LOW VOLTAGE DETECTOR R3111x SERIES NO. EA-056-070403 OUTLINE The R3111 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. Three output types, Nch open drain type and CMOS type are available. The R3111 Series are operable at a lower voltage than that for the RX5VL series, and can be driven by a single battery. Six types of packages, TO-92, SOT-89, SOT-23-3, SOT-23-5, SC-82AB, and SON1612-6 are available. FEATURES * Ultra-low Supply Current ...................................................... Typ. 0.8A (VDD=1.5V) * Wide Range of Operating Voltage........................................ 0.7V to 10.0V (Topt=25C) * Detector Threshold ............................................................... Stepwise setting with a step of 0.1V in the range of 0.9V to 6.0V is possible. * High Accuracy Detector Threshold....................................... 2.0% * Low Temperature-Drift Coefficient of Detector Threshold .... Typ. 100ppm/C * Two Output Types ................................................................ Nch Open Drain and CMOS * Six Types of Packages ......................................................... TO-92, SOT-89(Mini-power Mold), SOT-23-3, SOT-23-5 (Mini-mold), SC-82AB, SON1612-6 APPLICATIONS * * * * * * CPU and Logic Circuit Reset Battery Checker Window Comparator Wave Shaping Circuit Battery Back-up Circuit Power Failure Detector 1 R3111x BLOCK DIAGRAMS R3111xxxxA R3111xxxxC VDD VDD OUT OUT Vref Vref GND GND R3111xxxxB VDD OUT + Vref GND TIMING CHART R3111XXX1A/C Release Voltage +VDET Supply Voltage Detector Threshold -VDET (VDD) Minimum Operating Voltage VSS Detector Threshold Hysteresis Output Voltage (OUT) VSS tPLH 2 R3111x R3111XXX1B ? A @ B Hysteresis(VHYS) A Power Supply (VDD) Released Voltage (+VDET) Detector Threshold (-VDET) Minimum Operating Voltage (VDDL) GND Pull-up Voltage Output Voltage (VOUT) t PLH GND DEFINITION OF OUTPUT DELAY TIME Output Delay Time tPLH/tPHL is defined as follows: 1. In the case of Nch Open Drain Output:(R3111XXXXA/B) Under the condition of the output pin (OUT) is pulled up through a resistor of 470k to 5V, the time interval between the rising edge of VDD pulse from 0.7V to (+VDET)+ 2.0V and becoming of the output voltage to 2.5V. 2. In the case of CMOS Output:(R3111XXXXC) The time interval between the rising edge of VDD pulse from 0.7V to (+VDET)+ 2.0V and becoming of the output voltage to (VDD/2) V. +VDET + 2.0V +VDET + 2.0V Input Voltage (VDD) Input Voltage (VDD) 0.7V 0.7V GND GND 5.0V +VDET+2.0V Output Voltage Output Voltage +VDET+2.0V 2 2.5V GND GND tPHL tPLH Nch Open Drain Output(R3111XXXXA) tPHL tPLH CMOS Output(R3111XXXXC) 3 R3111x +VDET +2.0V Input Voltage (VDD) 0.7V GND 5.0V Output Voltage 2.5V GN tp LH tp HL Nch Open Drain Output (R3111XXXXB) SELECTION GUIDE The package type, the detector threshold, the output type and the taping type of R3111 Series can