603-00002 Parallax Inc, 603-00002 Datasheet - Page 6

• Manufacturer Part Number: 603-00002
• Description: IC BROWNOUT DETECTOR 3.8V 3-SIP
• Manufacturer: Parallax Inc
• Type: Simple Reset/Power-On Resetr

Specifications of 603-00002

• Number Of Voltages Monitored: 1
• Voltage - Threshold: 4.2V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: TO-92-3 (Standard Body), TO-226
• Product: Microcontroller Accessories
• Operating Supply Voltage: 0.7 V to 10 V
• Board Size: 18.7 mm x 4.7 mm x 3.6 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output: -
• Reset: -
• Reset Timeout: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

TC54
4.0
4.1
Although the TC54 has a pre-programmed V
sometimes necessary to make adjustments during pro-
totyping. This can be accomplished by connecting an
external resistor divider to a TC54, which has a V
lower than that of V
To maintain detector accuracy, the bleeder current
through the divider should be significantly higher than
the 1 µA operating current required by the TC54. A
reasonable value for this bleeder current is 100 µA (100
times the 1 µA required by the TC54). For example, if
V
of R
can be rounded to the nearest standard value and
plugged into the equation of Figure 4-1 to calculate
values for R
recommended.
FIGURE 4-1:
using external resistor divider.
DS21434G-page 6
DET
1
Where:
Note:
+ R
– = 2V and the desired trip point is 2.5V, the value
R
R
V
V
SOURCE
(V
SOURCE
2
1
APPLICATIONS INFORMATION
Modifying The Trip Point, V
2
DET
is 25 k (2.5V/100 µA). The value of R
V
SOURCE
In this example, V
greater than (V
1
– ) = Threshold Voltage setting of TC54
V
and R
= Voltage to be monitored
IN
SOURCE
=
Modify trip-point of the TC54
2
V
. 1% tolerance resistors are
SS
------------------- -
R 1
TC54
R
(Figure 4-1).
+
DET
1
R 2
– )
=
SOURCE
V
DET
V
OUT
-
must be
DET
DET
1
– , it is
DET
–
+ R
–
2
4.2
Low operating power and small physical size make the
TC54 series ideal for many voltage detector applica-
tions, such as those shown in Figures 4-2, 4-3 and 4-4.
Figure 4-2 shows a low-voltage gate drive protection
circuit that prevents overheating of the logic-level
MOSFET due to insufficient gate voltage. When the
input signal is below the threshold of the TC54VN, its
output grounds the gate of the MOSFET. Figure 4-3 and
Figure 4-4 show the TC54 in conventional voltage
monitoring applications.
FIGURE 4-2:
Protection.
FIGURE 4-3:
FIGURE 4-4:
Pwr
Sply
+
–
+
– –
Other Applications
TC54VX
4.3V
V
TC54VX
V
TC54VX
V
IN
V
SS
SS
IN
270
V
V
IN
SS
MOSFET Low Drive
Battery Voltage Monitor.
Power Good Monitor.
 2004 Microchip Technology Inc.
V
OUT
V
V
OUT
OUT
V
CC
MTP3055EL
R
Power Good
L
BATLOW