TC1232CPA Microchip Technology, TC1232CPA Datasheet - Page 7

• Manufacturer Part Number: TC1232CPA
• Description: IC MPU MONITOR 4.5V 8-DIP
• Manufacturer: Microchip Technology
• Type: Simple Reset/Power-On Resetr

Specifications of TC1232CPA

• Number Of Voltages Monitored: 1
• Package / Case: 8-DIP (0.300", 7.62mm)
• Output: Open Drain or Open Collector
• Reset: Active High/Active Low
• Reset Timeout: 250 ms Minimum
• Voltage - Threshold: 4.37V, 4.62V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Chip Enable Signals: No
• Minimum Operating Temperature: 0 C
• Operating Supply Voltage: 5 V
• Operating Temperature Range: 0 C to + 70 C
• Output Type: Active High or Active Low or Open Drain or Push-Pull
• Power Fail Detection: Yes
• Monitored Voltage: 4.5 V to 4.75 V
• Undervoltage Threshold: 4.5 V or 4.25 V
• Overvoltage Threshold: 4.74 V or 4.49 V
• Manual Reset: Resettable
• Watchdog: Yes
• Battery Backup Switching: No
• Power-up Reset Delay (typ): 1000 ms
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4 V
• Supply Current (typ): 200 uA
• Mounting Style: Through Hole
• Maximum Operating Temperature: + 70 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 158-1042; 158-1042

4.0
4.1
The TC1232 provides the function of warning the
processor of a power failure. When V
being below the voltage levels defined by the TOL pin,
the TC1232’s comparator outputs the RST and RST
signals to a logic level that warns the system of an out-
of-tolerance power supply. The RST and RST signals
switch at a threshold value of 4.5V if TOL is tied to V
and at a value of 4.75 volts if TOL is grounded. The
RST and RST signals are held active for a minimum of
250 ms to ensure that the power supply voltage has
been stabilized.
Figure 4-1 shows the V
Figure 4-2 shows the V
Figure 4-3 shows the time from when the voltage trip
point is detected to the reset output pin going active.
Figure 4-4 shows the time from when the voltage trip
point is exited to the reset output pin going inactive.
FIGURE 4-1:
FIGURE 4-2:
© 2005 Microchip Technology Inc.
V
V
CC
CC
OPERATIONAL DESCRIPTION
Power Monitor
+4.75V
+4.25V
Power-Down Slew Rate.
Power-up Slew Rate.
CC
CC
t
F
fall time.
rise time.
t
R
+4.25V
+4.75V
CC
is detected as
Preliminary
CC
,
FIGURE 4-3:
Delay (Power-Down).
FIGURE 4-4:
Delay (Power-Up).
V
RST
RST
V
V
RST
RST
CC
CC
CC
= 5V
SLEW RATE = 1.66 mV/µs (0.5V/300 µs)
V
V
CC
CC
+4.5V (5% Trip Point)
4.5V(10% Trip Point)
Detect Reset Output
Detect Reset Output
4.6V (5% Trip Point)
+4.25V (10% Trip Point)
TC1232
V
V
DS21370C-page 7
OH
OL
V
V
OH
OL
t
RPD
t
RPU