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參數(shù)資料
| 型號(hào)： | STM1811M |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Low Power Reset Circuit |
| 中文描述： | 低功耗復(fù)位電路 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 321K |
| 代理商： | STM1811M |
STM1810/1811/1812/1813/1815/1816/1817/1818
4/20
SUMMARY DESCRIPTION
STM181x devices are low power reset devices
used to monitor power supplies for microcontrol-
lers. They perform a single function: asserting a
reset signal whenever V
CC
supply voltage drops
below a preset value and keeping it asserted until
V
CC
has risen above the preset threshold for a
minimum period of time (t
rec
). They provide excel-
lent circuit reliability without additional external
components
when
used with
(STM1815–STM1818), and +5V (STM1810–
STM1813) power supply systems.
A precision voltage reference and comparator
monitors the V
CC
input for an out-of-tolerance con-
dition. When an invalid V
CC
condition occurs, the
reset output (RST) is forced low (or high in the
case of RST) and remains asserted for t
rec
after
V
CC
rises above the reset threshold. The
STM1813/1818 also keep reset asserted for t
rec
after the output is momentarily pulled to ground by
an external push-button switch.
The STM1812 and STM1817 have an active-high,
push-pull output. The STM1810 and STM1815
(push-pull) and STM1811, STM1813, STM1816,
+3.0V/+3.3V
and STM1818 (open drain) have an active-low
RST output. The open drain devices (STM1811/
STM1813/STM1816/STM1818) also have an in-
ternal pull-up resistor to V
CC
. The STM1813 and
STM1818 feature a debounced manual reset fea-
ture that asserts a reset if the RST pin is pulled low
for more than 1.5μs. When used to initiate manual
reset, RST debounces signals from devices such
as mechanical switches. For devices with this fea-
ture, the release of the external switch triggers the
reset period.
The STM181x devices are guaranteed to output
the correct logic state for V
CC
down to 1.0V (0°C
to +105°C). They also provide a reset comparator
designed to ignore fast transients on V
CC
.
Reset thresholds are available between +2.55V
and +4.62V These small, low power devices are
ideal for use in portable equipment. All are avail-
able in the space-saving 3-pin SOT23 package,
and are specified from –40°C to +105°C.
Figure
4., page 5
shows a typical hardware hookup for
STM181x devices to a Microcontroller.
Figure 2. Logic Diagram
Note: 1. For STM1812, STM1817
Table 2. Signal Names
Note: 1. For STM1812, STM1817
Figure 3. SOT23-3 Connections
Note: RST for STM1812 and STM1817
AI09648
V
CC
STM181x
V
SS
RST (RST)
(1)
V
SS
Ground
RST
Active-low Reset Output
RST
(1)
Active-high Reset Output
V
CC
Supply Voltage and Input for Reset
Threshold Monitor
AI09649
2
3
1
RST (RST)
V
SS
V
CC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| STM1812 | Low Power Reset Circuit |
| STM1812L | Low Power Reset Circuit |
| STM1812M | Low Power Reset Circuit |
| STM1813 | Low Power Reset Circuit |
| STM1815 | Low Power Reset Circuit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STM1811MRWX7F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low power reset circuit |
| STM1811MSWX7F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low power reset circuit |
| STM1811MTWX7F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low power reset circuit |
| STM1811MWX7F | 功能描述:監(jiān)控電路 4.37VRST Active Low Open Drain reset RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| STM1812 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low power reset circuit |
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