R3117xxx1/2 SERIES LOW VOLTAGE DETECTOR with SENSE pin NO.EA-186-160226 Notice If the SENSE pin voltage of R3117xxx1A/C and R3117Qxx2A/C make the gradual curve by raising 0.5V/ms or less, it may cause noise when the output voltage is switched from low to high. Please use R3117xxx3A/C and R3117Qxx4A/C Series for new designs instead of these products to avoid the above problem. OUTLINE The R3117x series are CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low supply current, which can be operated at an extremely low voltage and is used for system reset as an example. Each of these ICs consists of a voltage reference unit, a comparator, resistors for detector threshold setting, an output driver and a hysteresis circuit. The detector threshold is fixed with high accuracy internally and does not require any adjustment. The tolerance of the detector threshold is 15mV (-VDET < = 1.5V) or 1.0% (1.5V< -VDET). Since the sense pin is separated from the VDD pin of the IC, therefore, even if the sense pin voltage becomes to 0V, the output voltage keeps its "L" level. Two output types, Nch open drain type and CMOS type are available. Three types of packages, SOT-23-5, SC-88A, and DFN(PLP)1010-4 are available. FEATURES * Supply Current ...................................................................... Typ. 0.29A (VDD=6.0V) Consumption current through SENSE pin is not included. * Operating Voltage Range...................................................... 1.0V to 6.0V (-40C < = Topt < = 105C) * Detector Threshold Range .................................................... 0.7V to 5.0V (0.1V steps) (For other voltages, please refer to MARK INFORMATIONS.) * Accuracy Detector Threshold................................................ 1.0% (-VDET > = 1.6V), 15mV (-VDET<1.6V) * Temperature-Drift Coefficient of Detector Threshold ............ Typ. 30ppm/C * Output Types ......................................................................... Nch Open Drain and CMOS * Packages .............................................................................. DFN(PLP)1010-4, SC-88A, SOT-23-5 Topt=25C, unless otherwise noted. APPLICATIONS * * * * * * CPU and Logic Circuit Reset Battery Checker Window Comparator Wave Shaping Circuit Battery Back-up Circuit Power Failure Detector 1 R3117xxx1/2 BLOCK DIAGRAMS Nch Open Drain Output (R3117xxxxA) CMOS Output (R3117xxxxC) SENSE SENSE VDD DOUT VDD DOUT Vref Vref GND GND SELECTION GUIDE The package type, the detector threshold, the output type and the taping type for the ICs can be selected at the users' request. Product Name Package Quantity per Reel Pb Free Halogen Free DFN(PLP)1010-4 10,000 pcs Yes Yes R3117Qxx2-TR-FE SC-88A 3,000 pcs Yes Yes R3117Nxx1-TR-FE SOT-23-5 3,000 pcs Yes Yes R3117Kxx1-TR xx : The detector threshold can be designated in the range from 0.7V(07) to 5.0V(50) in 0.1V steps. (For other voltages, please refer to MARK INFORMATIONS.) : Designation of Output Type (A) Nch Open Drain (C) CMOS 2 R3117xxx1/2 PIN CONFIGURATIONS * DFNPLP1010-4*1 Bottom View Top View 4 * SC-88A 3 3 4 5 4 * SOT-23-5 5 (mark side) 1 2 2 1 1 2 3 4 (mark side) 1 2 3 PIN DESCRIPTIONS * DFN(PLP)1010-4*1 