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| 型号： | MCP111T-450E |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | Micropower Voltage Detector |
| 中文描述： | 微功耗电压检测器 |
| 文件页数： | 4/22页 |
| 文件大小： | 332K |
| 代理商： | MCP111T-450E |
MCP111/112
DS21889B-page 12
2004 Microchip Technology Inc.
4.2
Negative Going VDD Transients
The minimum pulse width (time) required to cause a
reset may be an important criteria in the implementa-
tion of a POR circuit. This time is referred to as
transient duration and is the amount of time needed for
these supervisory devices to respond to a drop in VDD.
The transient duration time is dependant on the magni-
tude of VTRIP – VDD. Generally speaking, the transient
duration decreases with increases in VTRIP – VDD.
Figure 4-3 shows a typical transient duration vs. reset
comparator overdrive for which the MCP111/112 will
not generate a reset pulse. 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. Figure 2-18 shows the transient response
characteristics for the MCP111/112.
A 0.1 F bypass cap mounted as close as possible to
the VDD pin provides additional transient immunity
(refer to Figure 4-1).
FIGURE 4-3:
Example of Typical
Transient Duration Waveform.
4.3
Effect of Temperature on Time-out
Period (tRPU)
The time-out period (t
RPU) determines how long the
device remains in the reset condition. This is affected
by both V
DD and temperature. The graph shown in
Figures 2-22,
2-23 and
2-24 show the typical
response for different V
DD values and temperatures.
Time (s)
0V
S
uppl
y
V
o
lt
a
g
e
5V
VTRIP(MIN) - VDD
tTRANS
VTRIP(MAX)
VTRIP(MIN)
相关PDF资料 |
PDF描述 |
|---|---|
| MCP111T-450LB | Micropower Voltage Detector |
| MCP111T-450TT | Micropower Voltage Detector |
| MCP111T-475E | Micropower Voltage Detector |
| MCP111T-475LB | Micropower Voltage Detector |
| MCP111T-475TT | Micropower Voltage Detector |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP111T-450E/LB | 功能描述:监控电路 Open Drain RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MCP111T-450E/MB | 功能描述:监控电路 Open Drain RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MCP111T-450E/TT | 功能描述:监控电路 Open Drain RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MCP111T-450I/LB | 功能描述:监控电路 Open Drain RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MCP111T-450I/TT | 功能描述:监控电路 Open Drain RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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