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參數資料
| 型號： | ADM708 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Cost uP Supervisory Circuits |
| 中文描述： | 低成本的監控電路 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 143K |
| 代理商： | ADM708 |
FUNCTIONAL BLOCK DIAGRAMS
WATCHDOG
TRANSITION
DETECTOR
WATCHDOG
INPUT (WDI)
POWER-FAIL
INPUT (PFI)
POWER-FAIL
OUTPUT (
PFO
)
WATCHDOG
OUTPUT (
WDO
)
RESET
*
VOLTAGE REFERENCE = 4.65V (ADM705), 4.40V (ADM706)
ADM705/
ADM706
RESET &
WATCHDOG
TIMEBASE
RESET
GENERATOR
MR
V
CC
250 A
V
CC
WATCHDOG
TIMER
4.65V
*
1.25V
1.25V
4.65V
*
POWER-FAIL
INPUT (PFI)
POWER-FAIL
OUTPUT (
PFO
)
RESET
*
VOLTAGE REFERENCE = 4.65V (ADM707), 4.40V (ADM708)
ADM707/
ADM708
RESET
GENERATOR
MR
V
CC
250 A
V
CC
RESET
REV. B
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
Low Cost P
Supervisory Circuits
ADM705–ADM708
FEATURES
Guaranteed
RESET
Valid with V
CC
= 1 V
190 A Quiescent Current
Precision Supply-Voltage Monitor
4.65 V (ADM705/ADM707)
4.40 V (ADM706/ADM708)
200 ms Reset Pulsewidth
Debounced TTL/CMOS Manual Reset Input (
MR
)
Independent Watchdog Timer—1.6 sec Timeout
(ADM705/ADM706)
Active High Reset Output (ADM707/ADM708)
Voltage Monitor for Power-Fail or Low Battery
Warning
Superior Upgrade for MAX705–MAX708
Also Available in MicroSOIC Packages
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Critical P Monitoring
Automotive Systems
Critical P Power Monitoring
GENERAL DESCRIPTION
The ADM705–ADM708 are low cost
μ
P supervisory circuits.
They are suitable for monitoring the 5 V power supply/battery
and can also monitor microprocessor activity.
The ADM705/ADM706 provide the following functions:
1. Power-On Reset output during power-up, power-down and
brownout conditions. The
RESET
output remains opera-
tional with V
CC
as low as 1 V.
2. Independent watchdog timeout,
WDO
, that goes low if the
watchdog input has not been toggled within 1.6 seconds.
3. A 1.25 V threshold detector for power-fail warning, low
battery detection or to monitor a power supply other than
5 V.
4. An active low debounced manual reset input (
MR
).
The ADM707/ADM708 differ in that:
1. A watchdog timer function is not available.
2. An active high reset output in addition to the active low
output is available.
Two supply-voltage monitor levels are available. The ADM705/
ADM707 generate a reset when the supply voltage falls below
4.65 V, while the ADM706/ADM708 require that the supply
fall below 4.40 V before a reset is issued.
All parts are available in 8-lead DIP and SOIC packages. The
ADM707 and ADM708 are also available in space-saving
microSOIC packages.
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
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|---|---|
| ADM708AN | Low Cost uP Supervisory Circuits |
| ADM708AR | Low Cost uP Supervisory Circuits |
| ADM708ARM | Low Cost uP Supervisory Circuits |
| ADM705-ADM708 | Low Cost uP Supervisory Circuits |
| ADM708S | +3 V, Voltage Monitoring uP Supervisory Circuits |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM7088ARZREEL | 制造商:Analog Devices 功能描述: |
| ADM708AN | 功能描述:IC SUPERVISOR MPU 4.4V WD 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:1 系列:- 類型:簡單復位/加電復位 監視電壓數目:1 輸出:開路漏極或開路集電極 復位:高有效 復位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應商設備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
| ADM708ANZ | 功能描述:IC SUPERVISOR MPU 4.4V WD 8-DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:1 系列:- 類型:簡單復位/加電復位 監視電壓數目:1 輸出:開路漏極或開路集電極 復位:高有效 復位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應商設備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
| ADM708AR | 功能描述:IC SUPERVISOR MPU 4.4 WD 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:400 系列:- 類型:備用電池電路 監視電壓數目:1 輸出:開路漏極，推挽式 復位:高有效/低有效 復位超時:最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR |
| ADM708ARM | 功能描述:IC SUPERVISOR MPU 4.4V WD 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:400 系列:- 類型:備用電池電路 監視電壓數目:1 輸出:開路漏極，推挽式 復位:高有效/低有效 復位超時:最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR |
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