ADM809 Analog Devices, ADM809 Datasheet

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ADM809

Manufacturer Part Number
ADM809
Description
Microprocessor Supervisory Circuit in 3-Lead SOT-23 & SC70, Active-Low Push-Pull Output
Manufacturer
Analog Devices
Datasheet

Specifications of ADM809

# Of Monitored Voltages
1
Backup-battery Switch
No
Manual Reset Capability
No
Package
SC70,SOT
Reset Threshold Summary
7 Options--2.32 to 4.63V
Reset Output-stage
Active-Low/Push-Pull
Min Reset Timeout (ms)
140
Watchdog Timer
No

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FEATURES
Specified over temperature
Low power consumption: 17 μA
Precision voltage monitor: 2.5 V, 3 V, 3.3 V, 5 V options
Reset assertion down to 1 V V
140 ms minimum power-on reset
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
provide 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 operational with V
ADM809 provide an active low reset signal ( RESET ), whereas
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.
Rev. H
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.
Open-drain RESET output (ADM803)
Push-pull RESET output (ADM809)
Push-pull RESET output (ADM810)
CC
as low as 1 V. The ADM803 and
CC
Microprocessor Supervisory Circuits
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Seven reset threshold voltage options are available, suitable for
monitoring a variety of supply voltages (see Table 3).
The reset comparator features built-in glitch immunity, making
it immune to fast transients on V
The ADM803/ADM809/ADM810 consume only 17 μA, making
them suitable for low power, portable equipment. The ADM803
is available in a 3-lead SC70; the ADM809/ADM810 are available
in 3-lead SOT-23 and 3-lead SC70 packages.
V
CC
V
V
CC
CC
in 3-Lead SC70 and SOT-23
ADM803/ADM809
ADM803/ADM809/ADM810
ADM809/ADM810
V
V
FUNCTIONAL BLOCK DIAGRAMS
REF
REF
ADM803
GND
V
CC
©1997–2008 Analog Devices, Inc. All rights reserved.
RESET
*ADM803 ONLY
GND
GND
Figure 1.
GENERATOR
GENERATOR
RESET
RESET
240ms
240ms
*R
CC
PULL-UP
.
RESET
INPUT
MICROPROCESSOR
www.analog.com
SYSTEM
GND
V
RESET
(RESET)
RESET
CC

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ADM809 Summary of contents

Page 1

... The reset output remains operational with V as low The ADM803 and CC ADM809 provide an active low reset signal ( RESET ), whereas 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 ...

Page 2

... ADM803/ADM809/ADM810 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagrams ............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 REVISION HISTORY 8/08—Rev Rev. H Added Figure 4; Renumbered Sequentially .................................. 5 Changes to Figure 8 .......................................................................... 6 Updated Outline Dimensions ......................................................... 9 Changes to Ordering Guide .......................................................... 10 9/06—Rev Rev. G Updated Outline Dimensions ......................................................... 9 Changes to Ordering Guide ............................................................ 9 6/05— ...

Page 3

... −40°C to +125° 25°C (ADM809/ADM810 only −40°C to +85°C (ADM809/ADM810 only −40°C to +125°C (ADM809/ADM810 only 25° −40°C to +85° −40°C to +125° 25°C ...

Page 4

... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 3. Reset Threshold Options RESET Model ADM8xxL Ratings ADM8xxM −0 ADM8xxJ (ADM809/ADM810 Only) −0 0 ADM8xxT ADM8xxS 20 mA ADM8xxR ADM8xxZ 20 mA − ...

Page 5

... PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS GND 1 ADM803/ ADM809/ 3 TOP VIEW (Not to Scale) RESET 2 Figure 3. ADM803/ADM809 Pin Configuration Table 4. Pin Function Descriptions Pin No. ADM803/ADM809 ADM810 Mnemonic 1 1 GND N/A 2 RESET 2 N/A RESET Description Ground Reference for All Signals Active High Logic Output. RESET remains high while V and remains high for 240 ms (typical) after V Active Low Logic Output ...

Page 6

... CH1 Rev Page –40 – TEMPERATURE (°C) –40 – TEMPERATURE (°C) SUPPLY VOLTAGE 5V p-p T RESET OUTPUT VOLTAGE ADM809T ADM809R T 2.00V CH2 2.00V M 200ms CH1 Figure 10. Reset Output Voltage vs. Supply Voltage 2.00V ...

Page 7

... ADM8xxL/M/J 100 ADM8xxR/S/T 100 RESET COMPARATOR OVERDRIVE, V Figure 11. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive 1000 – V (mV Rev Page ADM803/ADM809/ADM810 ...

Page 8

... ADM803/ADM809/ADM810 to other devices. ENSURING A VALID RESET OUTPUT DOWN falls below 0.8 V, the ADM803/ADM809 RESET no When V CC longer sinks current. A high impedance CMOS logic input connected to RESET may, therefore, drift to undetermined logic levels. To eliminate this problem, a 100 kΩ resistor should be connected from RESET to ground ...

