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參數(shù)資料
| 型號(hào)： | ADM699SQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | Microprocessor Supervisory Circuits |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, CDIP8 |
| 封裝： | CERDIP-8 |
| 文件頁數(shù)： | 1/4頁 |
| 文件大小： | 254K |
| 代理商： | ADM699SQ |
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.
a
Microprocessor
Supervisory Circuits
ADM698/ADM699
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FUNCTIONAL BLOCK DIAGRAM
RESET
GENERATOR
4.65V
V
CC
WATCHDOG
IWDI
*
ADM698/
ADM699
RESET
WATCHDOG
OUTPUT WDO
*
RESET
*
*
WDI (ADM699 ONLY)
RESET (SOIC ONLY)
WDO (ADM699 SOIC ONLY)
TRANWATCHDOG
(1 sec)
TYPICAL APPLICATION CIRCUIT
*
ADM699 ONLY
+5V
V
CC
WDI
*
GND
ADM698/
ADM699
RESET
μP POWER
μP SYSTEM
I/O LINE
μP RESET
FEATURES
Superior Upgrade for MAX698/MAX699
Guaranteed
RESET
Assertion with V
CC
= 1 V
Low 0.6 mA Supply Current
Precision 4.65 V Voltage Monitor
Power OK/Reset Time Delay
Watchdog Timer
Minimum Component Count
Performance Specified over Temperature
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical
m
P Power Monitoring
GENERAL DESCRIPTION
The ADM698/ADM699 supervisory circuits provide power
supply monitoring and watchdog timing for microprocessor
systems.
The ADM698 monitors the 5 V V
CC
power supply and gener-
ates a
RESET
pulse during power up, power down and during
low voltage “Brown Out” conditions. The
RESET
output is
guaranteed to be functional (logic low) with V
CC
as low as 1 V.
The ADM699 features an identical monitoring circuit as in the
ADM698 plus an additional watchdog timer input to monitor
microprocessor activity. The
RESET
output is forced low if the
watchdog input is not toggled within the 1 second watchdog
timeout period.
Both parts are available in 8-pin plastic DIP and 16-lead SOIC
packages. The 16-lead SOIC contains additional outputs
RESET
(without inversion) and Watchdog Output
WDO
(ADM699 only).
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