Pin No. Symbol 1 DOUT 2 SENSE 3 GND 4 VDD Description Output Pin ("L" at detection) Voltage Detector Voltage Sense Pin Ground Pin Input Pin 1) Tab is GND level. (They are connected to the reverse side of this IC.) The tab is better to be connected to the GND, but leaving it open is also acceptable. * SC-88A Pin No. Symbol Description 1 VDD Input Pin 2 NC No Connection*2 3 GND 4 SENSE 5 DOUT Ground Pin Voltage Detector Voltage Sense Pin Output Pin ("L" at detection) 2) In terms of NC pin of SC-88A, connect it to the GND or use it as open. * SOT-23-5 Pin No. Symbol Description 1 DOUT Output Pin ("L" at detection) 2 VDD Input Pin 3 GND 4 NC 5 SENSE Ground Pin No Connection Voltage Detector Voltage Sense Pin 3 R3117xxx1/2 ABSOLUTE MAXIMUM RATINGS Symbol Item VDD VSENSE Rating Unit Supply Voltage 7.0 V SENSE Pin Voltage 7.0 V Output Voltage (Nch Open Drain Output) VOUT VSS-0.3 to 7.0 Output Voltage (CMOS Output) IOUT V VSS-0.3 to VDD+0.3 Output Current 20 Power Dissipation (DFN(PLP)1010-4)* 400 Power Dissipation (SC-88A)* 380 Power Dissipation (SOT-23-5)* 420 Topt Operating Temperature Range -40 to 105 C Tstg Storage Temperature Range -55 to 125 C PD mA mW * ) For Power Dissipation, please refer to PACKAGE INFORMATION. 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 is not assured. ELECTRICAL CHARACTERISTICS * R3117xxxxA/C Symbol values indicate -40C Item 0.7V -VDET -VDET Detector Threshold (Topt=25C) 1.6V < = 0.7V < = ISS 4 Detector Threshold Hysteresis Supply Current*1 < = Topt < = 105C, unless otherwise noted. Topt=25C Conditions Min. Typ. Max. Unit < < 1.0V = VDD = 5.25V -VDET-15 -VDET+15 -VDET<1.6V mV 5.25V < VDD < 6.0V -V DET -11 -VDET+24 = -VDET < = 5.0V -VDET<1.6V Detector Threshold (-40C < = 105C) = Topt < 1.6V VHYS < = < = -VDET < = 5.0V VDD=1.0V to 6.0V 1.0V < = VDD < = 5.25V < VDD 1.0V < = VDD 1.0V < = VDD < = < = 5.25V < VDD 6.0V -VDET x0.99 -VDET x1.01 -VDET x0.9925 -VDET x1.016 5.25V -VDET-30 -VDET+30 6.0V -VDET-26 -VDET+39 5.25V -VDET x0.98 -VDET x1.02 6.0V -VDET x0.9825 -VDET x1.026 -VDET x0.04 -VDET x0.07 < = < = 5.25V < VDD 5.25V < = VSENSE=-VDET-0.1V 0.31 1.47 VSENSE=-VDETx1.1 0.29 1.25 V mV V V A R3117xxx1/2 Symbol RSENSE Item Sense Resistor Conditions Min. 6 1.5V < = -VDET < 4.7V 5 40 4.7V < = -VDET 10 40 VDD Operating Voltage -40C VDDL Minimum Operating Voltage*2 Topt=25C -40C < = < = Topt < = Output Current (Driver Output Pin) 0.55 Nch Driver Leakage Current*4 Detector Threshold -VDET/ Temperature Topt Coefficient ILEAK 1.1V < = -VDET < 1.6V 1.6V < = -VDET < 3.1V 3.1V < = -VDET -VDET < 4.0V Pch*3 6.0 105C 4.0V < = -VDET 7 VDD=0.6V VDS=0.5V VDD=1.0V VDS=0.5V VDD=1.5V VDS=0.5V VDD=3.0V VDS=0.5V VDD=4.5V VDS=2.1V VDD=6.0V VDS=2.1V < = tPHL Detector Output Delay Time*5 VDD=5V tPLH Release Output Delay Time*5 VDD=5V Topt < = 0.400 mA 1.000 2.400 0.650 mA 0.900 30 -VDET < 1.5V 80 1.5V -VDET 40 -VDET < 4.5V 40 4.5V 80 < = < = -VDET V 0.020 140 105C V A VDD=6.0V, VDS=7.0V -40C Unit M 0.50 Topt < = -VDET < 1.1V Nch Max. 25 1.0 105C VDD=0.6V, VDS=0.05V IOUT Typ. -VDET < 1.5V nA ppm /C s s All of unit are tested and specified under load conditions such that Topt=25C except for Detector Threshold