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參數(shù)資料
| 型號(hào)： | MIC2775-XXBM5 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Micro-Power Voltage Supervisor Advance Information |
| 中文描述： | 微功率電壓監(jiān)控進(jìn)展信息 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 365K |
| 代理商： | MIC2775-XXBM5 |
MIC2775
Application Information
Ensuring Proper Operation at Low Supply
At levels of V
DD
below 1.2V, the MIC2775
’
s /RST output
cannot turn on sufficiently to produce a valid logic-low on
/RST. In this situation, circuits driven by /RST could be
allowed to float, causing undesired operation. (In most cases,
however, it is expected that the circuits driven by the MIC2775
will be similarly inoperative at V
DD
≤
1.2V.)
If a given application requires that /RST be valid below V
DD
= 1.2V, this can be accomplished by adding a pull-down
resistor to the /RST output. A value of 100k
is recom-
mended as this is usually an acceptable compromise of
quiescent current and pull-down current. The resistor
’
s value
is not critical, however. See Figure 1.
Micrel
MIC2775
6
September 29, 2000
/RST
RST
VDD
/MR
Manual
Reset
GND
MIC2775-XX
/RESET
VCC
GND
V
CC
MICROPROCESSOR
100k
Figure 1. MIC2775 Valid /Reset Below 1.2V
The statements above also apply to the MIC2775
’
s RST
output. That is, to ensure valid RST signal levels at V
DD
<
1.2V, a pull-up resistor (as opposed to a pull-down) should be
added to the RST output. A value of 100k
is typical for this
application as well. See Figure 2.
/RST
RST
VDD
/MR
GND
MIC2775-XX
/RESET
VCC
GND
V
CC
Manual
Reset
MICROPROCESSOR
100k
Rpull-down
Figure 2. MIC2775 Valid Reset Below 1.2V
Transient response
The MIC2775 is inherently immune to very short negative-
going
“
glitches.
”
Very brief transients may exceed the voltage
threshold without tripping the output.
As shown in Figure 3, in general the narrower the transient,
the deeper the threshold overdrive that will be ignored by the
MIC2775. The graph represents the typical allowable tran-
sient duration for a given amount of threshold overdrive that
will not generate a reset.
0
20
40
60
80
100
0
500
1000
1500
2000
M
μ
s
RESET COMP. OVERDRIVE, V
REF
–
V
DD
(mV)
Typical V
DD
Transient Response
Figure 3. Typical V
DD
Transient Response
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2776H-BM5 TR | 功能描述:IC SUPERVISOR MICROPOWER SOT23-5 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 |
| MIC2776H-YM5 TR | 功能描述:監(jiān)控電路 Adjustable Voltage Supervisor with 0.3V Threshold, Manual Reset and Active-High Push-Pull Output in SOT23-5 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 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 |
| MIC2776H-YM5TR | 制造商:Micrel Inc 功能描述: |
| MIC2776H-YM5-TR | 功能描述:Supervisor Complementary 1 Channel SOT-23-5 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 類型:簡單復(fù)位/加電復(fù)位 受監(jiān)控電壓數(shù):1 輸出:補(bǔ)充型 復(fù)位:高有效 復(fù)位超時(shí):最小為 140 ms 電壓 - 閾值:可調(diào)節(jié)/可選擇 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商器件封裝:SOT-23-5 標(biāo)準(zhǔn)包裝:1 |
| MIC2776L-BM5 TR | 功能描述:IC SUPERVISOR MICROPOWER SOT23-5 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 |
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