be designated at the users' request by specifying the part number as follows; R3111xxxxx-xx Part Number a b cd e Code a b c d e 4 Descriptions Designation of Package Type; E: TO-92 Q: SC-82AB H: SOT-89 N: SOT-23-5 / SOT-23-3 D: SON1612-6 Setting Detector Threshold (-VDET); Stepwise setting with a step of 0.1V in the range of 0.9V to 6.0V is possible. Designation of Package Type 1: except SOT-23-3 2: SOT-23-3 Designation of Output Type; A: Nch Open Drain(Output "L" at VDD=-Vdet) B: Nch Open Drain(Output "H" at VDD=-Vdet) C: CMOS (Output "L" at VDD=-Vdet) Designation of Packing or Taping Type; Ex.TO-92: TZ, SOT-89: T1, SOT-23-3, SOT-23-5, SC-82AB, SON1612-6: TR prescribed as standard directions. (Refer to Taping Specifications.) Antistatic bag for samples: C R3111x PIN CONFIGURATION TO-92 SOT-89 SOT-23-3 SOT-23-5 5 3 SC-82AB 4 4 SON1612-6 654 3 (mark side) (mark side) (mark side) (mark side) 123 1 (mark side) 1 1 2 2 1 3 1 2 2 2 3 3 PIN DESCRIPTION TO-92 SOT-89 SOT-23-3 SOT-23-5 SC-82AB Pin No. Symbol Pin No. Symbol Pin No. Symbol Pin No. Symbol Pin No. Symbol 1 VDD 1 OUT 1 OUT 1 OUT 1 OUT 2 GND 2 VDD 2 GND 2 VDD 2 VDD 3 OUT 3 GND 3 VDD 3 GND 3 NC 4 NC 4 GND 5 NC SON1612-6 Pin No. Symbol 1 OUT 2 VDD 3 GND 4 NC 5 VDD 6 NC 5 R3111x ABSOLUTE MAXIMUM RATINGS Symbol VDD Item Rating Unit 12 V VSS-0.3 to VDD+0.3 V VSS-0.3 to 12 V 70 mA 300 mW Supply Voltage VOUT1 Output Voltage (CMOS) VOUT2 Output Voltage (Nch) IOUT Output Current Note1 PD Power Dissipation 1 Note2 PD Power Dissipation 2 150 mW PD Power Dissipation 3Note3 500 mW Topt Operating Temperature Range -40 to 85 C Tstg Storage Temperature Range -55 to 125 C Tsolder Lead temperature (Soldering) 260C, 10s Note 1: applied to SOT-89 and TO-92 Single suspended in the air Note 2: applied to SOT-23-3, SOT-23-5 and SC-82AB Single suspended in the air Note 3: applied to SON1612-6 at mounted on board PD depends on conditions of mounting on board. This specification is based on the measurement at the condition below: Measurement Conditions Environment: Mounted on board (Wind velocity 0m/s) Board Material: FR-4 (2-layer) Board dimensions : 40mm x 40mm x t1.6mm Copper Area: 50% ELECTRICAL CHARACTERISTICS Topt=25C R3111x09xA/C Symbol Conditions Min. Typ. Max. Unit -VDET Detector Threshold 0.882 0.900 0.918 V VHYS Detector Threshold Hysteresis 0.027 0.045 0.063 V 0.8 0.9 2.4 2.7 A 10 V ISS Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT tPLH -VDET/T 6 Item Output Current (Driver Output Pin) VDD= 0.80V 2.90V Topt=25C -40C < = Topt < = 85C Nch VDS=0.05V, VDD=0.70V VDS=0.50V, VDD=0.85V Pch VDS=-2.1V,VDD=4.5V 0.55 0.70 0.65 0.80 0.01 0.05 0.05 0.50 1.0 2.0 Output Delay TimeNote2 Detector Threshold Temperature Coefficient mA mA 100 -40C < = Topt < = 85C 100 V s ppm/C R3111x Topt=25C R3111x18xA/C Symbol Item Conditions Min. Typ. Max. U= =nit -VDET Detector Threshold 1.764 1.800 