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| 型号： | TC1271ALCVCTTR |
| 厂商： | Microchip Technology |
| 文件页数： | 19/48页 |
| 文件大小： | 0K |
| 描述： | IC RESET MONITOR 4.63V SOT23A-5 |
| 标准包装： | 1 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 最小为 17.5 ms |
| 电压 - 阀值： | 4.63V |
| 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： | 标准包装 |
| 产品目录页面： | 662 (CN2011-ZH PDF) |
| 其它名称： | TC1271ALCVCTDKR |
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TC1270A/70AN/71A
4.0
4.1
DEVICE OPERATION
General Description
and Figure 4-3 shows a typical circuit for an open-drain
device.
For many of today’s microcontroller applications, care
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
V DD
Voltage
Detect
VRST
system supply drops below the operating level
momentarily. 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),
MR
Circuit
Manual Reset
with Glitch
Filter Circuit
MRRST
Reset
Generator
Circuit
RST
or
RST
thus producing indeterminate results.
The TC127XA family (TC1270A, TC1270AN and
TC1271A) are cost-effective 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
FIGURE 4-1:
Diagram.
V DD
TC127XA High Level Block
below a safe operating level.
A Manual Reset input (MR pin) is provided. This allows
0.1 μF
V DD
TC1270A/1A
V DD
a push button switch to be directly connected to the
TC127XA device, and is suitable for use as a push
button Reset. This allows the system to easily be reset
from the external control of the push button switch. No
external components are required.
Push
Button
MR
RST
or
RST
V SS
Reset Input
V SS
The Reset pin (RST or RST) will be forced active, if any
of the following occur:
? During device power-up
? V DD goes below the device threshold voltage
? The Manual Reset input (MR) goes low
FIGURE 4-2:
Application Circuit.
V DD
Typical Push-Pull
devices. The device can be described with three
functional blocks. These are:
0.1 μF
V DD
TC1270AN
V DD
? Voltage detect circuit
? Manual Reset with glitch filter circuit
? Reset generator circuit
The Reset generator circuit controls the Reset delay
Push
Button
MR
RST
V SS
Reset Input
V SS
time of the Reset output signal.
There are three Reset Delay Timer options. Depending
on the option, the Reset signal (RST/RST pin) will be
held active for a minimum of 1.09 ms, 17.5 ms, or
FIGURE 4-3:
Application Circuit.
Typical Open-Drain
140 ms.
The TC1271A has an active-high RST output while the
TC1270A and TC1270AN have an active-low RST
output.
The TC1270A and TC1271A have a push-pull output
driver, while the TC1270AN has an open-drain output.
? 2007-2011 Microchip Technology Inc.
The TC1270A and TC1271A devices are available in a
4-Pin SOT-143 package (to maintain footprint
compatibility with the TC1270, TC1271, TCM811 and
TCM812 devices) and a SOT-23-5 package. The
TC1270AN is only available in the SOT-23-5 package.
Low supply current makes these devices suitable for
battery-powered applications.
Device specific block diagrams are presented in
DS22035D-page 19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1271ALCVRCTR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1271ALVCTTR | 功能描述:监控电路 5Pin uP Reset Mon 4.63V Reset Thresh 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 |
| TC1271ALVRCTR | 功能描述:监控电路 4Pin uP Reset Mon 4.63V Reset Thresh 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 |
| TC1271AMBVCTTR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1271AMBVRCTR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
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