Datasheet > ADM9690ARN

ADM9690ARN

更新时间： 2024-02-25 02:34:28

品牌	Logo	应用领域
其他 - ETC		监控
页数	文件大小	规格书
6页	82K
描述
IC-SM-SUPERVISORY CIRCUIT

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技术参数
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ADM9690ARN 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP,	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.12
可调阈值：	NO	模拟集成电路 - 其他类型：	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	4.9 mm	湿度敏感等级：	1
信道数量：	1	功能数量：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.75 mm
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	4.3 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	3.9 mm	Base Number Matches：	1

ADM9690ARN 数据手册

Power Supply and Watchdog Timer

Monitoring Circuit

ADM9690

FUNCTIO NAL BLO CK D IAGRAM

FEATURES

Precision Voltage Monitor (4.40 V)

Watchdog Tim eout Monitor

Selectable Watchdog Tim eout—0.75 m s, 1.5 m s,

12.5 m s, 25 m s

MON

ADM9690

Tw o RESET Outputs

4.40V

APPLICATIONS

Microprocessor System s

Com puters

RESET(1)

TIMER

OSC SEL1

OSC SEL2

WATCHDOG

TIMEBASE

RESET(2)

TIMER

RESET(2)

Printers

Controllers

Intelligent Instrum ents

WATCHDOG

TRANSITION

DETECTOR

WATCHDOG

INPUT (WDI)

GND

GENERAL D ESCRIP TIO N

T he watchdog timer monitoring circuit is designed to monitor

the activity on the WDI input. T his input is normally connected

to an output line on the µP. 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.

T he watchdog timer is restarted when RESET(1) goes inactive.

T he actual watchdog timeout period is adjustable using two

select inputs SEL1 and SEL2.

T he 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.

T he voltage monitoring comparator monitors the voltage on

_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. T hey will remain active while

V_MONis below the threshold, and for 50 ms (RESET(1)) or

60 ms (RESET(2)) after V_MONclimbs above the reset thresh-

old. RESET(1) is intended to provide a power-on reset signal

for the µP while RESET(2) is used to hold additional circuitry

in a reset state until the µP has regained control following a

power-up.

T he ADM9690 is available in an 8-lead SOIC package. It is

specified over the industrial temperature range.

REV. 0

Inform ation furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assum ed by Analog Devices for its

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.

Tel: 617/ 329-4700

Fax: 617/ 326-8703

World Wide Web Site: http:/ / w w w .analog.com

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