Page 9

... COMPLIANT TO JEDEC STANDARDS TO-236-AB Figure 14. 3-Lead Small Outline Transistor Package [SOT-23-3] (RT-3) Dimensions shown in millimeters 2.20 2.00 1.80 2.40 3 2.10 1. PIN 1 0.65 BSC 0.40 1.10 0.10 0.80 0.26 0.40 0.10 SEATING 0.25 PLANE 0.10 COPLANARITY ALL DIMENSIONS COMPLIANT WITH EIAJ SC70 Figure 15. 3-Lead Thin Shrink Small Outline Transistor Package [SC70] (KS-3) Dimensions shown in millimeters Rev Page ADM803/ADM809/ADM810 0.55 REF 0.30 0.20 0.10 ...

Page 10

... ADM809LAKSZ-REEL 4.63 2 ADM809LAKSZ-REEL7 4.63 ADM809LART-REEL 4.63 ADM809LART-REEL7 4.63 2 ADM809LARTZ-REEL 4.63 2 ADM809LARTZ-REEL7 4.63 ADM809MAKS-REEL7 4.38 2 ADM809MAKSZ-REEL 4.38 2 ADM809MAKSZ-REEL7 4.38 ADM809MART-REEL 4.38 ADM809MART-REEL7 4.38 2 ADM809MARTZ-REEL 4.38 2 ADM809MARTZ-REEL7 4.38 ADM809RAKS-REEL 2.63 ADM809RAKS-REEL7 2.63 ADM809RAKSZ-REEL 2 2.63 2 ADM809RAKSZ-REEL7 2.63 ADM809RART-REEL 2.63 ADM809RART-REEL7 2.63 2 ADM809RARTZ-REEL 2.63 2 ADM809RARTZ-REEL7 2.63 1 Temperature Range Branding −40°C to +125°C M02 −40°C to +125°C M02 −40°C to +125°C M6L −40°C to +125°C M6L − ...

Page 11

... Model Reset Threshold (V) ADM809SAKS-REEL 2.93 ADM809SAKS-REEL7 2.93 2 ADM809SAKSZ-REEL 2.93 2 ADM809SAKSZ-REEL7 2.93 ADM809SART-REEL 2.93 ADM809SART-REEL7 2.93 2 ADM809SARTZ-REEL 2.93 ADM809SARTZ-REEL7 2 2.93 ADM809TAKS-REEL7 3.08 2 ADM809TAKSZ-REEL 3.08 2 ADM809TAKSZ-REEL7 3.08 ADM809TART-REEL 3.08 ADM809TART-REEL7 3.08 2 ADM809TARTZ-REEL 3.08 2 ADM809TARTZ-REEL7 3.08 ADM809ZAKS-REEL 2.32 ADM809ZAKS-REEL7 2.32 2 ADM809ZAKSZ-REEL 2.32 2 ADM809ZAKSZ-REEL7 2.32 ADM809ZART-REEL 2.32 ADM809ZART-REEL7 2.32 2 ADM809ZARTZ-REEL 2.32 2 ADM809ZARTZ-REEL7 2.32 ADM810JAKS-REEL 4.00 ADM810JAKS-REEL7 4.00 2 ADM810JAKSZ-REEL 4.00 2 ADM810JAKSZ-REEL7 4.00 ADM810JART-REEL7 4.00 2 ADM810JARTZ-REEL 4.00 ADM810JARTZ-REEL7 2 4.00 ADM810LAKS-REEL7 4.63 2 ADM810LAKSZ-REEL 4.63 2 ADM810LAKSZ-REEL7 4.63 ADM810LART-REEL 4.63 ADM810LART-REEL7 4.63 2 ADM810LARTZ-REEL 4.63 2 ADM810LARTZ-REEL7 4.63 ADM810MAKS-REEL7 4 ...

Page 12

... ADM803/ADM809/ADM810 Model Reset Threshold (V) ADM810SAKS-REEL7 2.93 2 ADM810SAKSZ-REEL 2.93 2 ADM810SAKSZ-REEL7 2.93 ADM810SART-REEL7 2.93 2 ADM810SARTZ-REEL 2.93 ADM810SARTZ-REEL7 2 2.93 ADM810TAKS-REEL7 3.08 ADM810TAKSZ-REEL 2 3.08 2 ADM810TAKSZ-REEL7 3.08 ADM810TART-REEL7 3.08 2 ADM810TARTZ-REEL 3.08 2 ADM810TARTZ-REEL7 3.08 ADM810ZAKS-REEL 2.32 ADM810ZAKS-REEL7 2.32 2 ADM810ZAKSZ-REEL 2.32 2 ADM810ZAKSZ-REEL7 2.32 ADM810ZART-REEL 2.32 ADM810ZART-REEL7 2.32 2 ADM810ZARTZ-REEL 2.32 2 ADM810ZARTZ-REEL7 2. Date code, may be top or bottom marked RoHS Compliant Part. 3 RoHS compliant part has XX branded on the bottom of the device. ...

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