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參數(shù)資料
| 型號(hào)： | FM1233LF |
| 英文描述： | Voltage Detector |
| 中文描述： | 電壓檢測(cè)器 |
| 文件頁(yè)數(shù)： | 4/6頁(yè) |
| 文件大?。?/td> | 44K |
| 代理商： | FM1233LF |
4
www.fairchildsemi.com
F
FM1233 Rev. A
General Description
The FM1233 features a highly accurate voltage reference against
which the Vcc is compared. Once the Vcc is below the specified
threshold, it will drive the RESET line and continue to hold it low
until the V
returns above the threshold and the time for the
RESET pulse duration has expired. The FM1233 is immune to short
negative going transients on the V
CC
line. The placement of a
0.1
μ
F bypass capacitor as close as possible to the V
CC
pin
provides additional transient immunity.
For a V
value below 1.0V-1.3V, the FM1233 does not sink current
on the RESET pin. This is not a problem in most systems since
most common devices are not functional in this range. If it is desired
for the FM1233 reset to be functional below the range above, it is
suggested to use a 100K
pull-down resistor between RESET and
V
SS
.
Bi-Directional Reset
The FM1233 allows for the connection of an external reset switch
to be wired to the reset pin. The FM1233 has the feature of allowing
an external reset pin to be connected without having to add
debounce logic or an extra pin to the package. The FM1233 detects
when an external source is pulling the reset line low. Once this
occurs the FM1233 will pull the reset line low as well. When the
external source stops driving the reset line the FM1233 will continue
to hold the reset line low so as to prevent debounce. After a certain
length of time the FM1233 will stop driving the reset line and it will
return to its non-active (high) state.
Interfacing to Bidirectional reset pins
FM1233 can be used with microprocessors with bidirectional reset
pins. The microprocessors can still drive the reset line but when the
microprocessor has released the reset line the FM1233 will
continue to hold it for a duration no longer that 300 ms.
Connecting an External Reset to the FM1233
Reset
FM1233
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FM1233LH | Voltage Detector |
| FM1233M | Voltage Detector |
| FM1233ME | RELAY |
| FM1233MF | Voltage Detector |
| FM1233MH | Voltage Detector |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FM1233LH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
| FM1233M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
| FM1233ME | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
| FM1233MF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
| FM1233MH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Detector |
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