1.836 V VHYS Detector Threshold Hysteresis 0.054 0.090 0.126 V 0.8 1.0 2.4 3.0 A 10 V ISS Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT Output Current (Driver Output Pin) tPLH -VDET/T VDD= 1.70V 3.80V Topt=25C 0.55 0.70 -40C < = Topt < = 85C Nch VDS=0.05V, VDD=0.70V VDS=0.50V, VDD=0.85V Pch VDS=-2.1V, VDD=4.5V 0.65 0.80 0.01 1.00 0.05 2.00 1.0 2.0 Output Delay TimeNote2 Detector Threshold Temperature Coefficient mA mA 100 -40C < = Topt < = 100 85C s ppm/C Topt=25C R3111x27xA/C Symbol V Item Conditions Min. Typ. Max. Unit -VDET Detector Threshold 2.646 2.700 2.754 V VHYS Detector Threshold Hysteresis 0.081 0.135 0.189 V 0.9 1.1 2.7 3.3 A 10 V ISS Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT tPLH -VDET/T Output Current (Driver Output Pin) VDD= 2.60V 4.70V Topt=25C -40C < = Topt < = 85C Nch VDS=0.05V, VDD=0.70V VDS=0.50V,VDD=1.50V Pch VDS=-2.1V, VDD=4.5V 0.55 0.70 0.65 0.80 0.01 1.00 0.05 2.00 1.0 2.0 Output Delay TimeNote2 Detector Threshold Temperature Coefficient mA mA 100 -40C < = Topt < = 85C 100 V s ppm/C 7 R3111x Topt=25C R3111x36xA/C Symbol Item Conditions Min. Typ. Max. Unit -VDET Detector Threshold 3.528 3.600 3.672 V VHYS Detector Threshold Hysteresis 0.108 0.180 0.252 V 1.0 1.2 3.0 3.6 A 10 V ISS Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT Output Current (Driver Output Pin) VDD= 3.47V 5.60V Topt=25C -40C < = Topt < = 85C Nch VDS=0.05V, VDD=0.70V VDS=0.50V, VDD=1.50V Pch VDS=-2.1V, VDD=4.5V tPLH -VDET/T Output Delay TimeNote2 Detector Threshold Temperature Coefficient 0.55 0.70 0.65 0.80 0.01 1.00 0.05 2.00 1.0 2.0 mA mA 100 -40C < = Topt < = 100 85C Topt=25C Item Conditions Min. Typ. Max. Unit -VDET Detector Threshold 4.410 4.500 4.590 V VHYS Detector Threshold Hysteresis 0.135 0.225 0.315 V 1.1 1.3 3.3 3.9 A 10 V ISS Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT tPLH -VDET/T 8 s ppm/C R3111x45xA/C Symbol V Output Current (Driver Output Pin) Output Delay TimeNote2 Detector Threshold Temperature Coefficient VDD= 4.34V 6.50V Topt=25C -40C < = Topt < = 85C Nch VDS=0.05V, VDD=0.70V VDS=0.50V, VDD=1.50V Pch VDS=-2.1V, VDD=8.0V 0.55 0.70 0.65 0.80 0.01 1.00 0.05 2.00 1.5 3.0 mA mA 100 -40C < = Topt < = 85C 100 V s ppm/C R3111x Topt=25C R3111x54xA/C Symbol Item Conditions Min. Typ. Max. Unit -VDET Detector Threshold 5.292 5.400 5.508 V VHYS Detector Threshold Hysteresis 0.162 0.270 0.378 V 1.2 1.4 3.6 4.2 A 10 V ISS Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT Output Current (Driver Output Pin) tPLH -VDET/T VDD= 5.20V 7.40V Topt=25C 0.55 0.70 -40C < = Topt < = 85C Nch VDS=0.05V, VDD=0.70V VDS=0.50V, VDD=1.50V Pch VDS=-2.1V, VDD=8.0V 0.65 0.80 0.01 1.00 0.05 2.00 1.5 3.0 Output Delay TimeNote2 Detector Threshold Temperature Coefficient mA mA 100 < = -40C Topt < = 100 85C V s ppm/C Note1: Minimum operating voltage means the value of input voltage when output voltage maintains 