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MITSUBISHI<Dig./Ana.INTERFACE>
M62050P,FP
3V supply SYSTEM RESET with watchdog timer
GENERAL DESCRIPTION
M62050P/FP is a voltage threshold detector designed for detection
of 3V supply voltage and generation of a system reset pulse. It is
suitable for microcontroller systems.
The IC, a supervisor of the MCU operations, dissipates low current
of 0.6mA (typ) during normal operations of the MCU systems.
It has 2 selectable threshold voltages, which allows applying it to a
high precision system design.
FEATURES
• Watchdog timer (supervisor for 2 system voltages)
• Power-on reset timer
• Low current consumption 0.6mA (typ) at Vcc = 3V
• Wide supply voltage range Vcc = 7V (max)
APPLICATION
• Supervisor for microcontroller systems
RECOMMENDED OPERATING CONDITION
• Supply voltage range
2V ~ 4V
PIN CONFIGURATION(TOP VIEW)
WD 1
TC 2
RST1 3
GND 4
8 ADJ
7 RST2
6 Vcc
5 ct1
OUTLINE
8P4(P)
8P2S-A(FP)
BLOCK DIAGRAM
F•F
F•F
W•D•T
F•F
1.24V
REFERENCE
VOLTAGE
CIRCUIT
123
4
WD TC RST1 GND
(1/4)
5
ct1
67 8
Vcc RST2 ADJ
1995-12-6

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MITSUBISHI<Dig./Ana.INTERFACE>
M62050P,FP
3V supply SYSTEM RESET with watchdog timer
Terminal functional description
PIN No. symbol
Terminal functional description
1 W D Input for watchdog timer
2 T C Time set for reset timer and watchdog timer
3
RST1
When abnormal signaling is input into WD terminal, it
generates reset signal.
4 GND GND
5 ct1 Detection voltage adjustment for WD input
6 Vcc Power supply
7
RST2
When power supply voltage became abnormal, it generates
reset signal.
8 ADJ Selection between 2 detection voltages
ABSOLUTE MAXIMUM RATING
symbol
Parameter
VCC Power supply voltage
VIN Input voltage
VOUT Output voltage
IOUT Output current
Pd Internal power dissipation
KO
Topr
Heat reduction rate
Operating ambient temperature
Tstg Storage temperature
Ratings
15
-0.3 ~ 5
15
10
625
4.40
-20 ~ +75
-55 ~ +125
Units
V
V
V
mA
mW
mW/°C
°C
°C
(2/4)

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MITSUBISHI<Dig./Ana.INTERFACE>
M62050P,FP
3V supply SYSTEM RESET with watchdog timer
ELECTRICAL CHARACTERISTIC (Ta=25 °C, VCC=3V, unless otherwise noted)
(1) DC characteristics
Symbol
Parameter
Measurement condition
Terminal
Ratings
MIN TYP
MAX
Unit
IWD WD input current
WD VIN=3V
0.06 0.15 0.25 mA
VIH
WD input voltage
VIL
WD
1.5 3.00 V
-0.3 0.80 V
IOUT TC output current
TC VIN=0.9V
-0.10 µA
IIN TC input current
TC VOUT=2.5V
2.50
mA
VTH3(H) Watchdog timer
VTH3(L) threshold voltage
TC
2.00
1.00
V
V
VOL Output voltage
Ileak Output leakage current
VTH1(H)
RST1 IOUT=1mA
RST2 VOUT=4V
0.20 0.50 V
5.00 µA
2.13 2.25 2.38 V
VTH1(L) Vcc detection voltage(1) VCC1
2.10 2.20 2.30 V
TH1
VTH2(H)
VTH2(L) Vcc detection voltage(2)
VTH2
ADJ Terminal=OPEN
ADJ Terminal=Vcc
VCC2 ADJ Terminal=OPEN
ADJ Terminal=Vcc
0.03 0.05 0.08
2.43 2.55 2.68
2.40 2.50 2.60
V
V
V
0.03 0.05 0.08 V
RST1 RST1 ON voltage
RST1 VCC=1.2V,RL=3k
0.5 V
RST2 RST2 ON voltage
ICC Circuit current
RST2 VCC=1.2V,RL=3k
VCC
0.5 V
0.5 1.0 mA
(2) AC characteristics
Symbol
Parameter
TWD Watchdog timer
tRST(1) Reset Timer(1)
tRST(2) Reset Timer(2)
tWDIN
td1
td2
Input pulse duration
Propagation delay
Measurement condition
Terminal
RST1 C=0.1µF,R1=10k
RST1
C=0.1µF,R1=10k
RST1 R1=10k
C=0.1µF,R1=10k
WD
RST1
RST2
Ratings
Unit
MIN TYP MAX
1.1CR1
s
0.5 1.1 1.7 ms
0.5CR1
s
0.2 0.50 1.1 ms
830C
s
40 83 220 µs
3 µs
10 µs
5 µs
( 3/4)