
(ADM1810/ADM1811/ADM1813)
CC < 5.5 V, RST Output Open
V
30
28
40
35
µA
µA
(ADM1812) VCC < 5.5 V
(ADM1815/ADM1816/ADM1817/ADM1818)
VCC < 5.5 V, RST Output Open
OUTPUT CURRENT
OUTPUT VOLTAGE
8
mA
µA
@ 0.4 V, VCC ≥ 2.7 V*
(ADM1810/ADM1812/ADM1815/ADM1817)
@ 2.4 V, VCC ≥ 2.7 V
350
V
CC – 0.5
VCC – 0.1
V
(ADM1810/ADM1812/ADM1815/ADM1817)
@ 0 µA to 500 µA
V
CC TRIP-POINT
ADM1810-5, ADM1810-10, ADM1810-15/
ADM1811/ADM1812/ADM1813-5
ADM1811/ADM1812/ADM1813-10
ADM1811/ADM1812/ADM1813-15
ADM1815/ADM1816/ADM1817/
ADM1818-5
ADM1815/ADM1816/ADM1817/
ADM1818-10
ADM1815/ADM1816/ADM1817/
ADM1818-20
4.50
4.25
4.00
4.62
4.35
4.13
4.75
4.49
4.24
V
V
V
(5%)
(10%)
(15%)
2.98
2.80
2.47
3.06
2.88
2.55
3.15
2.97
2.64
V
V
V
(5%)
(10%)
(20%)
INTERNAL PULL-UP RESISTOR
ADM1811/ADM1813/ADM1816/ADM1818
3.5
5.5
7.5
10
kΩ
pF
ms
OUTPUT CAPACITANCE
RESET ACTIVE TIME
100
150
300
V
CC DETECT TO RST
Falling
5
7
150
10
15
300
µs
µs
ms
(ADM1810/ADM1811/ADM1812/ADM1813)
(ADM1815/ADM1816/ADM1817/ADM1818)
tR = 5 µs
Rising
100
1
PUSH-BUTTON DETECT TO RST
µs
(ADM1813/ADM1818)
PUSH-BUTTON RESET
100
100
150
150
300
300
ms
ms
(ADM1818) 2.7 V ≤ VCC ≤ 3.3 V
(ADM1813)
NOTES
*For ADM181x-20, VCC = VCCTP, sink current reduces to 8 mA.
Specifications subject to change without notice.
–2–
REV. 0
ADM1810–ADM1813/ADM1815–ADM1818
ORDERING GUIDE
PIN CONFIGURATION
Trip-
Point
Package
Option
Brand
Information
Model*
1
2
RST/RST
ADM1810-5ART-REEL
4.62 V
RT-3 (SOT-23) MZV
RT-3 (SOT-23) MZV
RT-3 (SOT-23) MZT
RT-3 (SOT-23) MZT
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
ADM181x
TOP VIEW
3
GND
ADM1810-5ART-REEL7 4.62 V
ADM1810-10ART-REEL 4.25 V
(Not to Scale)
V
CC
ADM1810-10ART-RL7
ADM1810-15ART-REEL
ADM1810-15ART-RL7
ADM1811-5ART-REEL
ADM1811-5ART-RL7
4.25 V
4.12 V
4.12 V
4.50 V
4.50 V
MZQ
MZQ
M1V
M1V
ADM1811-10ART-REEL 4.35 V
RT-3 (SOT-23) M1T
RT-3 (SOT-23) M1T
ADM1811-10ART-RL7
ADM1811-15ART-REEL
ADM1811-15ART-RL7
ADM1812-5ART-REEL
ADM1812-5ART-RL7
4.35 V
4.00 V
4.00 V
4.50 V
4.50 V
RT-3 (SOT-23)
RT-3 (SOT-23)
M1Q
M1Q
PIN FUNCTION DESCRIPTIONS
Pin Mnemonic Function
RT-3 (SOT-23) MTV
RT-3 (SOT-23) MTV
RT-3 (SOT-23) MTT
RT-3 (SOT-23) MTT
ADM1812-10ART-REEL 4.35 V
1
RST/RST
Reset Output. RST/RST remains active while
VCC is below the reset threshold, and re-
mains active for 150 ms (typ) after VCC rises
above the reset threshold.
Supply Voltage Being Monitored.