Temperature Coefficient, Detector Output Delay Time and Release Output Delay Time. *1: Consumption current through SENSE pin is not included. *2: In case that the VDD pin and SENSE pin are connected and the value shows the minimum supply voltage (VDD) when the output voltage at detector threshold can be maintained as 0.1V or less. (In case of Nch open drain type, pull-up resistor is 470k and pull-up voltage is set at 5V for testing.) If VDD is high enough, down to 0V is acceptable for SENSE pin. *3: In case of CMOS type *4: In case of Nch Open Drain type *5: In the case of CMOS output type: Time interval from forcing pulsive 6.0V to -VDET-2.0V or 0V, or from forcing 0V to -VDET+2.0V or 6.0V to SENSE pin, to when the output voltage will reach VDD/2. In the case of Nch Open drain output type: Output pin is pulled up to 5V with 470k and time interval from forcing 6.0V to -VDET-2.0V or 0V, or forcing pulsive 0V to -VDET+2.0V or 6.0V to when the output voltage reaches up to 2.5V. RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS) 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 conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. 5 R3117xxx1/2 ELECTRICAL CHARACTERISTICS BY DETECTOR THRESHOLD * R3117x07xA/C to R3117x50xA/C Bold values are checked and guaranteed by design engineering at -40C < = Topt < = 105C, unless otherwise noted. Topt=25C Part Number R3117x07xA/C R3117x08xA/C R3117x09xA/C R3117x10xA/C R3117x11xA/C R3117x12xA/C R3117x13xA/C R3117x14xA/C R3117x15xA/C R3117x16xA/C R3117x17xA/C R3117x18xA/C R3117x19xA/C R3117x20xA/C R3117x21xA/C R3117x22xA/C R3117x23xA/C R3117x24xA/C R3117x25xA/C R3117x26xA/C R3117x27xA/C R3117x28xA/C R3117x29xA/C R3117x30xA/C R3117x31xA/C R3117x32xA/C R3117x33xA/C R3117x34xA/C R3117x35xA/C R3117x36xA/C R3117x37xA/C R3117x38xA/C R3117x39xA/C R3117x40xA/C R3117x41xA/C R3117x42xA/C R3117x43xA/C R3117x44xA/C R3117x45xA/C R3117x46xA/C R3117x47xA/C R3117x48xA/C R3117x49xA/C R3117x50xA/C 6 Detector Threshold Detector Threshold 1.0V < = 5.25V = VDD < = 5.25V 1.0V < = VDD < -VDET [V] Min. 0.6850 0.7850 0.8850 0.9850 1.0850 1.1850 1.2850 1.3850 1.4850 1.5840 1.6830 1.7820 1.8810 1.9800 2.0790 2.1780 2.2770 2.3760 2.4750 2.5740 2.6730 2.7720 2.8710 2.9700 3.0690 3.1680 3.2670 3.3660 3.4650 3.5640 3.6630 3.7620 3.8610 3.9600 4.0590 4.1580 4.2570 4.3560 4.4550 4.5540 4.6530 4.7520 4.8510 4.9500 Max. 0.7150 0.8150 0.9150 1.0150 1.1150 1.2150 1.3150 1.4150 1.5150 1.6160 1.7170 1.8180 1.9190 2.0200 2.1210 2.2220 2.3230 2.4240 2.5250 2.6260 2.7270 2.8280 2.9290 3.0300 3.1310 3.2320 3.3330 3.4340 3.5350 3.6360 3.7370 3.8380 3.9390 4.0400 4.1410 4.2420 4.3430 4.4440 4.5450 4.6460 4.7470 4.8480 4.9490 5.0500 -VDET [V] Min. 0.6700 0.7700 0.8700 0.9700 1.0700 1.1700 1.2700 1.3700 1.4700 1.5680 1.6660 1.7640 1.8620 1.9600 2.0580 2.1560 2.2540 2.3520 2.4500 2.5480 2.6460 2.7440 2.8420 2.9400 3.0380 3.1360 3.2340 3.3320 3.4300 3.5280 3.6260 3.7240 3.8220 3.9200 4.0180 4.1160 4.2140 4.3120 4.4100 4.5080 4.6060 4.7040 4.8020 4.9000 Max. 0.7300 0.8300 0.9300 1.0300 1.1300 1.2300 1.3300 1.4300 1.5300 1.6320 1.7340 1.8360 1.9380 2.0400 2.1420 2.2440 2.3460 2.4480 2.5500 2.6520 2.7540 2.8560 2.9580 