R5106N SERIES Microprocessor Supervisory Circuit with Inhibit pin NO.EA-169-151222 OUTLINE The R5106N is a microprocessor supervisory circuit and has 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 microprocessor, the reset output is generated. The voltage detector circuit is used for the system reset, etc. The detector threshold is fixed internally, and the accuracy is 1.0%. The released delay time (Power-on Reset Delay) circuit is built-in, and output delay time is adjustable with an external capacitor, and the accuracy is 16%(1). When the supply voltage becomes higher than the released voltage, the reset state will be maintained during the delay time. The output type of the reset is selectable, Nch open-drain, or CMOS. The time out period of the watchdog timer can be also set with an external capacitor, and the accuracy is 33%(1). There is a function to stop supervising clock by the watchdog timer (INH function). There are another 4 products by the difference of packages and the function of voltage detector and watchdog timer. The package of R5106N is SOT-23-6. FEATURES * Supply Current (ISS) ............................................................... Typ. 11A * Operating Voltage Range (VDD)............................................. 0.9V to 6.0V < Voltage Detector Part > * Detector Threshold Range .................................................... 1.5V to 5.5V (0.1V steps) * Detector Threshold Accuracy ................................................ 1.0% * Power-on Reset Delay Time accuracy .................................. 16%(1) (-40C Ta 105C) * Power-on reset delay time of the voltage detector ............... Typ. 370ms with an external capacitor : 0.1F < Watchdog Timer Part > * Built-in a watchdog timer's time out period accuracy............ 33%(1) (-40C Ta 105C) * Timeout period for watchdog timer ....................................... Typ. 310ms with an external capacitor : 0.1F * Reset timer for watchdog timer ............................................. Typ. 34ms with an external capacitor : 0.1F * With Inhibit pin (INH) ............................................................. Able to stop watchdog timer * Package ................................................................................ SOT-23-6 APPLICATIONS * Supervisory circuit for equipment with using microprocessors. (1) Accuracy to center value of (Min.+Max.)/2 1 R5106N NO.EA-169-151222 SELECTION GUIDE The detector threshold, the output type and the taping type for the ICs can be selected at the users' request. The selection can be made with designating the part number as shown below; Product Name R5106Nxx1-TR-FE Package Quantity per Reel Pb Free Halogen Free SOT-23-6 3,000 pcs Yes Yes xx : The detector threshold (-VDET) can be designated in the range from 1.5V(15) to 5.5V(55) in 0.1V steps. : Designation of Output Type (A) Nch Open Drain (C) CMOS Series Selection R5105N Package With INH pin (Inhibit) R5106N 2 R5108G SOT-23-6 R5109G SSOP-8G No Yes 2 clock input With MR pin (Manual Reset) R5107G No No Yes Yes With SENSE pin No Remarks CD pin and CTW pin are combined uses. No Yes No Operating Supply Current Voltage Range 11.5A 1.5V to 6.0V R5106N NO.EA-169-151222 BLOCK DIAGRAMS R5106Nxx1A (Nch Open Drain Output) R5106Nxx1C (CMOS Output) VDD 3 VDD 3 SW1 SW1 Vref2 CT 6 SW2 WATCHDOG TIMER Vref2 Vref1 5 GND CLOCK DETECTOR 6 SW2 1 SCK RESETB 4 WATCHDOG TIMER Vref1 CLOCK DETECTOR RESETB 4 2 INH SW1: "L"=ON, CT 5 GND 1 SCK 2 INH SW2: "H"=ON PIN DESCRIPTIONS * SOT-23-6 6 5 4 (mark side) 1 * 2 3 SOT-23-6 Pin No. Symbol Description 