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參數(shù)資料
| 型號(hào)： | MIC706 |
| 廠(chǎng)商： | Micrel Semiconductor,Inc. |
| 英文描述： | μP Supervisory Circuit(μP監(jiān)控電路（帶看門(mén)狗定時(shí)器，電源故障警告和手動(dòng)復(fù)位）) |
| 中文描述： | 微處理器監(jiān)控電路（微處理器監(jiān)控電路（帶看門(mén)狗定時(shí)器，電源故障警告和手動(dòng)復(fù)位）） |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 177K |
| 代理商： | MIC706 |
6
The output of the watchdog timer (WDO) will remain
high if WDI sees a valid transition within the watchdog
timeout period or if WDI is left floating. If VCC falls
below the reset threshold voltage then WDO goes low
immediately regardless of WDI. Thus, if WDI is left
floating, then WDO can be used as a low line indicator.
Microprocessor Reset
The RESET pin is asserted whenever VCC falls below
the reset threshold voltage or when MR goes low. The
reset pin remains asserted for a period of 200ms after
VCC has risen above the reset threshold voltage and
MR goes high. The reset function ensures the
microprocessor is properly reset and powers up into a
known condition after a power failure. RESET will
remain valid with VCCas low as 1.4V.
Power Fail Warning
An additional comparator which is independent of other
functions on the MIC705/706/707/708 is provided for
early warning of power failure. An external voltage
divider can be used to compare unregulated DC to an
internal 1.25V reference. The voltage divider ratio on
the input of the power fail comparator (PFI) can be
chosen so as to trip the power fail comparator a few
milliseconds before VCC falls below the maximum reset
threshold voltage. The output of the power fail
comparator (PFO) can be used to interrupt the
microprocessor when used in this mode and execute
shut-down procedures prior to power loss.
Watchdog Timer
The microprocessor can be monitored by connecting
the WDI pin (watchdog input) to a bus line or I/O line. If
a transition doesn’t occur on the WDI pin within the
watchdog timeout period, then WDO will go low. A
minimum pulse of 50ns or any transition low-to-high or
high-to-low on the WDI pin will reset the watchdog timer.
+
-
1.25V
R1
R2
Unregulated DC
PFO
PFI
Figure 3. Power Fail Comparator
Circuit Description
Figure 4. Reset Timing Diagram
VCC
MR
RESET
V
RT
t
MR
t
MD
t
RS
t
RS
WDO
MIC705/6/7/8
μ
P Supervisory Circuits
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC708 | μP Supervisory Circuit(μP監(jiān)控電路（帶電源故障警告和手動(dòng)復(fù)位）) |
| MIC707 | μP Supervisory Circuit(μP監(jiān)控電路（帶電源故障警告和手動(dòng)復(fù)位）) |
| MIC706S | μP Supervisory Circuit(μP監(jiān)控電路（帶看門(mén)狗定時(shí)器，微處理器復(fù)位，電源故障警告和手動(dòng)復(fù)位功能）) |
| MIC706P | 40000 SYSTEM GATE 3.3 VOLT LOGIC CELL AR - NOT RECOMMENDED for NEW DESIGN |
| MIC70__M | レP Supervisory Circuits |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC706M | 功能描述:IC SUPERVISOR 4.4V VTH 8-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 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):標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 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® 其它名稱(chēng):LM8364BALMF30DKR |
| MIC706M TR | 功能描述:IC SUPERVISOR 4.4V VTH 8-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 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):標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 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® 其它名稱(chēng):LM8364BALMF30DKR |
| MIC706MY | 功能描述:監(jiān)控電路 uP Supervisor, Watchdog Timer, Active-Hi, 4.4V VTH, SOIC-08 - Lead Free RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MIC706MY TR | 功能描述:監(jiān)控電路 uP Supervisor, Watchdog Timer, Active-Hi, 4.4V VTH, SOIC-08 - Lead Free RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MIC706N | 功能描述:IC SUPERVISOR 4.4V VTH 8-DIP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 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):標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 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® 其它名稱(chēng):LM8364BALMF30DKR |
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