MCP103T-475E/TT Microchip Technology, MCP103T-475E/TT Datasheet - Page 13

• Manufacturer Part Number: MCP103T-475E/TT
• Description: IC SUPERVISOR 4.63V LOW SOT-23B
• Manufacturer: Microchip Technology
• Type: Simple Reset/Power-On Resetr

Specifications of MCP103T-475E/TT

• Number Of Voltages Monitored: 1
• Output: Push-Pull, Totem Pole
• Reset: Active Low
• Reset Timeout: 80 ms Minimum
• Voltage - Threshold: 4.63V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3, TO-236-3, Micro3™, SSD3, SST3
• Threshold Voltage: 4.63V
• No. Of Supervisors / Monitors: 1
• Supply Voltage Range: 1V To 5.5V
• Reset Type: Active-Low
• Supply Current: 1µA
• Delay Time: 120ms
• Digital Ic Case Style: SOT-23
• No. Of Pins: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.2
The minimum pulse width (time) required to cause a
reset may be an important criteria in the implementa-
tion of a POR circuit. This time is referred to as
transient duration and is the amount of time needed for
these supervisory devices to respond to a drop in V
The transient duration time is dependant on the magni-
tude of V
duration decreases with increases in V
Figure 4-3 shows a typical transient duration vs. reset
comparator overdrive, for which the MCP102/103/121/
131 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 2-32 shows the transient response
characteristics for the MCP102/103/121/131.
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.
 2004 Microchip Technology Inc.
5V
0V
Negative Going V
TRIP
– V
DD
DD
t
TRANS
. Generally speaking, the transient
Time (µs)
pin, provides additional transient
Example of Typical
V
TRIP(MIN)
DD
Transients
- V
TRIP
DD
V
V
– V
TRIP(MAX)
TRIP(MIN)
DD
.
DD
.
4.3
Figure 4-4 illustrates the device current states. While
the system is powering down, the device has a low
current. This current is dependent on the device V
and trip point. When the device V
voltage trip point (V
timer consumes additional current until the RST pin is
driven (or released) high. This time is known as the
Reset Power-up Time (t
t
FIGURE 4-4:
Waveform.
4.3.1
The Reset Power-up timer time-out period (t
determines how long the device remains in the reset
condition. This is affected by both V
Typical responses for different V
temperatures are shown in Figures 2-26, 2-27 and
MCP102/103/121/131
RPU
2-28.
RST
V
DD
is active (device consuming additional current).
V
TRIP
See Figures 2-1,
Reset Power-up Timer (t
2-2 and 2-3
EFFECT OF TEMPERATURE ON
RESET POWER-UP TIMER (T
Reset Power-up
Timer Inactive
TRIP
Reset Power-up Timer
), an internal timer starts. This
RPU
See Figures 2-4,
2-5 and 2-6
). Figure 4-4 shows when
t
DD
RPU
DD
DS-21906A-page 13
See Figures 2-1,
rises through the
and temperature.
DD
2-2 and 2-3
RPU
Reset
Power-up
Timer
Inactive
values and
)
RPU
)
RPU
DD
)