1 SCK Clock Input Pin from Microprocessor 2 INH Inhibit Pin ("L": Inhibit the watchdog timer) 3 VDD Power supply Pin 4 RESETB 5 GND 6 CT 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 Reset and Watchdog Timeout Periods and delay time of Voltage Detector 3 R5106N NO.EA-169-151222 ABSOLUTE MAXIMUM RATINGS Symbol VDD VCT VRESETB VSCK VINH IRESETB Item Supply Voltage Output Voltage Input Voltage Output Current Rating (Ta=25C) Unit -0.3 to 7.0 V -0.3 to VDD + 0.3 V Voltage of RESETB Pin -0.3 to 7.0 V Voltage of SCK Pin -0.3 to 7.0 V Voltage of INH Pin -0.3 to 7.0 V 20 mA 420 mW Voltage of CT Pin Current of RESETB Pin PD Power Dissipation(1) (SOT-23-6) Tj Junction Temperature -40 to 125 C Storage Temperature Range -55 to 125 C Tstg ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings are not assured. RECOMMENDED OPERATING CONDITIONS Symbol Item Rating Unit VDD Operating Voltage 0.9 to 6.0 V Ta Operating Temperature Range -40 to 105 C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such ratings by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. (1) 4 Refer to POWER DISSIPATION for detailed information. R5106N NO.EA-169-151222 ELECTRICAL CHARACTERISTICS VDD=6.0V, CT=0.1F, In case of Nch Open Drain Output type, the output pin is pulled up with a resistance of 100k (R5106Nxx1A), unless otherwise noted. The specification in is checked and guaranteed by design engineering at -40C Ta 105C. (Ta=25C) R5106Nxx1A/C Symbol ISS Item Supply Current Conditions Min. VDD= -VDET+0.5V, Clock pulse input Typ. Max. Unit 11 15 A Typ. Max. Unit VD Part Symbol -VDET Item Detector Threshold -VDET Detector Threshold /Ta Temperature Coefficient VHYS Detector Threshold Hysteresis tPLH Output Delay Time IRESETB Output Current (RESETB Output pin) Conditions Min. Ta=25C x0.990 x1.010 -40C Ta 105C x0.972 x1.015 -40C Ta 105C CT=0.1F ( 1) V ppm /C 100 -VDET x0.03 -VDET x0.05 -VDET x0.07 V 340 370 467 ms Nch VDD=1.2V, VDS=0.1V 0.38 0.8 mA Pch (2) VDD=6.0V, VDS=0.5V 0.65 0.9 mA Conditions Min. Typ. Max. Unit 230 310 450 ms 29 34 48 ms WDT Part Symbol Item tWD Watchdog Timeout period CT=0.1F tWR Reset Hold Time of WDT CT=0.1F (1) (1) VSCKH SCK Input "H" VDDx0.8 6.0 V VSCKL SCK Input "L" 0 VDDx0.2 V VINHH INH Input "H" 1.0 6.0 V VINHL INH Input "L" 0 0.35 V RINH INH pull-up Resistance 60 164 k tSCKW SCK Input Pulse Width VSCKL=VDDx0.2 VSCKH=VDDx0.8 110 500 ns All test items listed under Electrical Characteristics are done under the pulse load condition (Tj Ta = 25C) except for Detector Threshold Temperature Coefficient. (1) (2) The specification does not contain the temperature characteristics of the external capacitor. In case of CMOS type (R5105Nxx1C) 5 R5106N NO.EA-169-151222 Product-specific Electrical Characteristics -VDET Product Name R5106N151x R5106N161x R5106N171x R5106N181x R5106N191x R5106N201x R5106N211x R5106N221x R5106N231x R5106N241x R5106N251x R5106N261x R5106N271x R5106N281x R5106N291x R5106N301x R5106N311x R5106N321x R5106N331x R5106N341x R5106N351x R5106N361x R5106N371x R5106N381x R5106N391x R5106N401x R5106N411x R5106N421x R5106N431x R5106N441x R5106N451x R5106N461x R5106N471x R5106N481x R5106N491x R5106N501x R5106N511x R5106N521x R5106N531x R5106N541x R5106N551x 6 Min. 1.485 1.584 1.683 1.782 1.881 1.980 2.079 2.178 2.277 2.376 2.475 2.574 2.673 2.772 2.871 2.970 3.069 3.168 3.267 3.366 3.465 3.564 3.663 3.762 3.861 3.960 4.059 4.158 4.257 4.356 4.455 4.554 4.653 4.752 4.851 4.950 5.049 5.148 5.247 5.346 5.445 Ta = 25C Typ. 1.500 1.600 1.700 1.800 1.900 2.000 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 