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| MITSUBISHI 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 TC RST1 GND 1 2 3 4 8 ADJ 7 RST2 6 Vcc 5 ct1 M62050P,FP OUTLINE 8P4(P) 8P2S-A(FP) BLOCK DIAGRAM F*F F*F W*D*T F*F 1.24V REFERENCE VOLTAGE CIRCUIT 1 WD 2 TC 3 RST1 4 GND 5 ct1 6 Vcc 7 RST2 8 ADJ (1/4) 1995-12-6 MITSUBISHI M62050P,FP 3V supply SYSTEM RESET with watchdog timer Terminal functional description PIN No. 1 2 3 4 5 6 7 8 symbol WD TC RST1 GND ct1 Vcc RST2 ADJ Terminal functional description Input for watchdog timer Time set for reset timer and watchdog timer When abnormal signaling is input into WD terminal, it generates reset signal. GND Detection voltage adjustment for WD input Power supply When power supply voltage became abnormal, it generates reset signal. Selection between 2 detection voltages ABSOLUTE MAXIMUM RATING symbol VCC VIN VOUT IOUT Pd KO Topr Tstg Parameter Power supply voltage Input voltage Output voltage Output current Internal power dissipation Heat reduction rate Operating ambient temperature Storage temperature Ratings Units 15 -0.3 ~ 5 15 10 625 4.40 -20 ~ +75 -55 ~ +125 V V V mA mW mW/C C C (2/4) MITSUBISHI M62050P,FP 3V supply SYSTEM RESET with watchdog timer ELECTRICAL CHARACTERISTIC (Ta=25 C, VCC=3V, unless otherwise noted) (1) DC characteristics Symbol Parameter Terminal Measurement condition MIN Ratings Unit TYP MAX IWD VIH VIL IOUT IIN WD input current WD input voltage TC output current TC input current WD WD TC TC TC VIN=3V 0.06 0.15 0.25 mA 1.5 -0.3 3.00 0.80 2.50 2.00 1.00 0.20 0.50 2.13 2.25 2.38 V V VIN=0.9V VOUT=2.5V -0.10 A mA V V V VTH3(H) Watchdog timer VTH3(L) threshold voltage VOL Ileak VTH1(H) VTH1(L) Vcc detection voltage(1) TH1 VTH2(H) VTH2(L) Vcc detection voltage(2) VTH2 RST1 RST2 ICC RST1 ON voltage RST2 ON voltage Circuit current Output voltage Output leakage current RST1 IOUT=1mA RST2 VOUT=4V VCC1 ADJ Terminal=OPEN ADJ Terminal=Vcc ADJ Terminal=OPEN ADJ Terminal=Vcc 5.00 A V V V V V V V V 2.10 2.20 2.30 0.03 0.05 0.08 2.43 2.55 2.68 2.40 2.50 2.60 0.03 0.05 0.08 VCC2 RST1 VCC=1.2V,RL=3k RST2 VCC=1.2V,RL=3k VCC 0.5 0.5 0.5 1.0 mA (2) AC characteristics Symbol Parameter Terminal Measurement condition MIN Ratings Unit TYP MAX 1.1CR1 TWD Watchdog timer RST1 RST1 RST1 WD RST1 RST2 s C=0.1F,R1=10k C=0.1F,R1=10k R1=10k C=0.1F,R1=10k 0.5 1.1 0.5CR1 1.7 ms s tRST(1) Reset Timer(1) tRST(2) Reset Timer(2) tWDIN td1 td2 Input pulse duration Propagation delay 0.2 0.50 830C 1.1 ms s s 40 3 83 220 s 10 5 s s ( 3/4) MITSUBISHI M62050P,FP 3V supply SYSTEM RESET with watchdog timer Timing chart VTH2(H) VTH1 VTH2(L) VTH1 VCC 0V VTH3(H) TC VTH3(H) 0V VIN 0V RST1 0V RST2 0V tRST(1) tWD tRST(2) Application circuitry example 8 7 6 5 M62050 1 2 3 4 CLOCK RST1 (RESET) RST2 (HOLD) MCU/MPU VDD (4 /4) |
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