3.0600 3.1620 3.2640 3.3660 3.4680 3.5700 3.6720 3.7740 3.8760 3.9780 4.0800 4.1820 4.2840 4.3860 4.4880 4.5900 4.6920 4.7940 4.8960 4.9980 5.1000 Detector Threshold 5.25V < VDD < = 6.0V Detector Threshold 5.25V < VDD < = 6.0V Detector Threshold Hysteresis -VDET [V] -VDET [V] VHYS [V] Min. 0.6890 0.7890 0.8890 0.9890 1.0890 1.1890 1.2890 1.3890 1.4890 1.5880 1.6872 1.7865 1.8857 1.9850 2.0842 2.1835 2.2827 2.3820 2.4812 2.5805 2.6797 2.7790 2.8782 2.9775 3.0767 3.1760 3.2752 3.3745 3.4737 3.5730 3.6722 3.7715 3.8707 3.9700 4.0692 4.1685 4.2677 4.3670 4.4662 4.5655 4.6647 4.7640 4.8632 4.9625 Max. 0.7240 0.8240 0.9240 1.0240 1.1240 1.2240 1.3240 1.4240 1.5240 1.6256 1.7272 1.8288 1.9304 2.0320 2.1336 2.2352 2.3368 2.4384 2.5400 2.6416 2.7432 2.8448 2.9464 3.0480 3.1496 3.2512 3.3528 3.4544 3.5560 3.6576 3.7592 3.8608 3.9624 4.0640 4.1656 4.2672 4.3688 4.4704 4.5720 4.6736 4.7752 4.8768 4.9784 5.0800 Min. 0.6740 0.7740 0.8740 0.9740 1.0740 1.1740 1.2740 1.3740 1.4740 1.5720 1.6702 1.7685 1.8667 1.9650 2.0632 2.1615 2.2597 2.3580 2.4562 2.5545 2.6527 2.7510 2.8492 2.9475 3.0457 3.1440 3.2422 3.3405 3.4387 3.5370 3.6352 3.7335 3.8317 3.9300 4.0282 4.1265 4.2247 4.3230 4.4212 4.5195 4.6177 4.7160 4.8142 4.9125 Max. 0.7390 0.8390 0.9390 1.0390 1.1390 1.2390 1.3390 1.4390 1.5390 1.6416 1.7442 1.8468 1.9494 2.0520 2.1546 2.2572 2.3598 2.4624 2.5650 2.6676 2.7702 2.8728 2.9754 3.0780 3.1806 3.2832 3.3858 3.4884 3.5910 3.6936 3.7962 3.8988 4.0014 4.1040 4.2066 4.3092 4.4118 4.5144 4.6170 4.7196 4.8222 4.9248 5.0274 5.1300 Min. 0.028 0.032 0.036 0.040 0.044 0.048 0.052 0.056 0.060 0.064 0.068 0.072 0.076 0.080 0.084 0.088 0.092 0.096 0.100 0.104 0.108 0.112 0.116 0.120 0.124 0.128 0.132 0.136 0.140 0.144 0.148 0.152 0.156 0.160 0.164 0.168 0.172 0.176 0.180 0.184 0.188 0.192 0.196 0.200 Max. 0.049 0.056 0.063 0.070 0.077 0.084 0.091 0.098 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 R3117xxx1/2 ELECTRICAL CHARACTERISTICS BY DETECTOR THRESHOLD * R3117x07xA/C to R3117x50xA/C are checked and guaranteed by design engineering at -40CTopt105C, unless otherwise noted. Sense Resistor RSENSE [M] Min. Typ. Nch Driver Output Current 1 IOUT1 [A] Cond. Nch Driver Output Current2 IOUT2 [mA] Min. Cond. VDD= 0.6V 6 VDS= 0.5V 25 VDD= 1.0V VDS= 0.5V Min. Pch Driver Output Current IOUT3 [mA] Cond. Min. 0.020 Topt=25C Detector Output Delay Time Release Output Delay Time tPHL [s] tPLH [s] Cond. Typ. VDD= 5.0V 80 Cond. Typ. VSENSE= 6.0V 0V 0.400 Note) VDD= 1.5V VDS= 0.5V VDD= 0.6V VDS= 0.05V VDD= 4.5V 1.000 VDS= 2.1V VDD= 5.0V VSENSE= 0V -VDET +2.0V 0.650 40 Note) 7 5 VDD= 5.0V 40 VSENSE= 6.0V -VDET -2.0V VDD= 3.0V VDS= 0.5V 40 Note) 2.400 VDD= 6.0V VDS= 2.1V VDD= 5.0V 0.900 VSENSE= 0V 6.0V 10 80 Note) Note) 1. In the case of CMOS output type: Time interval from forcing pulsive 6.0V to -VDET-2.0V or 0V, or from forcing 0V to -VDET+2.0V or 6.0V to SENSE pin, to when the output voltage will reach VDD/2. 