3.100 3.200 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 4.100 4.200 4.300 4.400 4.500 4.600 4.700 4.800 4.900 5.000 5.100 5.200 5.300 5.400 5.500 Max. 1.515 1.616 1.717 1.818 1.919 2.020 2.121 2.222 2.323 2.424 2.525 2.626 2.727 2.828 2.929 3.030 3.131 3.232 3.333 3.434 3.535 3.636 3.737 3.838 3.939 4.040 4.141 4.242 4.343 4.444 4.545 4.646 4.747 4.848 4.949 5.050 5.151 5.252 5.353 5.454 5.555 -40C Ta 105 C Min. Typ. Max. 1.4580 1.5225 1.500 1.5552 1.6240 1.600 1.6524 1.7255 1.700 1.7496 1.8270 1.800 1.8468 1.9285 1.900 1.9440 2.0300 2.000 2.0412 2.1315 2.100 2.1384 2.2330 2.200 2.2356 2.3345 2.300 2.3328 2.4360 2.400 2.4300 2.5375 2.500 2.5272 2.6390 2.600 2.6244 2.7405 2.700 2.7216 2.8420 2.800 2.8188 2.9435 2.900 2.9160 3.0450 3.000 3.0132 3.1465 3.100 3.1104 3.2480 3.200 3.2076 3.3495 3.300 3.3048 3.4510 3.400 3.4020 3.5525 3.500 3.4992 3.6540 3.600 3.5964 3.7555 3.700 3.6936 3.8570 3.800 3.7908 3.9585 3.900 3.8880 4.0600 4.000 3.9852 4.1615 4.100 4.0824 4.2630 4.200 4.1796 4.3645 4.300 4.2768 4.4660 4.400 4.3740 4.5675 4.500 4.4712 4.6690 4.600 4.5684 4.7705 4.700 4.6656 4.8720 4.800 4.7628 4.9735 4.900 4.8600 5.0750 5.000 4.9572 5.1765 5.100 5.0544 5.2780 5.200 5.1516 5.3795 5.300 5.2488 5.4810 5.400 5.3460 5.5825 5.500 VHYS Max. 0.045 0.048 0.051 0.054 0.057 0.060 0.063 0.066 0.069 0.072 0.075 0.078 0.081 0.084 0.087 0.090 0.093 0.096 0.099 0.102 0.105 0.108 0.111 0.114 0.117 0.120 0.123 0.126 0.129 0.132 0.135 0.138 0.141 0.144 0.147 0.150 0.153 0.156 0.159 0.162 0.165 Typ. 0.075 0.080 0.085 0.090 0.095 0.100 0.105 0.110 0.115 0.120 0.125 0.130 0.135 0.140 0.145 0.150 0.155 0.160 0.165 0.170 0.175 0.180 0.185 0.190 0.195 0.200 0.205 0.210 0.215 0.220 0.225 0.230 0.235 0.240 0.245 0.250 0.255 0.260 0.265 0.270 0.275 Max. 0.105 0.112 0.119 0.126 0.133 0.140 0.147 0.154 0.161 0.168 0.175 0.182 0.189 0.196 0.203 0.210 0.217 0.224 0.231 0.238 0.245 0.252 0.259 0.266 0.273 0.280 0.287 0.294 0.301 0.308 0.315 0.322 0.329 0.336 0.343 0.350 0.357 0.364 0.371 0.378 0.385 R5106N NO.EA-169-151222 THEORY OF OPERATION Timing Chart VDD +VDET -VDET VDDL VINH tWD tPLH tWDI Vref2H VCT Vref2L tPHL VSCK tWR tPLH VRESETB Undefined (1) (2) (3) (4) (5) (6) (7) Undefined ) Vref2H : CT pin voltage at the end of WDT timeout period. ) Vref2L : CT pin voltage at the begin of WDT timeout period. 7 R5106N NO.EA-169-151222 Operating Description (1) When the power supply, VDD pin voltage becomes more than the released voltage (+VDET), after the released delay time (or the power on reset time tPLH), the output of RESETB becomes "H" level. (2) When the SCK pulse is input, the watchdog timer (WDT) is cleared, and CT pin mode changes from the discharge mode to the charge mode. When the CT pin voltage becomes higher than Vref2H, the mode will change into the discharge mode, and next watchdog time count starts. (3) Unless the SCK pulse is input, WDT will not be cleared, and during the charging period of CT pin, RESETB="L". (4) When the VDD pin becomes lower than the detector threshold voltage (-VDET), RESETB outputs "L". (5) If "L" signal is input to the INH pin, the RESETB outputs "H", regardless the SCK clock state. (6) During the "L" period of INH pin, the voltage detector monitors the supply voltage. (7) When the signal to the INH pin is set from "L" to "H", the watchdog starts supervising the system clock, or charge cycle to the CT pin starts, the capacitor connected to the CT pin is charged with the current of setting Reset time of WDT. Watchdog Timeout period/Reset hold time The watchdog timeout period and reset hold time can