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參數(shù)資料
| 型號(hào)： | MIC812 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | 復(fù)位半導(dǎo)體 |
| 英文描述： | Microprocessor Reset Circuit(微處理器復(fù)位電路（監(jiān)視基于微處理器系統(tǒng)的電源）) |
| 中文描述： | 微處理器復(fù)位電路（微處理器復(fù)位電路（監(jiān)視基于微處理器系統(tǒng)的電源）） |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 159K |
| 代理商： | MIC812 |
Microprocessor Reset
The RESET pin is asserted whenever VCC falls below
the reset threshold voltage or if MR (manual reset) is
forced low. The reset pin remains asserted for a period
of 240ms after VCChas risen above the reset threshold
voltage or MR has returned 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.
VCCTransients
The MIC811/MIC812 are relatively immune to negative-
going VCCglitches below the reset threshold. Typically,
a negative-going transient 125mV below the reset
threshold with a duration of 50
μ
s (25
μ
s for
MIC81_R/S/T) or less will not cause an unwanted reset.
Interfacing to Bidirectional Reset Pins
The MIC811/MIC812 can interface with
μ
Ps with
bidirectional reset pins by connecting a 4.7K
resistor in
series with the MIC811/MIC812 output and the
μ
P reset
pin.
RESET Valid to 0V
A resistor can be added from the RESET pin to ground
to ensure the RESET output remains low with VCC
down to 0V. A 100K
resistor connected from RESET
to ground is recommended. The size of the resistor
should be large enough to not load the RESET output
and small enough to pull-down any stray leakage
currents.
Circuit Description
Figure 2. Reset Timing Diagram
Figure 3. RESET Valid to VCC= 0V.
VCC
MR
RESET
t1
t1
Vthr
MIC811/MIC812 Microprocessor Reset Circuits
5
VCC
RESET
μP
RESET
VCC
MIC811
VCC
100K
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC812_U | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Microprocessor Reset Circuits |
| MIC812JU | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC812JU TR | 功能描述:IC RESET GEN 4.00V VTH SOT143-4 RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡(jiǎn)單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 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:LM8364BALMF30DKR |
| MIC812JUY TR | 功能描述:監(jiān)控電路 Microprocessor Reset Circuit with Manual Reset, Push-Pull Active-High Output, 4.00V Threshold, 140ms reset pulse in SOT143-4 - 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: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(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 |
| MIC812LU | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Microprocessor Reset Circuits |
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