0.1V or less. (In the case of Nch Open Drain Output type, the output pin is pulled up with a resistance of 470k to 5.0V.) Note2: In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output voltage level becoming to VDD/2. In the case of Nch Open Drain Output type: the output pin is pulled up with a resistance of 470k to 5.0V, The time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output voltage level becoming to 2.5V. Topt=25C R3111Q231B Symbol Item Conditions Min. Typ. Max. Unit -VDET Detector Threshold 2.254 2.300 2.346 V VHYS Detector Threshold Hysteresis 0.069 0.115 0.161 V 0.9 1.1 2.7 3.3 A 10 V ISS Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT PLH -VDET/T Output Current (Driver Output Pin) VDD=2.20V 4.30V Topt=25C -40C < = Topt < = 85C Nch VDS=0.50V,VDD=3.00V 0.55 0.70 0.65 0.80 10 Output Delay TimeNote2 Detector Threshold Temperature Coefficient mA 100 -40C < = Topt < = 85C 100 V s ppm/C 9 R3111x Topt=25C R3111Q441B Symbol Item Conditions Min. Typ. Max. Unit -VDET Detector Threshold 4.312 4.400 4.488 V VHYS Detector Threshold Hysteresis 0.132 0.220 0.308 V 1.1 1.3 3.3 3.9 A 10 V ISS VDD= 4.24V 6.40V Supply Current VDDH Maximum Operating Voltage VDDL Minimum Operating VoltageNote1 IOUT Output Current (Driver Output Pin) tPLH Output Delay TimeNote2 -VDET/T Topt=25C 0.55 0.70 -40C < = Topt < = 85C Nch VDS=0.50V, VDD=5.50V 0.65 0.80 18 mA 100 Detector Threshold Temperature Coefficient -40C < = Topt < = 100 85C V s ppm/C Note1: Minimum operating voltage means the value of input voltage when output voltage maintains 0.1V or less. (In the case of Nch Open Drain Output type, the output pin is pulled up with a resistance of 470k to 5.0V.) Note2: In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output voltage level becoming to VDD/2. In the case of Nch Open Drain Output type: the output pin is pulled up with a resistance of 470k to 5.0V, The time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output voltage level becoming to 2.5V. OPERATION VDD Ra Pch OUT Rb Comparator Nch Vref Rc GND Figure 1. Block Diagram (R3111XXXXC) 10 R3111x 1 Supply Voltage (VDD) 2 3 4 5 B Released Voltage(+VDET) Detector Threshold(-VDET) A Detector Threshold Hysteresis Step 1 2 3 4 5 Comparator Pin Input Voltage I II III IV V Comparator Output H L Inde-finite L H OFF ON Inde-finite ON OFF Pch ON OFF Inde-finite OFF ON Nch OFF ON OFF Minimum Operating Voltage Tr.1 GND Output Tr. Output Voltage (VOUT) I. Rb + Rc Ra + Rb + Rc x VDD II. Rb Ra + Rb x VDD GND tPLH Inde-finite ON Figure 2. Operation Diagram Step 1. The output voltage is equal to the supply voltage (VDD). Step 2. At Point "A", Vref > = VDDx(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reverse, and output voltage becomes to GND level. The voltage level of Point A means detector threshold voltage, or (-VDET). Step 3. When the supply voltage is less