ADM823LYRJZ-R7 Analog Devices Inc, ADM823LYRJZ-R7 Datasheet

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ADM823LYRJZ-R7

Manufacturer Part Number
ADM823LYRJZ-R7
Description
IC,Power Supply Supervisor,TSOP,5PIN,PLASTIC
Manufacturer
Analog Devices Inc
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of ADM823LYRJZ-R7

Number Of Voltages Monitored
1
Output
Push-Pull, Totem Pole
Reset
Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
4.63V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ADM823LYRJZ-R7TR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADM823LYRJZ-R7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Precision 2.5 V to 5 V power supply monitor
7 reset threshold options: 2.19 V to 4.63 V
140 ms (minimum) reset timeout
Watchdog timer with 1.6 sec timeout (ADM823, ADM824)
Manual reset input (ADM823, ADM825)
Push-pull output stages
Low power consumption: 5 μA
Guaranteed reset output valid to V
Power supply glitch immunity
Specified over automotive temperature range
5-lead SC70 and SOT-23 packages
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
GENERAL DESCRIPTION
The ADM823/ADM824/ADM825 are supervisory circuits that
monitor power supply voltage levels and code execution integrity
in microprocessor-based systems. In addition to providing
power-on reset signals, an on-chip watchdog timer can reset the
microprocessor if it fails to strobe within a preset timeout
period. A reset signal can also be asserted by an external push-
button, through a manual reset input. The three parts feature
different combinations of watchdog input, manual reset input,
and output stage configuration, as shown in Table 1.
Table 1. Selection Table
Part No.
ADM823
ADM824
ADM825
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. 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.
RESET (ADM823)
RESET, RESET (ADM824/ADM825)
Watchdog Timer
Yes
Yes
CC
= 1 V
Manual Reset in 5-Lead SC70 and SOT-23
Supervisory Circuits with Watchdog and
Manual Reset
Yes
Yes
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
These parts are available in a choice of seven reset threshold
options ranging from 2.19 V to 4.63 V. The reset and watchdog
timeout periods are fixed at 140 ms (minimum) and 1.6 sec
(typical), respectively.
The ADM823/ADM824/ADM825 are available in 5-lead SC70
and SOT-23 packages and typically consume only 5 μA, making
them suitable for use in low power, portable applications.
V
MR
CC
V
ADM823/ADM824/ADM825
REF
ADM823
DEBOUNCE
FUNCTIONAL BLOCK DIAGRAM
GND
©2004–2010 Analog Devices, Inc. All rights reserved.
RESET
Push-Pull
Push-Pull
Push-Pull
GENERATOR
RESET
Figure 1.
WATCHDOG
DETECTOR
WDI
Output Stage
RESET
Push-Pull
Push-Pull
V
www.analog.com
CC
RESET

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ADM823LYRJZ-R7 Summary of contents

Page 1

FEATURES Precision 2 power supply monitor 7 reset threshold options: 2. 4.63 V 140 ms (minimum) reset timeout Watchdog timer with 1.6 sec timeout (ADM823, ADM824) Manual reset input (ADM823, ADM825) Push-pull output stages ...

Page 2

ADM823/ADM824/ADM825 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 Typical Performance ...

Page 3

SPECIFICATIONS 5.5 V for ADM82xL for ADM82xS 2 3.6 V for ADM82xR unless otherwise noted. A MIN MAX Table 2. ...

Page 4

ADM823/ADM824/ADM825 Parameter WATCHDOG INPUT (ADM823, ADM824) Watchdog Timeout Period WDI Pulse Width WDI Input Threshold WDI Input Current MANUAL RESET INPUT (ADM823, ADM825) MR Input Threshold MR Input Pulse Width MR Glitch Rejection MR Pull-Up Resistance MR to ...

Page 5

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V CC Output Current (RESET, RESET) All Other Pins Operating Temperature Range Storage Temperature Range θ Thermal Impedance JA SC70 SOT-23 Lead Temperature Soldering (10 sec) Vapor ...

Page 6

ADM823/ADM824/ADM825 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS RESET ADM823 GND 2 TOP VIEW (Not to Scale) MR WDI 3 4 Figure 2. ADM823 Pin Configuration Table 4. Pin Function Descriptions Pin No. Mnemonic 1 RESET 2 GND ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 10.0 9.5 9.0 8.5 ADM823L 8.0 7.5 7.0 6.5 6.0 ADM824Y 5.5 5.0 4.5 ADM825R 4.0 3.5 –40 – TEMPERATURE (°C) Figure 5. Supply Current vs. Temperature ...

Page 8

ADM823/ADM824/ADM825 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 –40 – TEMPERATURE (°C) Figure 11. Watchdog Timeout Period vs. Temperature (ADM823/ADM824) 160 RESET OCCURS ABOVE GRAPH 140 120 100 V = 4.63V TH ...

Page 9

CIRCUIT DESCRIPTION The ADM823/ADM824/ADM825 provide microprocessor supply voltage supervision by controlling the reset input of the microprocessor. Code execution errors are avoided during power-up, power-down, and brownout conditions by asserting a reset signal when the supply voltage is below a ...

Page 10

ADM823/ADM824/ADM825 APPLICATIONS INFORMATION WATCHDOG INPUT CURRENT To minimize the watchdog input current (and minimize overall power consumption), leave WDI low for the majority of the watchdog timeout period. When driven high, WDI can draw as much as 160 μA. Pulsing ...

Page 11

... MAX COPLANARITY 0.10 1.70 1.60 1.50 1.30 1.15 0.90 0.15 MAX 0.05 MIN ORDERING GUIDE Model 1 Reset Threshold (V) ADM823LYKSZ-R7 4.63 ADM823LYRJ-R7 4.63 ADM823LYRJZ-R7 4.63 ADM823MYKSZ-R7 4.38 ADM823MYRJZ-R7 4.38 ADM823TYKSZ-R7 3.08 ADM823TYRJ-R7 3.08 ADM823TYRJZ-R7 3.08 ADM823SYKSZ-R7 2.93 ADM823SYRJ-R7 2.93 ADM823SYRJZ-R7 2.93 2.20 2 ...

Page 12

ADM823/ADM824/ADM825 1 Model Reset Threshold (V) ADM823RYRJZ-R7 2.63 ADM823ZYKSZ-R7 2.32 ADM823YYKSZ-R7 2.19 ADM824LYRJZ-REEL7 4.63 ADM824SYKSZ-REEL7 2.93 ADM825LYRJ-R7 4.63 ADM825LYRJZ-R7 4.63 ADM825MYRJ-R7 4.38 ADM825TYKSZ-R7 3.08 ADM825TYRJ-R7 3.08 ADM825TYRJZ-R7 3.08 ADM825SYKSZ-R7 2.93 ADM825SYRJ-R7 2.93 ADM825SYRJZ-R7 2.93 ADM825RYRJ-R7 2.63 ADM825RYRJZ-R7 2.63 ADM825ZYKSZ-R7 2.32 ...

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