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參數(shù)資料
| 型號(hào)： | ADM708RAR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | +3 V, Voltage Monitoring uP Supervisory Circuits |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁(yè)數(shù)： | 8/8頁(yè) |
| 文件大小： | 129K |
| 代理商： | ADM708RAR |
REV. A
–8–
ADM706P/R/S/T, ADM708R/S/T
Microprocessor activity is monitored using the WDI input. This
is driven using an output line from the processor. The software
routines should toggle this line at least once every 1.6 seconds.
If a problem occurs and this line is not toggled, then WDO goes
low and a nonmaskable interrupt is generated. This interrupt
routine may be used to clear the problem.
If, in the event of inactivity on the WDI line, a system reset is
required, then the
WDO
output should be connected to the
input as shown in Figure 16.
ADM706
RESET
GND
I/O LINE
m
P
MR
PFI
WDI
WDO
RESET
Figure 16.
RESET
from WDO
Monitoring Additional Supply Levels
It is possible to use the power-fail comparator to monitor a
second supply as shown in Figure 17. The two sensing resistors
R1 and R2 are selected such that the voltage on PFI drops below
1.25 V at the minimum acceptable input supply. The
PFO
output
may be connected to the
MR
input so that a RESET is gener-
ated when the supply drops out of tolerance. In this case if
either supply drops out of tolerance, a RESET will be generated.
ADM706
PFI
RESET
GND
m
P
MR
WDI
PFO
RESET
V
CC
R1
R2
V
X
+3V/+3.3V
Figure 17. Monitoring 3 V/3.3 V and an Additional
Supply, V
X
m
Ps with Bidirectional
RESET
In order to prevent contention for microprocessors with a bidi-
rectional reset line, a current limiting resistor should be inserted
between the ADM70x
RESET
output pin and the
μ
P reset pin.
This will limit the current to a safe level if there are conflicting
output reset levels. A suitable resistor value is 4.7 k
. If the re-
set output is required for other uses, then it should be buffered
as shown in Figure 18.
ADM70x
RESET
GND
m
P
RESET
GND
BUFFERED
RESET
+3V/+3.3V
V
CC
Figure 18. Bidirectional I-O RESET
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
8-Lead SOIC
(SO-8)
8-Lead Plastic DIP
(N-8)
P
C
SEATING
PLANE
0.060 (1.52)
0.015 (0.38)
0.210
(5.33)
MAX
0.022 (0.558)
0.014 (0.356)
0.160 (4.06)
0.115 (2.93)
0.070 (1.77)
0.045 (1.15)
0.130
(3.30)
MIN
8
1
4
5
PIN 1
0.280 (7.11)
0.240 (6.10)
0.100 (2.54)
BSC
0.430 (10.92)
0.348 (8.84)
0.195 (4.95)
0.115 (2.93)
0.015 (0.381)
0.008 (0.204)
0.325 (8.25)
0.300 (7.62)
0.0098 (0.25)
0.0075 (0.19)
0.0500 (1.27)
0.0160 (0.41)
8
8
0
8
0.0196 (0.50)
0.0099 (0.25)
3
45
8
8
5
4
1
0.1968 (5.00)
0.1890 (4.80)
0.2440 (6.20)
0.2284 (5.80)
PIN 1
0.1574 (4.00)
0.1497 (3.80)
0.0500 (1.27)
BSC
0.0688 (1.75)
0.0532 (1.35)
SEATING
PLANE
0.0098 (0.25)
0.0040 (0.10)
0.0192 (0.49)
0.0138 (0.35)
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PDF描述 |
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| ADM708SAN | +3 V, Voltage Monitoring uP Supervisory Circuits |
| ADM708SAR | +3 V, Voltage Monitoring uP Supervisory Circuits |
| ADM708T | Analog Switch / Multiplexer (Mux) IC; On-Resistance, Rds(on):100ohm; Analog Switch Function:SPST; No. of Channels:4; Leakage Current:1nA; Supply Voltage Max:44V; Package/Case:16-DIP; Leaded Process Compatible:No RoHS Compliant: No |
| ADM708TAN | +3 V, Voltage Monitoring uP Supervisory Circuits |
| ADM708TAR | Analog Switch / Multiplexer (Mux) IC; Analog Switch Function:SPST; Package/Case:16-SOIC; Leaded Process Compatible:No; Leakage Current:1nA; No. of Channels:4; On Resistance, Rds(on):100ohm; Peak Reflow Compatible (260 C):No RoHS Compliant: No |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| ADM708RAR-REEL | 功能描述:IC SUPERVISOR MPU 2.63V WD 8SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類(lèi)型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開(kāi)路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱(chēng):ADM691ARZ-REEL7TR |
| ADM708RARZ | 功能描述:IC SUPERVISOR MPU 2.63V WD 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 其它有關(guān)文件:STM6717 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:多壓監(jiān)控器 監(jiān)視電壓數(shù)目:2 輸出:開(kāi)路漏極或開(kāi)路集電極 復(fù)位:低有效 復(fù)位超時(shí):最小為 600 ms 電壓 - 閥值:1.11V，3.075V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1194 (CN2011-ZH PDF) 其它名稱(chēng):497-7019-6 |
| ADM708RARZ-REEL | 功能描述:IC SUPERVISOR MPU 2.63V WD 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:400 系列:- 類(lèi)型:備用電池電路 監(jiān)視電壓數(shù)目:1 輸出:開(kāi)路漏極，推挽式 復(fù)位:高有效/低有效 復(fù)位超時(shí):最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱(chēng):ADM691ARZ-REEL7TR |
| ADM708S | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:3 V, Voltage Monitoring Microprocessor Supervisory Circuits |
| ADM708SAN | 制造商:Analog Devices 功能描述:Processor Supervisor 2.93V 2.93V 8-Pin PDIP 制造商:Analog Devices 功能描述:PROCESSOR SUPERVISOR 2.93V 350UA 8PDIP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:RESET GENERATOR I.C. - Bulk |
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