than minimum operating voltage, the operation of output transistor becomes indefinite, and in the case that output is pulled up to VDD, the output voltage equals to VDD voltage. Step 4. The output voltage equals to GND level. Step 5. At Point "B", Vref > = VDDxRb/(Ra+Rb) is true, Output of the comparator is reverse, and output voltage is equal to the supply voltage, or (VDD). The voltage level of Point B means released voltage, or (+VDET). The difference between released voltage and detector threshold voltage is the detector threshold hysteresis. VDD Ra OUT + OUT pin should be pulled up to VDD or another voltage source. Comparator Rb Vref Nch Rc GND Figure 3. Block Diagram (R3111XXXXB) 11 R3111x ? B Hysteresis Range (VHYS) Supply A Voltage Step 1 2 3 Comparator Pin Input Voltage I II III Comparator Output H L H OFF ON OFF ON OFF ON A @ Released Voltage (+VDET) Detector Threshold (-VDET) Minimum Operating Voltage (VDDL) (VDD) Tr.1 GND Output Tr. Pull-up Voltage Output Voltage (VOUT) I. Rb + Rc Ra + Rb + Rc x VDD II. Rb Ra + Rb x VDD t PLH GND Nch Figure 4. Operation Diagram Step 1. The output voltage is equal to the supply voltage (VDD). Step 2. At Point "A", Vref > = VDDx(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reverse, and output voltage becomes to Pull-up level. The voltage level of Point A means detector threshold voltage, or (-VDET). Step 3. At Point "B", Vref > = VDDxRb/(Ra+Rb) is true, Output of the comparator is reverse, and output voltage is equal to the GND after tpHL. The voltage level of Point B means released voltage, or (+VDET). The difference between released voltage and detector threshold voltage is the detector threshold hysteresis. TEST CIRCUITS ISS 5.0V VDD VDD VIN R3111X Series 470k R3111X Series VIN VOUT OUT OUT GND GND Pull-up circuit is not necessary for CMOS Output type, or R3111xxxxC. Supply Current Test Circuit Detector Threshold Test Circuit VIN R3111X Series IOUT IOUT VIN R3111X Series OUT OUT VDS GND VDS VDD VDD VDD- VDS GND Apply to CMOS Output type only 12 R3111x Nch Driver Output Current Test Circuit Pch Driver Output Current Test Circuit +5.0V +VDET+2.0V VDD 0.7V VSS R3111XXXXA Series OUT P.G. +VDET+2.0V ROUT 470k 0.7V VSS OUT P.G. VDD CIN GND +5.0V RIN 100k COUT ROUT 470k R3111XXXXA Series OUT OUT GND VSS VSS Output Delay Time Test Circuit (1) Output Delay Time Test Circuit (2) TYPICAL CHARACTERISTICS 1) Supply Current vs. Input Voltage R3111x09xC R3111x27xC 2.0 Topt=85C Supply Current ISS(A) Supply Current ISS(A) 2.5 2.0 1.5 25C 1.0 -40C 0.5 Topt=85C 1.5 25C 1.0 -40C 0.5 0.0 0.0 0 2 4 6 Input Voltage VIN(V) 8 10 0 2 4 6 Input Voltage VIN(V) 8 10 13 R3111x R3111x45xC Supply Current ISS(A) 2.0 Topt=85C 1.5 25C 1.0 -40C 0.5 0.0 0 2 4 6 Input Voltage VIN(V) 8 10 2) Detector Threshold Hysteresis vs. Temperature R3111x09xC R3111x27xC 2.9 Detector Threshold -VDET(V) Detector