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参数资料
| 型号： | MIC2777-31YM5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR DUAL MCPWR SOT23-5 |
| 标准包装： | 1 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 补充型 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 3.09V，可调 |
| 工作温度： | -40°C ~ 85°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： | 标准包装 |
| 产品目录页面： | 1112 (CN2011-ZH PDF) |
| 其它名称： | 576-2688-6 |
MIC2777
Functional Diagram
V DD
Micrel, Inc.
V REF
One Shot
R
Q
/RST
IN
Delay
Line
S /Q
RST
V REF
MIC2777
GND
Functional Description
IN, Under-Voltage Detector Input
The voltage present at the IN pin is compared to the internal
300mV reference voltage. A reset is triggered if and when V IN
falls below V REF . Typically, a resistor divider is used to scale
the input voltage to be monitored such that V IN will fall below
V REF as the voltage being monitored falls below the desired
trip-point. Hysteresis is employed to prevent chattering due
to noise. The comparator on the IN input is relatively immune
to very brief negative-going transients.
V DD Input
The V DD pin is both the power supply terminal and a monitored
input voltage. The voltage at this pin is continually compared
against the internal reference. The trip-point at which a reset
occurs is factory programmed. A reset is triggered if and
when V DD falls below the trip-point. Hysteresis is employed
to prevent chattering due to noise. The comparator on the
V DD input is relatively immune to very brief negative-going
transients.
RST, /RST Reset Output
Typically, the MIC2777 is used to monitor the power supplies
of intelligent circuits such as microcontrollers and micropro-
cessors. By connecting the appropriate reset output of a
MIC2777 to the reset input of a μC or μP, the processor will
be properly reset at power-on and during power-down and
brown-out conditions.
The reset outputs are asserted any time V DD or V IN drops
below the corresponding threshold voltage. The reset outputs
remain asserted for t RST (min) after V IN and/or V DD subsequent
return above the threshold boundaries and/or /MR is released.
A reset pulse is also generated at power-on.
Manual Reset
The ability to initiate a reset via external logic or a manual
switch is provided in addition to the MIC2777’s automatic
supervisory functions. Typically, a momentary push-button
switch is connected such that IN is shorted to ground when
the switch contacts close. Assuming V DD and V IN are within
tolerance when the switch is released, the reset outputs will
be de-asserted no less than 140ms later. IN can also be driven
by an open-drain or open-collector logic signal.
November 2005
5
MIC2777
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2777-44BM5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC2777-44BM5 TR | 功能描述:IC SUPERVISOR DUAL MCPWR SOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:低有效 复位超时:标准传输延迟为 60 µs 电压 - 阀值:3V 工作温度:-40°C ~ 85°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:Digi-Reel® 其它名称:LM8364BALMF30DKR |
| MIC2777-44BM5TR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| MIC2777-44YM5 TR | 功能描述:监控电路 Dual Voltage Supervisor with 0.3V and 4.43V Thresholds, Active-High and Active-Low Push-Pull Outputs, 140ms Reset Pulse, Manual Reset, SOT23-5 (Lead Free) 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 |
| MIC2777-46BM5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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