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| 7 Semiconductor S72NXXN 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. S72NXXN Marking S72N : Detecting Voltage Code Package Code TO-92N Unit : mm Outline Dimensions 4.20~4.40 4.20~4.40 2.25 M ax. 0.72 M ax. 0.52 M ax. 13.50~14.50 0.90 M ax. 1.27 Typ. 2.14 Typ. 1 3.09~3.29 2 3 0.40 M ax. 3.55 Typ PIN Connections 1. OUT 2. Vcc 3. GND KSD-I0C002-000 1 S72NXXN Equivalent Circuit Diagram Vcc OUT GND Maximum ratings Characteristic Supply Voltage Power Dissipation Output Voltage Operating Temperature Range Storage Temperature Range Symbol VCC PD VOUT TOPR TSTG Ratings -0.3 ~ +10 500 -0.3 ~ +10 -20 ~ +75 -40 ~ +125 (Ta=25C) Unit V mW V Electrical Characteristics Characteristic Detecting Voltage Hysteresis Voltage Temperature Coefficient of Detecting Voltage Low Level Output voltage Leakage Current When OFF Circuit current at ON Circuit current at OFF Operating Voltage Output Current at ON I Output Current at ON II LH Transmission delay time HL Transmission delay time VS : Standard Detection Voltage (VCC=5V, Ta=25C) Symbol VS VS VS/T VOL ILEAK ICCL ICCH VOPR IOL I IOL II tPLH tPHL Test Circuit 1 1 1 1 1 1 1 1 1 1 2 2 Test Condition Min. * See Table 1 Typ. Max. Unit RL=470, VCC = LHL RL =470, Ta= -20~75 RL =470, VCC = VS Min VCC=10V, RL=470 VCC = VS Min 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 40 10 5 - 100 0.01 0.1 100 1.0 1.4 20 100 10 300 0.4 0.1 180 2.5 1.6 500 20 mV %/ V A A A V mA mA KSD-I0C002-000 2 S72NXXN * Table 1 Electrical Characteristics Characteristic Symbol Test Circuit Test Condition S72N45N S72N42N S72N39N S72N36N (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. 4.50 4.20 3.90 3.60 3.30 3.10 2.90 2.70 2.50 2.30 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 S72N33N S72N31N S72N29N S72N27N S72N25N S72N23N V KSD-I0C002-000 3 S72NXXN Test Circuit 1 Test Circuit 2 Application Circuit (1) Battery Low Indicator (2) Resetting for CPU Note 1. : Connecting of LED and R2 obtains a voltage drop indicator. Note 2. : Connecting of C1 and selection of time constant with C1 and R1 set the power on delay time. KSD-I0C002-000 4 S72NXXN 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 KSD-I0C002-000 5 S72NXXN Fig. 7 IOL - Ta Fig. 8 ICCH - Ta Fig. 9 CL - tPLH KSD-I0C002-000 6 S72NXXN The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication equipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. 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, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice. KSD-I0C002-000 7 |
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