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參數(shù)資料
| 型號(hào)： | MCP130-485FI |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Microcontroller Supervisory Circuit with Open Drain Output |
| 中文描述： | 微控制器監(jiān)控電路的開漏輸出 |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大小： | 221K |
| 代理商： | MCP130-485FI |
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MCP120/130
DS11184D-page 4
2001 Microchip Technology Inc.
2.0
APPLICATIONS INFORMATION
2.1
The Need for Supervisory Circuits
For many of today
’
s microcontroller applications, care
must be taken to prevent low power conditions that can
cause many different system problems. The most com-
mon causes are brown-out conditions where the sys-
tem supply drops below the operating level momentar-
ily, and the second, is when a slowly decaying power
supply causes the microcontroller to begin executing
instructions without enough voltage to sustain SRAM
and producing indeterminate results.
Figure 2-1:
Typical Application
2.2
Negative Going V
DD
Transients
Many system designers implementing POR circuits are
concerned about the minimum pulse width required to
cause a reset. Figure 2-2 shows typical transient
voltage below the trip point (V
TRIP
- V
DD
) vs. transient
duration. It shows that the farther below the trip point
the transient pulse goes, the duration of the pulse
required to cause a reset gets shorter. A 0.1
μ
F bypass
cap mounted as close as possible to the V
DD
pin pro-
vides additional transient immunity.
Figure 2-2:
Typical Transient Response
Microcontroller
MCLR
or
RESET
V
SS
RST
MCP120
V
SS
V
DD
V
DD
Bypass
Capacitor
V
DD
TIME
S
0
0
5V
V
TRIP
MAX
V
TRIP
MIN
Transient
Duration
(V
TRIP
MIN
-
V
DD
)
0
1
2
3
V
TRIP
- V
DD
(V)
10
8
6
4
2
0
T
μ
S
)
4
5
T
A
= +25
°
C
Transients above the
curve will cause a reset
Transients below
the curve will NOT
cause a reset
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP130-485FI/TO | 功能描述:監(jiān)控電路 w/5K Pull-Up Low 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 |
| MCP130-485GI | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Microcontroller Supervisory Circuit with Open Drain Output |
| MCP130-485HI | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Microcontroller Supervisory Circuit with Open Drain Output |
| MCP130-485HI/TO | 功能描述:監(jiān)控電路 w/5K Pull-Up Low 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 |
| MCP130-485I/SN | 功能描述:監(jiān)控電路 w/5K Pull-Up Low 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 |
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