be set with an external capacitor to CT pin. The next equations describe the relation between the watchdog timeout period and the external capacitor value, or the reset hold time and the external capacitor value. tWD (s) = 3.1x106xC (F) tWR (s) = tWD/9 The watchdog timer (WDT) timeout period is determined with the discharge time of the external capacitor. During the watchdog timeout period, if the clock pulse from the system is detected, WDT is cleared and the capacitor is charged. When the charge of the capacitor completes, another watchdog timeout period starts again. During the watchdog timeout period, if the clock pulse from the system is not detected, during the next reset hold time RESETB pin outputs "L". During the reset time, (while charging the external capacitor) and after starting the watchdog timeout period, (just after from the discharge of the external capacitor) even if the clock pulse is input during the time period "tWDI", the clock pulse is ignored. tWDI (s) = tWD/10 Released Delay Time (Power-on Reset delay time) The released delay time can be set with an external capacitor connected to the CT pin. The next equation describes the relation between the capacitance value and the released delay time (tPLH). tPLH (s) =3.7x106x C (F) The capacitor connected to CT pin determines tWD, tWR, and tPLH. When the VDD voltage becomes equal or less than (-VDET), discharge of the capacitor connected to the CT pin starts. Therefore, if the discharge is not enough and VDD voltage returns to (+VDET) or more, thereafter the delay time will be shorter than tPLH which is expected. 8 R5106N NO.EA-169-151222 Power on Reset Operation against the input glitch (tPLH1 < tPLH) VDD +VDET -VDET 0V VCT Complete Discharge +VTCT -VTCT 0V Incomplete Discharge VRESETB 0V tPHL tPLH1 tPHL tPLH Minimum Operating Voltage We specified the minimum operating voltage as the minimum input voltage in which the condition of RESETB pin being 0.1V or lower than 0.1V. (Herein, pull-up resistance is set as 100k in the case of the Nch opendrain output type.) Inhibit (INH) Function If INH pin is set at "L", the watchdog timer stops monitoring the clock, and the RESETB output will be dominant by the voltage detector's operation. Therefore, if the supply voltage is set at more than the detector threshold level, RESETB outputs "H" regardless the clock pulse. INH pin is pulled up with a resistor (TYP.110k) internally. RESETB Output RESETB pin's output type is selectable either the Nch open-drain output or CMOS output. If the Nch opendrain type output is selected, the RESETB pin is pulled up with an external resistor to an appropriate voltage source. Clock Pulse Input Built-in watchdog timer is cleared with the SCK clock pulse within the watchdog timeout period. 9 R5106N NO.EA-169-151222 APPLICATION INFORMATION Typical Applications Microprocessor Power Supply VDD R 3 VDD RESETB 4 R5106Nxx1A SCK SW 2 INH RESET 1 I/O CT 6 GND CT 5 R5106Nxx1A Power Supply Microprocessor VDD 3 VDD RESETB 4 R5106Nxx1C SCK SW 2 INH GND 1 I/O CT 6 5 R5106Nxx1C 10 RESET CT R5106N NO.EA-169-151222 TECHNICAL NOTES When connecting resistors to the device's input pin When connecting a resistor (R1) to an input of this device, the input voltage decreases by [Device's Consumption Current] x [Resistance Value] only. And, the cross conduction current(1), which occurs when changing from the detecting state to the release state, is decreased the input voltage by [Cross Conduction Current] x [Resistance Value] only. And then, this device will enter the re-detecting state if the input voltage