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| 7 Semiconductor S72NxxUF Standard Voltage Detector Description The function of this low reset Type IC is to accurately reset systems after detecting the supply voltage at the time of switching power on and instantaneous power off in various CPU and other logic system. Further, this IC, with its super low consumption current is most suited as a voltage check circuit for a number of products which use batteries. Features * Super low current consumption (ICCL = 1.0uA Typ.) * High current of output transistor (IOL=20mA Typ.) * Hysteresis circuit built in (VS=100mV Typ.) * It has on delay function to supplement the constant of outer C and R. Applications * Reset circuits for microcomputers, CPU and MPU. * Reset circuit for logic circuitry. * Battery voltage check circuit. * Circuit for changing over to backup battery. * Level detecting circuit. Ordering Information Type NO. S72NxxUF Marking N : Detecting Voltage Code Package Code SOT-323F Outline Dimensions 2.10.1 0.30~0.40 0.70-0.15 +0.1 1.300.1 1 1.30 BSC 2.00.1 3 2 0.110.05 PIN Connections 1. OUT 2. GND 3. Vcc KSI-2056-000 0~0.1 1 S72NxxUF Equivalent Circuit Diagram Vcc OUT GND Maximum ratings Characteristic Supply voltage Power Dissipation (Package Limitation) Operating Temperature Storage Temperature Symbol Vcc PD * Topr Tstg Ratings -0.3 ~ +10 200 -20 ~ +75 -40 ~ +125 (Ta=25C) Unit V mW * With PCB(8x8 Copper Area) at Glass Epoxy Board (t=1.7 , Area; 20x20 ) Electrical Characteristics Characteristic Detecting Voltage Hysteresis Voltage Temperature Coefficient Of detecting voltage Low Level Output voltage Circuit current at ON Circuit current at OFF Threshold Operating Voltage Output Current at ON I Output Current at ON II LH Transmission delay time HL Transmission delay time (Vcc=5V, Ta=25C) Test Circuit 1 1 1 1 1 1 1 1 1 2 2 RL=470,VCC=LHL RL=470, Ta= -20~75 RL=470, VCC= VS Min RL=, VCC= VS Min RL=,VCC=VS Max +0.1V RL=4.7 , VOL0.4V RL=0, VCC= VS Min RL=0, VCC= VS Min , Ta= -20~75 RL=4.7 , CL=100 RL=4.7 , CL=100 Symbol VS VS VS/T VOL ICCL ICCH Vopr IOL 1 IOL 2 tPLH tPHL Test Condition Min. * See Table 1 40 10 5 - Typ. Max. Unit 100 0.01 0.1 100 1.0 1.4 20 100 10 300 0.4 180 2.5 1.6 500 20 mV %/ V A A V mA mA KSI-2056-000 2 S72NxxUF * Table 1 Electrical Characteristics Characteristic Symbol Test Circuit Test Condition S72N45UF S72N42UF S72N39UF S72N36UF (Vcc=5V, Ta=25C) Min. 4.30 4.00 3.70 3.40 3.10 2.90 2.75 2.55 2.35 2.15 Typ. 4.5 4.2 3.9 3.6 3.3 3.1 2.9 2.7 2.5 2.3 Max. 4.70 4.40 4.10 3.80 3.50 3.30 3.05 2.85 2.65 2.45 Unit Detecting voltage VS 1 RL=470 VCC=HL VOL0.4V S72N33UF S72N31UF S72N29UF S72N27UF S72N25UF S72N23UF V KSI-2056-000 3 S72NxxUF Test Circuit 1 Test Circuit 2 Application Circuit (1) Battery Low Indicator (2) CPU Resetting (Note) (1) Connecting of LED and R2 obtains a voltage drop indicator. (2) Connecting of C1 and selection of time constant with C1 and R1 set the power on delay time. KSI-2056-000 4 S72NxxUF Electrical Characteristic Curves Fig. 1 VO - VCC Fig. 2 ICC - VCC Fig. 3 VS - Ta Fig. 4 VS - Ta Fig. 5 ICCL - Ta Fig. 6 VOL - Ta KSI-2056-000 5 S72NxxUF Fig. 7 IOL - Ta Fig. 8 ICCH - Ta Fig. 9 CL - tPLH KSI-2056-000 6 S72NxxUF These AUK products are intended for usage in general electronic equipments(Office and communication equipment, measuring equipment, domestic electrification, etc.). Please make sure that you consult with us before you use these AUK products in equipments which require high quality and/or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, traffic signal, combustion central, all types of safety device, etc.). AUK cannot accept liability to any damage which may occur in case these AUK products were used in the mentioned equipments without prior consultation with AUK. KSI-2056-000 7 |
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