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| 型号： | MCP1318MT-29LE/OT |
| 厂商： | Microchip Technology |
| 文件页数： | 37/52页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR 2.9V OD/PP SOT23-5 |
| 标准包装： | 3,000 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 2.9V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
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MCP131X/2X
5.7
Controllers and Processors With
5.8
RESET Signal Integrity During
Bidirectional I/O Pins
Some microcontrollers have bidirectional Reset pins.
Depending on the current drive capability of the
controller pin, an indeterminate logic level may result if
there is a logic conflict. This can be avoided by adding
a 4.7 k Ω resistor in series with the output of the
MCP131X/2X ( Figure 5-7 ). If there are other
components in the system that require a Reset signal,
they should be buffered so as not to load the Reset line.
If the other components are required to follow the
Reset I/O of the microcontroller, the buffer should be
connected as shown with the solid line.
Power-Down
The MCP131X/2X Reset output is valid to V DD = 1.0V.
Below this 1.0V, the output becomes an "open circuit"
and does not sink or source current. This means
CMOS logic inputs to the microcontroller will be floating
at an undetermined voltage. Most digital systems are
completely shut down well above this voltage.
However, in situations where the Reset signal must be
maintained valid to V DD = 0V, external circuitry is
required.
For devices where the Reset signal is active-low, a pull-
down resistor must be connected from the
MCP131X/2X Reset pin(s) to ground to discharge stray
V DD
Buffer
Buffered Reset
To Other System
Components
capacitances and hold the output low ( Figure 5-8 ).
Similarly, for devices where the Reset signal is active-
high, a pull-up resistor to V DD is required to ensure a
valid high Reset signal for V DD below 1.0V.
MCP13XX
RST
GND
4.7 k Ω
PIC ?
MCU
MCLR
GND
This resistor value, though not critical, should be
chosen such that it does not appreciably load the Reset
pin(s) under normal operation (100 k Ω will be suitable
for most applications).
V DD
FIGURE 5-7: Interfacing the
MCP131X/2X Push-Pull Outputs to a
Bidirectional Reset I/O.
V DD
MCP13XX
RST
GND
R 1
100 k Ω
FIGURE 5-8:
Ensuring a Valid Active-low
Reset Pin Output State as V DD Approaches 0V.
? 2005-2012 Microchip Technology Inc.
DS21985C-page 37
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| MCP1318MT-46LE/OT | 功能描述:监控电路 Active high P-P 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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| MCP1318T-29HE/OT | 功能描述:监控电路 ACTIVE LOW/HIGH P-P WDI 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 |
| MCP1318T-29LE/CH | 功能描述:监控电路 WDI Active Lo P-P Active HI P-P 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 |
| MCP1318T-29LE/OT | 功能描述:监控电路 Active low P-P 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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