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MCP111T-450E/TT Datasheet

  • MCP111T-450E/TT

  • SUPERVISOR, 1UA, SMD, SOT-23-3, 111; Voltage, Turn On Thresh...

  • 363.00KB

  • 26頁

  • Microchip   Microchip

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MCP111/112
4.0
APPLICATION INFORMATION
4.1
V
TRIP
Operation
For many of today鈥檚 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
system supply drops below the operating level momen-
tarily. The second most common cause is when a slowly
decaying power supply causes the microcontroller to
begin executing instructions without sufficient voltage to
sustain SRAM, thus producing indeterminate results.
Figure 4-1 shows a typical application circuit.
V
DD
3
0.1
碌F
V
DD
V
DD
R
PU
1
PICmicro
廬
Microcontroller
MCLR
(Reset Input)
GND
The voltage trip point (V
TRIP
) is determined on the falling
edge of V
DD
. The actual voltage trip point (V
TRIPAC
) will
be between the minimum trip point (V
TRIPMIN
) and the
maximum trip point (V
TRIPMAX
). There is a hysteresis on
this trip point to remove any 鈥渏itter鈥?that would occur on
the V
OUT
pin when the device V
DD
is at the trip point.
Figure 4-2 shows the state of the V
OUT
pin as deter-
mined by the V
DD
voltage. The V
TRIP
specification is for
falling V
DD
voltages. When the V
DD
voltage is rising, the
V
OUT
pin will not be driven high until V
DD
is at V
TRIP
+
V
HYS
.
MCP11X
V
OUT
V
SS
2
Note 1:
R
PU
may be required with the MCP111
due to the open-drain output. Resistor
R
PU
is not required with the MCP112.
FIGURE 4-1:
Typical Application Circuit.
V
DD
V
TRIPMAX
V
TRIPMIN
1V
V
TRIPAC
+ V
HYSAC
V
TRIPAC
V
TRIPAC
V
OUT
< 1 V is outside the
device specifications
FIGURE 4-2:
V
OUT
Operation as Determined by the V
TRIP
and V
HYS
.
錚?/div>
2004 Microchip Technology Inc.
DS21889B-page 11

MCP111T-450E/TT 產品屬性

  • Microchip

  • 監(jiān)控電路

  • 1

  • 4.38 V

  • 4.314 V

  • 4.446 V

  • Not Resettable

  • No Watchdog

  • 5.5 V

  • 1 V

  • 1.75 uA

  • + 125 C

  • SMD/SMT

  • SOT-23-3

  • Reel

  • - 40 C

  • 3000

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