- 您现在的位置：买卖IC网 > PDF目录375260 > ADM9690AR (ANALOG DEVICES INC) Power Supply and Watchdog Timer Monitoring Circuit PDF资料下载
参数资料
| 型号： | ADM9690AR |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 电源管理 |
| 英文描述： | Power Supply and Watchdog Timer Monitoring Circuit |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封装： | SOIC-8 |
| 文件页数： | 1/6页 |
| 文件大小： | 76K |
| 代理商： | ADM9690AR |
REV. A
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
ADM9690
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2000
Power Supply and Watchdog Timer
Monitoring Circuit
FUNCTIONAL BLOCK DIAGRAM
WATCHDOG
TRANSITION
DETECTOR
V
CC
V
MON
OSC SEL1
OSC SEL2
RESET(2)
TIMER
RESET(1)
TIMER
4.31V
ADM9690
RESET(1)
RESET(2)
WATCHDOG
INPUT (WDI)
GND
WATCHDOG
TIMEBASE
FEATURES
Precision Voltage Monitor (4.31 V)
Watchdog Timeout Monitor
Selectable Watchdog Timeout—0.75 ms, 1.5 ms,
12.5 ms, 25 ms
Two RESET Outputs
APPLICATIONS
Microprocessor Systems
Computers
Printers
Controllers
Intelligent Instruments
GENERAL DESCRIPTION
The ADM9690 contains a voltage monitoring comparator and a
watchdog timer monitor. It is designed to monitor the 5 V
power supply to a microprocessor and the microprocessor opera-
tion via a watchdog function.
The voltage monitoring comparator monitors the voltage on
V
MON
. If it drops outside tolerance, as will happen during a
power-fail, two reset signals are generated. Both reset signals go
active (low) simultaneously. They will remain active while
V
MON
is below the threshold, and for 50 ms (RESET(1
)
) or
60 ms (RESET(2
)
) after V
MON
climbs above the reset thresh-
old. RESET(1) is intended to provide a power-on reset signal
for the
μ
P while RESET(2
)
is used to hold additional circuitry
in a reset state until the
μ
P has regained control following a
power-up. The voltage monitoring circuitry remains operational
with V
CC
as low as 2 V.
The watchdog timer monitoring circuit is designed to monitor
the activity on the WDI input. This input is normally connected
to an output line on the
μ
P. Its function is to check that the
microprocessor has not stalled in an infinite loop. If there is a
period of inactivity for the watchdog timeout period, both reset
outputs are activated. As above, RESET(1
)
remains low for
50 ms while RESET(2) remains low for an additional 10 ms.
The watchdog timer is restarted when RESET(1
)
goes inactive.
The actual watchdog timeout period is adjustable using two
select inputs SEL1 and SEL2.
The ADM9690 is available in an 8-lead SOIC package. It is
specified over the industrial temperature range.
相关PDF资料 |
PDF描述 |
|---|---|
| ADMC200AP | Motion Coprocessor |
| ADMC200 | Motion Coprocessor(动作协处理器) |
| ADMC201AP | Motion Coprocessor |
| ADMC201 | Motion Coprocessor(动作协处理器) |
| ADMC300 | High Performance DSP-Based Motor Controller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM9690ARN | 制造商:Rochester Electronics LLC 功能描述:SUPERVISOR WITH 2 RESETS I.C. - Bulk 制造商:Analog Devices 功能描述:SUPERVISORY CIRCUIT 9690 SOIC8 |
| ADM9690ARN-REEL | 制造商:Analog Devices 功能描述:Processor Supervisor 4.31V 4.31V 8-Pin SOIC N T/R |
| ADM9690ARNZ | 功能描述:IC SUPERVISOR PS/WATCHDOG 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| ADM9690ARNZ-REEL | 功能描述:IC SUPERVISOR PS/WATCHDOG 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:400 系列:- 类型:备用电池电路 监视电压数目:1 输出:开路漏极，推挽式 复位:高有效/低有效 复位超时:最小为 35 ms 电压 - 阀值:4.65V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:带卷 (TR) 其它名称:ADM691ARZ-REEL7TR |
| ADM-9F6-GR | 制造商:Pan Pacific 功能描述: |
发布紧急采购，3分钟左右您将得到回复。