reduction is larger than the difference between the detector voltage and the released voltage. When the input resistance value is large and the VDD is gone up at mildly in the vicinity of the released voltage, repeating the above operation may result in the occurrence of output. As shown in Figure A/B, set R1 to become 100k or less as a guide, and connect CIN(2) of 0.1F and more to between the input pin and GND. Besides, make evaluations including temperature properties under the actual usage condition, with using the evaluation board like this way. As result, make sure that the cross conduction current has no problem. R1 R1 VDD CIN (2 Voltage Detector VDD OUT pin R2 CIN(2 GND Figure A Voltage Detector OUT pin GND Figure B (1) In (2) the CMOS output type, a charging current for OUT pin is included. Note the bias dependence of capacitors. 11 R5106N NO.EA-169-151222 TYPICAL CHARACTERISTICS Note: Typical Characteristics are intended to be used as reference data; they are not guaranteed. 1) Supply Current vs. Input Voltage R510xx151x R510xx301x 2) Detector Threshold vs. Temperature R510xx151x R510xx421x 12 R510xx271x R5106N NO.EA-169-151222 3) Detector Threshold Hysteresis vs. Temperature R510xx151x R510xx271x R510xx421x 4) Nch Driver Output Current vs. VDS R510xx 13 R5106N NO.EA-169-151222 5) Nch Driver Output Current vs. Input Voltage R510xx R510xx 6) Pch Driver Output Current vs. Input Voltage R510xx R510xx 14 R510xx R5106N NO.EA-169-151222 7) Released Delay Time vs. Input Voltage R510xx 8) Released Delay Time vs. Temperature R510xx 9) Detector Output Delay Time vs. Temperature 10) WDT Reset Timer vs. Temperature R510xx 11) WDT Timeout Period vs. Temperature R510xx R510xx 12) WDT Reset Timer vs. Input Voltage R510xx 15 R5106N NO.EA-169-151222 13) WDT Timeout Period vs. Input Voltage Capacitance R510xx 16 14) Output Delay Time vs. External R510xx POWER DISSIPATION SOT-23-6 Ver. A The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Measurement Conditions Standard Test Land Pattern Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Double-Sided Board) Board Dimensions 40 mm x 40 mm x 1.6 mm Top Side: Approx. 50% Copper Ratio Bottom Side: Approx. 50% Through-holes 0.5 mm x 44 pcs (Ta = 25C, Tjmax = 125C) Measurement Result Standard Test Land Pattern Free Air Power Dissipation 420 mW 250 mW Thermal Resistance ja = (125 - 25C) / 0.42 W = 238C/W 400C / W 40 500 Standard Test Land Pattern 420 400 300 40 Power Dissipation PD (mW) 600 Free Air 250 200 100 0 0 25 50 75 105 100 125 Ambient Temperature (C) Power Dissipation vs. Ambient Temperature 150 IC Mount Area (mm) Measurement Board Pattern i PACKAGE DIMENSIONS SOT-23-6 Ver. A 2.90.2 +0.2 1.1-0.1 1.90.2 4 1 2 0 to 0.1 0.2MIN. 5 +0.2 1.6-0.1 6 0.80.1 (0.95) 2.80.3 (0.95) 3 +0.1 0.4-0.2 +0.1 0.15-0.05 Unit : mm SOT-23-6 Package Dimensions (Unit: mm) i 1. The products and the product specifications described in this document are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to Ricoh sales representatives for the latest information thereon. 2. The materials in this document may not be copied or otherwise reproduced in whole or in part without prior written consent of Ricoh. 3. Please be sure to take any necessary formalities under relevant laws or regulations before exporting or otherwise taking out of your country the products or the technical information described herein. 4. The technical information described in this document shows typical characteristics of and example application circuits for the products. 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