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參數資料
| 型號： | ADM8618ZACYKS-RL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | Low-Voltage Manual Reset & Watchdog Supervisory Circuits in 4-Lead SC70 |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO4 |
| 封裝： | PLASTIC, EIAJ SC82, SC70, 4 PIN |
| 文件頁數： | 1/7頁 |
| 文件大小： | 109K |
| 代理商： | ADM8618ZACYKS-RL7 |
Low-Voltage Manual Reset & Watchdog
Supervisory Circuits in 4-Lead SC70
ADM8611/ADM8616/ADM8617/ADM8618
Preliminary Technical Data
FEATURES
Precision 1.8V to 5V Power Supply Monitoring
9 Reset Threshold Options:
1.58V to 4.63V
140ms (Min) Reset Timeout
Manual Reset Input (ADM8611)
Watchdog Timer (ADM8616–ADM8618)
Reset Output Stages
Push-Pull Active-Low
Open-Drain Active-Low
Push-Pull Active-High
Low Power Consumption (3μA)
Guaranteed Reset Output valid to V
CC
=1V
Power Supply Glitch Immunity
Specified Over -40°C to +85°C Temperature Range
4-Lead SC70 Package
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Portable Equipment
GENERAL DESCRIPTION
The ADM8611/ADM8616/ADM8617/ADM8618 are
supervisory circuits which monitor power supply voltage levels
and code execution integrity in microprocessor-based systems.
A power-on-reset signal is generated when the supply voltage
rises to a preset threshold level. The ADM8611’s debounced
manual reset input can be used to initiate a reset by means of an
external push-button or logic signal. The ADM8616–ADM8618
have an on-chip watchdog timer which can reset the
microprocessor if it fails to strobe within a preset timeout
period.
Rev.
PrB
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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAMS
Figure 1.
Each part is available in a choice of the following 9 reset
threshold options: 1.58V, 1.67V, 2.19V, 2.32V, 2.63V, 2.93V,
3.08V, 4.38V and 4.63V. The reset timeout periods are 20ms
(min) and 140ms (min) for the ADM8611 and ADM8616–
ADM8618, respectively. The watchdog timeout period is 1.6s
(typ). The parts differ in terms of reset output configuration, as
indicated in table 1.
The ADM8611/ADM8616/ADM8617/ADM8618 are available
in 4-lead SC70 packages and typically consume only 3μA,
making them suitable for use in low power portable
applications
.
Table 1. Selection Table
Output Stage
RESET
Push-Pull
Push-Pull
Open-Drain
Part No.
Manual Reset
Watchdog
RESET
Push-Pull
ADM8611
ADM8616
ADM8617
ADM8618
Yes
-
-
-
-
Yes
Yes
Yes
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