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| 型号： | MCP1318MT-29LE/OT |
| 厂商： | Microchip Technology |
| 文件页数： | 27/52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
4.0
OPERATIONAL DESCRIPTION
For many of today’s microcontroller applications, care
V DD
must be taken to prevent low-power conditions that can
cause many different system problems. The most
common causes are brown-out conditions, where the
system supply drops below the operating level momen-
tarily. The second most common cause is when a
slowly decaying power supply causes the
microcontroller to begin executing instructions without
sufficient voltage to sustain volatile memory (RAM),
thus producing indeterminate results. Figure 4-1 shows
0.1
μF
V DD
MCP13XX
RST
RST (2)
MR
WDI
R PU ( 1 )
V DD
PIC ?
Microcontroller
MCLR
(Reset input)
(active-low)
I/O
a typical application circuit.
The MCP131X/2X family is voltage supervisor devices
designed to keep a microcontroller in Reset until the
system voltage has reached and stabilized at the
proper level for reliable system operation. These
devices also operate as protection from brown-out
conditions when the system supply voltage drops
below a safe operating level.
Push button
switch
V SS
To system
device that
requires active-
high resets
V SS
Some MCP131X/2X family members include a Watch-
dog Timer feature that after being enabled (by a falling
edge on the WDI pin), monitors the WDI pin for falling
or rising edges. If an edge transition is not detected
within the expected time frame, the MCP131X/2X
devices will force the Reset pin active. This is useful to
ensure that the embedded system’s Host Controller
program is operating as expected.
Some MCP131X/2X family members include a Manual
Reset feature that allows a push button switch to be
directly connected to the MCP131X/2X devices (on the
MR pin). This allows the system to easily be reset from
Note 1: Resistor R PU may be required with the
MCP1320, MCP1321 or MCP1322 due
to the open-drain output.
Resistor R PU may not be required with
the MCP1316M, MCP1318M or
MCP1319M due to the internal pull-up
resistor.
The MCP1316, MCP1317, MCP1318
and MCP1319 do not require the
external pull-up resistor.
2: Not all devices offer the active-high
Reset output pin.
the external control of the push button switch.
A superset block diagram is shown in Figure 4-2 , with
FIGURE 4-1:
+
Typical Application Circuit.
V DD
Comparator
RST
–
Reference
Output
Driver
RST
Voltage
MR
Noise Filter
WDI
Watchdog
V SS
Note: Features available depend on the device.
? 2005-2012 Microchip Technology Inc.
FIGURE 4-2:
Family Block Diagram.
DS21985C-page 27
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MCP1318T | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Voltage Supervisor |
| 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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