Threshold -VDET(V) 1.00 0.98 0.96 0.94 +VDET 0.92 0.90 -VDET 0.88 0.86 0.84 -60 -40 -20 0 20 40 60 Temperature Topt(C) 80 100 80 100 R3111x45xC Detector Threshold -VDET(V) 4.8 4.7 4.6 4.5 4.4 -60 14 +VDET -VDET -40 -20 0 20 40 60 Temperature Topt(C) 2.8 +VDET 2.7 -VDET 2.6 2.5 -60 -40 -20 0 20 40 60 Temperature Topt(C) 80 100 R3111x 3) Output Voltage vs. Input Voltage R3111x09xC R3111x09xA 5V Pull-up 470k 6 1.4 Output Voltage VOUT(V) Output Voltage VOUT(V) 1.6 1.2 1.0 0.8 85C 0.6 25C Topt=-40C 0.4 0.2 0.0 Topt=-40C 5 4 25C 3 2 85C 1 0 0 0.2 0.4 0.6 0.8 1 1.2 Input Voltage VIN(V) 1.4 1.6 0 0.2 R3111x27xC Output Voltage VOUT(V) Output Voltage VOUT(V) 3.5 3.0 2.5 2.0 85C 1.0 25C 0.5 1.6 5V Pull-up 470k 6 1.5 1.4 R3111x27xA 4.0 5 Topt=-40C 4 25C 3 85C 2 1 Topt=-40C 0.0 0 0 0.5 1 1.5 2 2.5 3 Input Voltage VIN(V) 3.5 4 0 0.5 R3111x45xC 1.5 2 2.5 3 Input Voltage VIN(V) 3.5 4 5V Pull-up 470k 6 Output Voltage VOUT(V) 5 4 3 2 85C 25C 1 Topt=-40C 0 0 1 2 3 4 Input Voltage VIN(V) 1 R3111x45xA 6 Output Voltage VOUT(V) 0.4 0.6 0.8 1 1.2 Input Voltage VIN(V) Topt=-40C 5 25C 4 85C 3 2 1 0 5 6 0 1 2 3 4 Input Voltage VIN(V) 5 6 15 R3111x 4) Nch Driver Output Current vs. VDS R3111x09xC R3111x09xC Topt=25C 600 VDD=0.85V 500 400 300 200 0.7V 100 Topt=25C 300 Output Current IOUT(A) Output Current IOUT(A) 700 0 250 VDD=0.8V 200 150 100 0.7V 50 0 0 0.2 0.4 VDS(V) 0.6 0.8 0 0.02 Topt=25C 20 18 16 14 VDD=2.5V 12 10 8 6 4 0.1 2.0V 1.5V Topt=25C 300 2 0 250 VDD=0.8V 200 150 0.7V 100 50 0 0 0.5 1 1.5 VDS(V) 2 2.5 0 0.02 R3111x45xC Topt=25C 4.0V 40 3.5V 30 3.0V 2.5V 2.0V 10 0.08 0.1 Topt=25C 300 Output Current IOUT(A) VDD=4.5V 50 20 0.04 0.06 VDS(V) R3111x45xC 60 Output Current IOUT(mA) 0.08 R3111x27xC Output Current IOUT(A) Output Current IOUT(mA) R3111x27xC 0.04 0.06 VDS(V) 250 VDD=0.8V 200 150 0.7V 100 50 1.5V 0 0 0 16 0.5 1 1.5 2 2.5 VDS(V) 3 3.5 4 4.5 0 0.02 0.04 0.06 VDS(V) 0.08 0.1 R3111x R3111x27xC 900 14 800 12 Output Current IOUT(mA) Output Current IOUT(mA) 5) Nch Driver Output Current vs. Input Voltage R3111x09xC 700 600 500 Topt=-85C 400 300 25C 200 100 0 -40C 0 0.2 0.4 0.6 Input Voltage VIN(V) 10 Topt=-40C 25C 8 6 85C 4 2 0 0.8 1 0 0.5 1 1.5 1 Input Voltage VIN(V) 2.5 3 R3111x45xC Output Current IOUT(mA) 25 20 Topt=-40C 15 25C 10 85C 5 0 0 2 3 4 Input Voltage VIN(V) 5 6 Pch Driver Output Current vs. Input Voltage R3111x09xC Topt=25C 1.4 Output Current IOUT(mA) R3111x27xC 1.2 VDS=0.7V 1.0 0.8 0.6 0.5V 0.4 0.2 Topt=25C 3.5 Output Current IOUT(mA) 6) 1 3.0 VDS=2.1V 2.5 2.0 1.5V 1.5 1.0V 1.0 0.5V 0.5 0.0 0.0 0 2 4 6 Input Voltage VIN(V) 8 0 1 2 3 4 5 Input Voltage VIN(V) 6 7 17 R3111x R3111x45xC Topt=25C Output Current IOUT(mA) 4.5 4.0 3.5 VDS=2.1V 3.0 1.5V 2.5 2.0 1.0V 1.5 1.0 0.5V 0.5 0.0 0 2 4 6 8 Input Voltage VIN(V) 10 7) Output Delay Time vs. Load Capacitance R3111x09xA R3111x27xA 100 Output Delay Time tP(ms) Output Delay Time tP(ms) 