2. In the case of Nch Open drain output type: Output pin is pulled up to 5V with 470k and time interval from forcing 6.0V to -VDET-2.0V or 0V, or forcing pulsive 0V to -VDET+2.0V or 6.0V to when the output voltage reaches up to 2.5V. 7 R3117xxx1/2 TIMING CHART Supply Voltage (VDD) Minimum Operating VDDL Voltage Released Voltage +VDET Detector Threshold -VDET Detector Threshold Hysteresis Detector Threshold Hysteresis SENSE Pin Voltage (VSENSE) GND Pull-up Voltage Supply Voltage (VDD) Output Voltage (VOUT) GND tPHL R3117xxxxA tPLH tPHL R3117xxxxC tPLH If the SENSE pin voltage is raised 0.5V/ms or less, it may cause noise when the output voltage is switched from low to high. DEFINITION OF OUTPUT DELAY TIME Output Delay Time (tPLH) is defined as follows: 1. In the case of Nch Open Drain Output: Under the condition of the output pin (DOUT) is pulled up through a resistor of 470k to 5V, the time interval between the rising edge of SENSE Pin pulse from 0V to (-VDET)+2.0V or the time interval of 6.0V pulse voltage is supplied, the becoming of the output voltage to 2.5V. 2. In the case of CMOS Output: The time interval between the rising edge of SENSE Pin pulse from 0V to (-VDET)+2.0V or the time interval of 6.0V pulse voltage is supplied, the becoming of the output voltage to VDD/2. Supply Voltage (VDD) Supply Voltage (VDD) Minimum Operating Voltage VDDL Minimum Operating VDDL Voltage -VDET+2.0V or 6.0V -VDET+2.0V or 6.0V SENSE Pin Voltage (VSENSE) SENSE Pin Voltage (VSENSE) 5.0V GND 5.0V 2.5V VDD/2 GND Output Voltage (VOUT) Output Voltage (VOUT) GND tPHL 8 GND tPHL tPLH Nch Open Drain Output CMOS Output (R3117xxxxA) (R3117xxxxC) tPLH R3117xxx1/2 OPERATION * Operation of R3117xxxxA SENSE VDD Ra Comparator DOUT DOUT pin should be pulled-up to VDD or an external voltage level. Rb Vref Nch Tr.1 Rc GND Block Diagram (R3117xxxxA) 1 3 2 Supply Voltage (VDD) Minimum Operating VDDL Voltage Released Voltage +VDET Detector Threshold -VDET A Detector Threshold Hysteresis B SENSE Pin Voltage (VSENSE) GND Step 1 2 3 Comparator (-) Pin Input Voltage I II I Comparator Output L H L Tr.1 OFF ON OFF OFF ON OFF Output Tr. I Pull-up Voltage Detect Delay Time Output Voltage (VOUT) tPHL Output Delay Time tPLH II Nch Rb+Rc xVSENSE Ra+Rb+Rc Rb Ra+Rb xVSENSE GND Operation Diagram * Explanation of operation Step 1. The output voltage is equal to the pull-up voltage. Step 2. At Point "A", Vref > = VSENSEx(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reversed from "L" to "H", therefore the output voltage becomes the GND level. The voltage level of Point A means a detector threshold voltage (-VDET). (When the supply voltage is lower than the minimum operating voltage, the operation of the output transistor becomes indefinite. The output voltage is equal to the GND level.) Step 3. At Point "B", Vref < = VSENSExRb/(Ra+Rb) is true, as a result, the output of comparator is reversed from "H" to "L", then the output voltage is equal to the pull-up voltage. The voltage level of Point B means a released voltage (+VDET). ) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis. 9 R3117xxx1/2 * Operation of R3117xxxxC SENSE VDD Ra Comparator Pch DOUT Rb Vref Nch Tr.1 Rc GND Block Diagram (R3117xxxxC) 1 2 3 Supply Voltage (VDD) Minimum Operating VDDL Voltage Released Voltage +VDET Detector Threshold -VDET A Detector Threshold Hysteresis B SENSE Pin Voltage (VSENSE) Step 1 2 3 Comparator (-) Pin Input Voltage I II I Comparator Output L H L Tr.1 OFF ON OFF Pch ON OFF ON Nch OFF ON OFF Output Tr. GND I Supply Voltage (VDD) Detect Delay Time Output Voltage (VOUT) tPHL Output Delay Time tPLH II Rb+Rc xVSENSE Ra+Rb+Rc Rb Ra+Rb xVSENSE GND Operation Diagram * Explanation of operation Step 1. The output voltage is equal to the supply voltage (VDD). Step 2. At Point "A", Vref > = VSENSEx(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reversed from "L" to "H", therefore the output voltage becomes the GND level. The voltage level of Point A means a detector threshold voltage (-VDET). (When the supply voltage is lower than the minimum operating voltage, the operation of the output transistor becomes indefinite. The output voltage is equal to the GND level. Step 3. At Point "B", Vref < = VSENSExRb/(Ra+Rb) is true, as a result, the output of comparator is reversed from "H" to "L", then the output voltage is equal to the supply voltage (VDD). The voltage level of Point B means a released voltage (+VDET). ) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis. 10 R3117xxx1/2 Power supply injection order The R3117xxxxA/C Series supervise the voltage of the SENSE pin. VDD pin and SENSE pin can be used at the same voltage level. Likewise, VDD pin and SENSE pin can be used at the different voltage level. If the VDD pin and SENSE pin are used at different voltage level, regarding the start-up sequence, force the voltage level to VDD pin prior to the SENSE pin. If the SENSE pin voltage is equal or more than the released voltage (+VDET), DOUT pin becomes "H". Besides, a voltage beyond VDD pin is also acceptable to SENSE pin. Concerning the R3117xxxxA series (Nch open drain output type), DOUT pin must be pulled-up with an external resistor. VDD +VDET VSENSE VOUT t Fig.1 Turn on sequence Outside setting of the detection voltage To monitor the voltage more than 5.0V or if the different detector threshold with using lower threshold device, divider resistors can be applied to the SENSE pin. In this usage, some error range will be generated to the detector threshold voltage caused by the internal resistor RSENSE (Fig.3) of the IC. Supposed that the detector threshold voltage is described as Vs, the next equation will be true. VS = -VDET x (Ra+Rb)/Rb. However, actually an error includes by SENSE resistance (RSENSE) of the IC inside. (Figure 3) Ia = Ib + ISENSE ....................................... (1) Ib = -VDET / Rb ....................................... (2) Thus, Ia = -VDET / Rb + ISENSE ....................................... (3) Therefore, VS = -VDET + Ia x Ra ....................................... (4) 11 R3117xxx1/2 Put Equation (3) into Equation (4), then VS = -VDET x (Ra + Rb) / Rb + Ra x ISENSE Ra x ISENSE is an error in VS. Ra x ISENSE = Ra x (-VDET) / RSENSE = -VDET x Ra / RSENSE The error range is -VDET x Ra/RSENSE (Fig.3) and to make it small, choosing the low detector threshold voltage type and set the resistance values Ra, Rb as RSENSE >>Ra. Refer to the electrical characteristics table to see the RSENSE value. VDD Vs VDD Ra -VDET Rb Vs SENSE R3117x Series Ra Ia -VDET DOUT Rb GND R3117x Series SENSE