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| 型号： | MIC2776N-BM5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR ADJ MCRPWR 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： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 可调节/可选择 |
| 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： | 带卷 (TR) |
| 其它名称： | MIC2776N-BM5TR |
MIC2776
Functional Diagram
V DD
/MR
I PU
Micrel, Inc.
IN
R
Q
/RST*
Delay
One Shot
S
/Q
RST*
V REF
GND
* Pinout and polarity vary by device type.
See ordering information table.
MIC2776
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 chat-
tering due to noise.
RST, /RST Reset Output
Typically, the MIC2776 is used to monitor the power supply
of intelligent circuits such as microcontrollers and micropro-
cessors. By connecting the reset output of a MIC2776 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 condi-
tions. In addition, asserting /MR, the manual reset input, will
activate the reset function.
The reset outputs are asserted any time /MR is asserted or
if V IN drops below the threshold voltage. The reset outputs
remain asserted for t RST (min) after V IN subsequently returns
above the threshold boundary and /MR is released. A reset
pulse is also generated at power-on.
/MR, Manual Reset Input
The ability to initiate a reset via external logic or a manual
switch is provided in addition to the MIC2776’s automatic
supervisory functions. Driving the /MR input to a logic low
causes an immediate and unconditional reset to occur. As-
suming V IN is within tolerance when /MR is released (returns
high), the reset output will be de-asserted no less than t RST
later. /MR may be driven by a logic signal, or mechanical
switch. Typically, a momentary push-button switch is con-
nected such that /MR is shorted to ground when the switch
contacts close. The switch may be connected directly between
/MR and GND. /MR has an internal 100nA pull-up current to
V DD and may be left open if unused.
November 2005
5
MIC2776
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2776N-BM5TX | 制造商:RF Micro Devices Inc 功能描述: |
| MIC2776NYM5 | 制造商:Micrel Inc 功能描述: |
| MIC2776N-YM5 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
| MIC2776N-YM5 TR | 功能描述:监控电路 Adjustable Voltage Supervisor with 0.3V Threshold, Manual Reset and Active-Low Open-Drain Output in SOT23-5 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 |
| MIC2776N-YM5TR | 制造商:Micrel 功能描述:Volt Supervisor Supply Micropower |
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