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MCP130-485DI/TO Datasheet

  • MCP130-485DI/TO

  • IC, SUPERVISOR, 4.85V, LOW, TO92; Threshold Voltage:4.725V; ...

  • 16頁

  • Microchip   Microchip

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MCP120/130
2.0
2.1
APPLICATIONS INFORMATION
The Need for Supervisory Circuits
5V
SUPPLY VOLTAGE
V
TRIP
MAX
V
TRIP
MIN
(V
TRIP
MIN
-
V
DD
)
Transient
Duration
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 com-
mon causes are brown-out conditions where the sys-
tem supply drops below the operating level momentar-
ily, and the second, is when a slowly decaying power
supply causes the microcontroller to begin executing
instructions without enough voltage to sustain SRAM
and producing indeterminate results.
V
DD
V
DD
Microcontroller
MCP120
V
SS
RST
Bypass
Capacitor
V
DD
0
0
TIME
10
T
A
= +25擄C
TRANSIENT DURATION (
碌
S
)
MCLR
or
RESET
8
6
Transients above the
curve will cause a reset
4
V
SS
2
Figure 2-1:
Typical Application
0
Transients below
the curve will NOT
cause a reset
0
1
2
3
V
TRIP
- V
DD
(V)
4
5
2.2
Negative Going V
DD
Transients
Figure 2-2:
Typical Transient Response
Many system designers implementing POR circuits are
concerned about the minimum pulse width required to
cause a reset. Figure 2-2 shows typical transient
voltage below the trip point (V
TRIP
- V
DD
) vs. transient
duration. It shows that the farther below the trip point
the transient pulse goes, the duration of the pulse
required to cause a reset gets shorter. A 0.1
碌F
bypass
cap mounted as close as possible to the V
DD
pin pro-
vides additional transient immunity.
DS11184D-page 4
錚?/div>
2001 Microchip Technology Inc.

MCP130-485DI/TO 產(chǎn)品屬性

  • Microchip

  • 監(jiān)控電路

  • 1

  • 3 V, 3.3 V, 5 V

  • 4.6 V

  • 4.85 V

  • Active Low, Open Drain

  • Not Resettable

  • No Watchdog

  • No Backup

  • 350 ms

  • 5.5 V

  • 1 V

  • 60 uA

  • + 85 C

  • Through Hole

  • TO-92-3

  • Bulk

  • - 40 C

  • No

  • 1000

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