ISENSE Ib RSENSE GND Fig.2 Fig.3 Accuracy Detector Threshold If the VDD bias voltage is lager than 5.25V, and to keep the detector threshold accuracy level, or if the maximum operating voltage line must be used as the VDD bias voltage, the input voltage must be set low by using the divider resistors which are shown in Fig.4. VB R1 Vs Ra -VDET Rb VDD SENSE R3117x Series GND Fig.4 12 R2 DOUT R3117xxx1/2 Detector Operation vs. glitch input voltage to the SENSE pin When the R3117x is at released, if the pulse voltage which the detector threshold or lower voltage, the graph below means that the relation between pulse width and the amplitude of the swing to keep the released state for the R3117x. Pulse Width Sense Voltage (VSENSE) Detector Threshold (-VDET) Over Drive VSENSE Input Waveform This graph shows the maximum pulse conditions to keep the released voltage. If the pulse with larger amplitude or wider width than the graph above, is input to SENSE pin, the reset signal may be output. 13 R3117xxx1/2 TEST CIRCUITS ISS VIN SENSE 5V or VDD VDD VDD R3117x Series VIN SENSE R3117x Series 470k DOUT VOUT GND GND Supply Current Test Circuit Detector Threshold Test Circuit (Pull-up circuit is not necessary for CMOS Output type.) VDD VIN SENSE R3117x Series IOUT DOUT GND Nch Driver Output Current Test Circuit VDS VDD VIN VDS SENSE R3117x Series IOUT DOUT GND Pch Driver Output Current Test Circuit Apply to CMOS Output type only 14 VDD-VDS R3117xxx1/2 TYPICAL CHARACTERISTICS 1) Supply Current vs. Supply Voltage R3117xxxxA/C (at released) R3117xxxxA/C (at detect) 2) Detector Threshold vs. Temperature R3117x07xA/C R3117x30xA/C R3117x50xA/C 15 R3117xxx1/2 3) Detector Threshold vs. Supply Voltage R3117x07xA/C R3117x30xA/C R3117x50xA/C 4) Hysteresis vs. Supply Voltage R3117x07xA/C 16 R3117x30xA/C R3117xxx1/2 R3117x50xA/C 5) Output Voltage vs. SENSE pin Input Voltage (Nch Open Drain Output type is pulled up to VDD.) R3117x07xA/C R3117x30xA/C R3117x50xA/C 17 R3117xxx1/2 6) Nch Driver Output Current vs. Supply Voltage R3117xxxxA/C 8) Pch Driver Output Current vs. Supply Voltage R3117xxxxC 18 7) Nch Driver Output Current vs. VDS R3117xxxxA/C 9) Pch Driver Output Current vs. VDS R3117xxxxC R3117xxx1/2 TYPICAL APPLICATION * R3117xxxxA CPU Reset Circuit (Nch Open Drain Output) (1) Input Voltage to R3117xxxxA is equal to Input Voltage to CPU VDD 470k R VDD VDD Vs CPU R3117xxxxA Series DOUT SENSE RESET GND GND (2) Input Voltage to R3117xxxxA is unequal to Input Voltage to CPU VDD1 470k R VDD Vs R3117xxxxA Series DOUT SENSE GND * VDD2 VDD CPU RESET GND R3117xxxxC CPU Reset Circuit (CMOS Output) VDD VDD Vs R3117xxxxC Series DOUT SENSE GND VDD CPU RESET GND 19 R3117xxx1/2 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 100 k or less as a guide, and connect CIN of 0.1 F 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 a 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 *1 In the CMOS output type, a charging current for OUT pin is included. *2 Note the bias dependence of capacitors. 20 Voltage Detector GND Figure B OUT pin 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. 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