7 S72Nxx Semiconductor 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. Marking Package Code S72Nxx S72N□□ TO-92 □□: Detecting Voltage Code Outline Dimensions Unit : mm 3.45±0.1 2.25±0.1 4.5±0.1 4.5±0.1 2.06±0.1 14.0±0.40 0.4±0.02 2.54 Typ. 1.27 Typ. 0.38 1.20±0.1 1 2 3 KSI-9046-000 PIN Connections 1. OUT 2. Vcc 3. GND 1 S72Nxx Equivalent Circuit Diagram Vcc OUT GND Maximum ratings Characteristic (Ta=25°C) Unit Symbol Ratings Supply voltage Vcc -0.3 ~ +10 V Power Dissipation (Package Limitation) PD 500 mW Operating Temperature Topr -20 ~ +75 ℃ Storage Temperature Tstg -40 ~ +125 ℃ Electrical Characteristics (Vcc=5V, Ta=25°C) Symbol Test Circuit Detecting Voltage VS 1 Hysteresis Voltage ΔVS 1 RL=470Ω,VCC=L→H→L VS/ΔT 1 Low Level Output voltage VOL Circuit current at ON Typ. Max. Unit 40 100 300 mV RL=470Ω, Ta= -20~75℃ - ±0.01 - %/℃ 1 RL=470Ω, VCC= VS Min - 0.1 0.4 V ICCL 1 RL=∞Ω, VCC= VS Min - 100 180 µA Circuit current at OFF ICCH 1 RL=∞Ω,VCC=VS Max +0.1V - 1.0 2.5 µA Threshold Operating Voltage Vopr 1 RL=4.7 ㏀, VOL≤0.4V - 1.4 1.6 V Output Current at ON I IOL 1 1 RL=0Ω, VCC= VS Min 10 20 - mA Output Current at ON II IOL 2 1 RL=0Ω, VCC= VS Min , Ta= -20~75℃ 5 - - mA L→H Transmission delay time tPLH 2 RL=4.7 ㏀, CL=100 ㎊ - 100 500 ㎲ H→L Transmission delay time tPHL 2 RL=4.7 ㏀, CL=100 ㎊ - 10 20 ㎲ Characteristic Temperature Coefficient Of detecting voltage Test Condition Min. * See Table 1 KSI-9046-000 2 S72Nxx * Table 1 Electrical Characteristics Characteristic Detecting voltage (Vcc=5V, Ta=25°C) Symbol VS Test Circuit 1 Test Condition RL=470Ω VCC=H→L VOL≤0.4V KSI-9046-000 Min. Typ. Max. S72N45 4.30 4.5 4.70 S72N42 4.00 4.2 4.40 S72N39 3.70 3.9 4.10 S72N36 3.40 3.6 3.80 S72N33 3.10 3.3 3.50 S72N31 2.90 3.1 3.30 S72N29 2.75 2.9 3.05 S72N27 2.55 2.7 2.85 S72N25 2.35 2.5 2.65 S72N23 2.15 2.3 2.45 Unit V 3 S72Nxx 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-9046-000 4 S72Nxx Electrical Characteristic Curves Fig. 2 ICC – VCC Fig. 1 VO – VCC Fig. 3 △VS – Ta Fig. 4 VS – Ta Fig. 5 ICCL – Ta Fig. 6 VOL – Ta KSI-9046-000 5 S72Nxx Fig. 8 ICCH – Ta Fig. 7 IOL – Ta Fig. 9 CL – tPLH KSI-9046-000 6 S72Nxx 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-9046-000 7