0 V. Ground Reference for All Signals.
ADM1812-10ART-RL7
ADM1812-15ART-REEL
ADM1812-15ART-RL7
ADM1813-5ART-REEL
ADM1813-5ART-RL7
ADM1813-10ART-REEL
ADM1813-10ART-RL7
ADM1813-15ART-REEL
ADM1813-15ART-RL7
ADM1815-10ART-REEL
ADM1815-10ART-RL7
ADM1815-20ART-REEL
ADM1815-20ART-RL7
ADM1816-10ART-REEL
ADM1816-10ART-RL7
ADM1816-20ART-REEL
ADM1816-20ART-RL7
ADM1817-10ART-REEL
ADM1817-10ART-RL7
ADM1817-20ART-REEL
ADM1817-20ART-RL7
ADM1818-10ART-REEL
ADM1818-10ART-RL7
4.35 V
4.00 V
4.00 V
4.50 V
4.50 V
4.35 V
4.35 V
4.00 V
4.00 V
2.88 V
2.88 V
2.55 V
2.55 V
2.88 V
2.88 V
2.55 V
2.55 V
2.88 V
2.88 V
2.55 V
2.55 V
2.88 V
2.88 V
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
RT-3 (SOT-23)
MTQ
MTQ
M3V
M3V
M3T
M3T
M3Q
M3Q
M5E
M5E
M5A
M5A
M6E
M6E
M6A
M6A
M7E
M7E
M7A
M7A
M8E
M8E
2
3
VCC
GND
V
CC
V
TRIP-POINT(MAX)
CC
V
TRIP-POINT
CC
V
TRIP-POINT(MIN)
CC
V
TO RESET
DELAY
CC
RST
V
OL
Figure 1. Power-Down Timing Diagram
ADM1818-20ART-REEL 2.55 V
ADM1818-20ART-RL7
RT-3 (SOT-23) M8A
RT-3 (SOT-23) M8A
2.55 V
NOTES
RL7 or REEL7 are in reels of 3000 parts. REEL are in reels of 10000 parts.
All models in bold are ex-stock. Consult factory for availability.
*Only Available in Reels.
V
TRIP-POINT (MAX)
CC
ABSOLUTE MAXIMUM RATINGS*
V
TRIP-POINT
CC
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1.2 V to +5.5 V
Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 µA
Operating Temperature Range . . . . . . . . . . . –40°C to +85°C
Power Dissipation, RT-3, SOT-23 . . . . . . . . . . . . . . 320 mW
Derate by 4 mW/°C Above +70°C
V
TRIP-POINT (MIN)
CC
V
CC
RESET ACTIVE TIMEOUT
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 333°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
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 kV
RST
Figure 2. Power-Up Timing Diagram
*Typical values are measured at TA = +25°C unless otherwise noted.
REV. 0
–3–
ADM1810–ADM1813/ADM1815–ADM1818
ADM1813 AND ADM1818
ADM1811 AND ADM1816
The ADM1813 and ADM1818 are low cost voltage monitoring
devices with the inclusion of an optional push-button reset
function.
The ADM1811 is a low cost voltage monitor with an open drain
output. The ADM1811 is designed to monitor 5 V supplies.
The ADM1811 range comes in three different variants which
allow the monitoring of a 5 V supply with a tolerance of 5%,
10% and 15%. The ADM1816 is a 3.3 V version of the ADM1811
and supports 5%, 10% and 20% tolerance options.
V
CC
ADM1813/
ADM1818
MICRO-
PROCESSOR
V
CC
V
CC
ADM1811/
ADM1816
RST
RESET
MICRO-
PROCESSOR
GND
V
CC
RST
RESET
GND
Figure 3. ADM1813/ADM1818 Typical Application
Figure 6. ADM1811/ADM1816 Typical Application
An optional push-button reset switch can be connected be-
tween RST and ground. Pressing this switch will pull the reset
output low. If the push-button reset button pulls the RST
output low for a period greater than 1 µs, then, when the reset
button releases the RST line to float high, the RST line will
stay low for a further 150 ms typical.
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
3-Lead Plastic Surface Mount Package (SOT-23)
(RT-3)
PUSH-BUTTON TIME
RESET TIMEOUT
0.1200 (3.048)
0.1102 (2.799)
VOLTAGE
INPUT HIGH
VOLTAGE
INPUT LOW
3
0.0550 (1.397)
0.0470 (1.194)
0.1040 (2.642)
0.0827 (2.101)
1
2
Figure 4. Push-Button Reset Timing Diagram
PIN 1
The ADM1818 range has options which allow the user to
monitor 3.3 V supplies with 10% and 20% tolerance options.
While the ADM1813 range has options which allow the user
to monitor 5 V supplies with 5%, 10% and a 15% tolerance
options.
0.0236 (0.599)
0.0177 (0.450)
0.0413 (1.049)
0.0374 (0.950)
0.0807 (2.050)
0.0701 (1.781)
0.0059 (0.150)
0.0034 (0.086)
0.0440 (1.118)
0.0320 (0.813)
0.0040 (0.102)
0.0005 (0.013)
ADM1810, ADM1812, ADM1815 AND ADM1817
0.0210 (0.533)
0.0146 (0.371)
0.0100 (0.254)
0.0050 (0.127)
0.027 (0.686)
REF
SEATING
PLANE
The ADM1812 is a 5 V low cost voltage monitor with an active
high push-pull output. The ADM1812 supports 5%, 10% and
15% tolerances. The ADM1810 is similar to the ADM1812,
except that the ADM1810 has an active low push-pull output.
The ADM1817 is 3.3 V voltage monitor with an active high
push-pull output. The ADM1817 supports 5%, 10% and 20%
tolerances. The ADM1815 is similar to the ADM1817, except
that the ADM1815 has an active low push-pull output.
The ADM1810/ADM1812/ADM1815/ADM1817 can be con-
nected directly to most microprocessor-reset inputs without the
need for external components.
V
CC
ADM1810/
ADM1812/
ADM1815/
ADM1817
MICRO-
PROCESSOR
V
CC
RST/
RST
RESET
GND
Figure 5. ADM1810/ADM1812/ADM1815/ADM1817
Typical Application
–4–
REV. 0
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