MCP111-450E/TO Microchip Technology, MCP111-450E/TO Datasheet - Page 12

• Manufacturer Part Number: MCP111-450E/TO
• Description: IC VOLT DET 4.38V LOW TO-92
• Manufacturer: Microchip Technology
• Type: Simple Reset/Power-On Resetr

Specifications of MCP111-450E/TO

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Voltage - Threshold: 4.38V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-92-3 (Standard Body), TO-226
• Threshold Voltage: 4.38V
• No. Of Supervisors / Monitors: 1
• Supply Voltage Range: 1V To 5.5V
• Reset Type: Active-Low
• Supply Current: 1µA
• Digital Ic Case Style: TO-92
• No. Of Pins: 3
• Operating: RoHS Compliant
• Monitored Voltage: 4.38 V
• Manual Reset: Not Resettable
• Watchdog: No Watchdog
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Supply Current (typ): 1.75 uA
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Reset Timeout: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP111/112
4.2
The minimum pulse width (time) required to cause a
reset may be an important criteria in the implementa-
tion of a Power-on Reset (POR) circuit. This time is
referred to as transient duration, defined as the amount
of time needed for these supervisory devices to
respond to a drop in V
dependant on the magnitude of V
speaking, the transient duration decreases with
increases in V
Figure 4-3 shows a typical transient duration vs. reset
comparator overdrive for which the MCP111/112 will
not generate a reset pulse. 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. Figure 2-18 shows the transient response
characteristics for the MCP111/112.
A 0.1 µF bypass capacitor, mounted as close as
possible to the V
immunity (refer to Figure 4-1).
FIGURE 4-3:
Transient Duration Waveform.
DS21889D-page 12
5V
0V
Negative Going V
TRIP
DD
– V
t
TRANS
Time (µs)
pin, provides additional transient
DD
DD
Example of Typical
. The transient duration time is
.
V
TRIP(MIN)
DD
TRIP
Transients
– V
- V
DD
DD
V
V
. Generally
TRIP(MAX)
TRIP(MIN)
4.3
The time-out period (t
device remains in the reset condition. This is affected
by both V
Figures 2-22, 2-23 and 2-24 show the typical response
for different V
4.4
Figure 4-4 shows the typical application circuit for using
the MCP111 for voltage supervisory function when the
PICmicro microcontroller will be programmed via the
In-Circuit
feature. Additional information is available in TB087,
“Using Voltage Supervisors with PICmicro
troller Systems which Implement In-Circuit Serial
Programming™”, DS91087.
FIGURE 4-4:
for PICmicro
feature.
Note:
MCP111
V
V
SS
Effect of Temperature on Time-out
Period (t
Using in PICmicro
Microcontroller ICSP™
Applications (MCP111 only)
DD
RST
DD
It is recommended that the current into the
RST pin be current limited by a 1 k
resistor.
DD
and temperature. The graph shown in
®
Serial
values and temperatures.
Microcontroller with the ICSP™
0.1 µF
1 k
RPU
Typical Application Circuit
RPU
© 2005 Microchip Technology Inc.
)
Programming™
) determines how long the
R
V
PU
DD
®
/V
PP
MCLR
(reset input)
(Active-Low)
PICmicro
MCU
V
®
V
SS
DD
Microcon-
(ICSP)
®