100 10 1 tPLH 0.1 0.01 0.001 0.0001 tPHL 0.001 0.01 Load Capacitance COUT(F) 0.1 R3111x45xA Output Delay Time tP(ms) 100 10 1 0.1 0.01 0.001 0.0001 18 tPLH tPHL 0.001 0.01 Load Capacitance COUT(F) 0.1 10 1 tPLH 0.1 0.01 0.001 0.0001 tPHL 0.001 0.01 Load Capacitance COUT(F) 0.1 R3111x 8) Output Delay Time vs. Input Pin Capacitance R3111x09xA R3111x27xA 100 Output Delay Time tP(ms) Output Delay Time tP(ms) 100 10 tPHL 1 0.1 tPLH 0.01 0.001 0.0001 0.001 0.01 Input Pin Capacitance CIN(F) 0.1 10 1 tPLH 0.1 tPHL 0.01 0.001 0.0001 0.001 0.01 Input Load Capacitance CIN(F) 0.1 R3111x45xA Output Delay Time tP(ms) 100 10 1 tPLH 0.1 tPHL 0.01 0.001 0.001 0.01 0.1 Input Pin Capacitance CIN(F) 1 TYPICAL APPLICATIONS R3111xxxxA CPU Reset Circuit (Nch Open Drain Output) Case 1. Input Voltage to R3111xxxxA is equal to Input Voltage to CPU VDD VDD 470k R3111XXXXA SERIES GND R VDD CPU OUT RESET GND Case 2. Input Voltage to R3111xxxxA is unequal to Input Voltage to CPU VDD1 VDD2 VDD 470k R3111XXXXA SERIES OUT R VDD CPU RESET GND GND 19 R3111x R3111xxxxA CPU Reset Circuit CMOS Output VDD VDD VDD R3111XXXXC SERIES CPU RESET GND OUT GND R3111xxxxA Output Delay Time Circuit 1 (Nch Open Drain Output) R3111xxxxA Output Delay Time Circuit 2 (Nch Open Drain Output) VDD VDD 470k R3111XXXXA SERIES VDD R VDD 100k CPU RESET GND OUT 470k R1 VDD R3111XXXXA SERIES VDD R2 CPU RESET GND OUT GND GND Memory Back-up Circuit VDD D1 VCC D2 A B G VDD Y1 Y2 Y3 Y4 VCC VCC VCC VCC RAM1 RAM2 RAM3 RAM4 GND CS GND CS GND CS GND CS GND R3111XXXXC OUT SERIES GND Voltage level Indicator Circuit (lighted when the power runs out) (Nch Open Drain Output) VDD VDD OUT R3111XXXXA SERIES GND 20 R3111x Detector Threshold Adjustable Circuit (Nch Open Drain Output) Adjusted Detector Threshold =(-VDET)(Ra+Rb)/Rb VDD Ra OUT R3111XXXXA SERIES GND Hysteresis Voltage =(VHYS)(Ra+Rb)/Rb VDD C + Rb ) If the value of Ra is set excessively large, voltage drop may occur caused by the supply current of IC itself, and detector threshold may vary. Window Comparator Circuit (Nch Open Drain Output) VDD VDD VDD VDD R3111XXXXA OUT SERIES VDET1 R3111XXXXA OUT SERIES VDET2 VDET1 VDET2 OUT VSS GND OUT GND VSS Over-charge Preventing Circuit D1 Solar Battery R2 VDD R3 OUT R3111XXXXC SERIES R4 Load R1 Light GND 21 R3111x TECHNICAL NOTES VDD VDD R1 R VDD VDD R3111 SERIES R2 OUT GND Figure 9 R3111 SERIES OUT GND Figure 10 1. In Figure 9, When R3111xxxxC is used, and if an impedance is connected between Voltage Supplier and the VDD Pin of R3111xxxxC Series, the operation might be unstable by cross conduction current at detection. When R3111xxxxA/B is used in Figure 9, if the value of R is set excessively large, voltage drop may occur caused by supply current of IC itself and Detector threshold may vary. 2. Wiring as shown in Figure 10 may cause the oscillation in both output types of R3111 Series. 22