R5105N RICOH Co.,Ltd., R5105N Datasheet
R5105N
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R5105N Summary of contents
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... R5105N SERIES OUTLINE The R5105N Series are CMOS-based µ con supervisory circuit, or high accuracy and ultra low supply current voltage detector with built-in delay circuit and watchdog timer. When the supply voltage is down across the threshold, or the watchdog timer does not detect the system clock from the The voltage detector circuit is used for the system reset, etc ...
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... R5105N BLOCK DIAGRAMS VDD CD TW RESETB VDD CD TW RESETB 2 R5105Nxx1A + - - + WATCHDOG CLOCK DETECTOR TIMER R5105Nxx1C + - - + CLOCK WATCHDOG DETECTOR TIMER GND SCK GND SCK ...
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... External Capacitor Pin for setting Reset and Watchdog Timer Timeout Period Power supply Pin Output Pin for Reset signal of Watchdog timer and Voltage Detector. (Output “L” at detecting Detector Threshold and Watchdog Timer Reset.) Ground Pin External Capacitor Pin for Setting delay time of Voltage Detector R5105N ) DET 3 ...
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... R5105N ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage Output Voltage RESETB V Input Voltage SCK I Output Current RESETB P Power Dissipation D Topt Operating Temperature Range Tstg Storage Temperature Range 4 Item Voltage of C Pin D Voltage of TW Pin Voltage of RESETB Pin Voltage of SCK Pin ...
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... DD DS (R5105NxxxC) Watchdog Timer C =0.1uF TW C =0.1uF x0.2, IN SCKL V =V x0.8 SCKH IN Power supply RESET P R5105NxxxC I/O Series R5105N Topt=25 C Min. Typ. Max. 0.9 6 x0.990 x1.010 x0.972 x1.015 100 (-V ) (-V ) (-V ) DET DET DET x0.03 x0.05 x0.07 340 370 467 0.38 0.80 0.65 0.90 230 310 ...
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... R5105N TEST CIRCUIT A V RESETB DD R5105NxxxA/C SCK Series GND C CD Supply Current Test Circuit 6 R(R5105NxxxA) Clock Input C TW ...
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... TIMING DIAGRAM (R5105NxxxA/R5105NxxxC) (Nch open-drain, RESETB pin is pulled up to VDD.) VDD C D VTC D TWD VrefH TW VrefL tpLH SCK (1) (2) tpHL TWDI tpLH TWR (3) (4) (1) R5105N tpHL 7 ...
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... R5105N OPERATION M When the power supply, V delay time (or the power on reset time tpLH), the output of RESETB becomes “H” level. N When the SCK pulse is input, the watchdog timer is cleared, and TW pin mode changes from the discharge mode to the charge mode. When the TW pin voltage becomes higher than VREFH, the mode will change into the discharge mode, and next watchdog time count starts ...
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... If a resistor is connected to the VDD pin, the operation might be unstable with the supply current of IC itself. VDD R1 VIN R5105 RESETB (tpLH1 < tpLH Complete Discharge tpLH tpLH1 VDD R1 VIN R2 R5105 RESETB Connection examples affected by the conduction current ) R5105 CMOS RESETB Output R5105N 9 ...
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... R5105N TYPICAL CHARACTERISTICS 1) Supply Current vs. Input Voltage R510xN151A/C, R510xG151A 105℃ 8 25℃ 6 -50℃ SUPPLY VOLTAGE [V] 2) Detector Threshold vs. Temperature R510xN151A/C, R510xG151A/C 1.530 1.520 1.510 1.500 1.490 1.480 1.470 -50 - TEMPERATURE [℃] R510xN421A/C R510xG421A/C 4 ...
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... TEMPERATURE [℃] 4) Nch Driver Output Current vs. V R510xN, R510xG 20 VDD=4.0V 18 VDD=6.0V 16 VDD=5.0V 14 VDD=3. 0.0 0.2 0.4 0.6 0.8 VDS [V] 7.0 6.0 5.0 4.0 3.0 75 100 125 -50 75 100 125 Topt= VDD=2.0V VDD=1.5V VDD=1.0V 1.0 1.2 1.4 R5105N R510xN271A/C R510xG271A/C - 100 TEMPERATURE [℃] 125 11 ...
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... R5105N 5) Nch Driver Output Current vs. V R510xN, R510xG SUPPLY VOLTAGE V 6) Pch Driver Output Current vs. V R510xN, R510xG 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 SUPPLY VOLTAGE [V] R510xN, R510xG 2.0 1.8 VDS=1.0V 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 SUPPLY VOLTAGE [ Vds=0.3V Topt=-40℃ 25℃ 105℃ ...
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... WDT Reset Timer vs. Input Voltage 100 125 1 R5105N R510xN, R510xG VDD= 100 125 150 TEMPERATURE [℃] R510xN, R510xG 100 TEMPERATURE [℃] R510xN, R510xG SUPPLY VOLTAGE [V] ...
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... R5105N 13) WDT Timeout Period vs. Input Voltage R510xN, R510xG 400 380 360 340 320 300 280 260 240 220 200 SUPPLY VOLTAGE [ ...