System Reset PST70XX MITSUMI System Reset Monolithic IC PST70XX Series Outline These low reset type ICs function in a variety of CPU systems and other logic systems, to detect power supply voltage and reset the system accurately when power is turned on or interrupted. They are ideal for use in battery check circuits for products using batteries, as they have ultra-low current consumption and a high precision voltage detection function. Features 1. 2. 3. 4. 5. 6. High precision voltage detection Vs±2% max. Ultra-low current consumption ICCH=2µA typ. ICCL=3µA typ. Low operating limit voltage 0.65V typ. Hysteresis voltage provided in detection voltage 50mV typ. Output current high for ON 30mA typ. Detection voltage can be selected as desired within a range of 1.9V~4.6V in 0.1V steps, as indicated below. PST70XX Detection voltage value (Example: for 4.6V ....... PST7046) Package MMP-3A (PST70 TO-92A (PST70 M) ) Applications 1. 2. 3. 4. 5. Reset circuits in microcomputers, CPUs and MPUs. Logic circuit reset circuits. Battery voltage check circuits. Back-up power supply switching circuits. Level detection circuits. Pin Assignment 1 2 3 TO-92A 1 VCC 2 GND 3 VOUT 1 3 2 MMP-3A (TOP VIEW) 1 VCC 2 GND 3 VOUT System Reset PST70XX MITSUMI Equivalent Circuit Diagram Absolute Maximum Ratings (Ta=25°C) Item Symbol Rating Units Storage temperature TSTG -40~+125 °C Operating temperature TOPR -20~+75 °C Power supply voltage VCC max. -0.3~+10 V Allowable loss Pd Electrical Characteristics Item 200 (MMP-3A) mW 300 (TO-92A) (Ta=25°C) (Except where noted otherwise, resistance unit is Ω) Symbol Measurement conditions Measurement circuit Min. Typ. Max. Units 4.6~ Detection voltage VS RL=470 VCC=H L 1 VS typ. 1.9 VS typ. -2% (0.1V +2% V Step) Hysteresis voltage Detection voltage temperature coefficient VS V S/ T Low-level output voltage VOL Output leakage current IOH Circuit current while on ICCL Circuit current while off ICCH "H"transport delay time tPLH "L"transport delay time tPHL Operation limit voltage VOPL Output current while on 1 IOL1 Output current while on 2 IOL2 RL=470 VCC=L H L 1 RL=470 Ta=-20~+75°C 1 ±0.01 1 0.2 VCC=VS min. -0.05V RL=470 VCC=10.0V VCC=VS min. -0.05V RL=∞ VCC=VS typ. /0.85V RL=∞ 30 50 1 100 %/°C 0.4 V 0.1 µA 1 3.0 6.0 µA 1 2.0 4.0 µA RL=4.7k 7046~24 2 5 30 CL=100pF 7023~19 2 10 30 RL=4.7k 7046~24 2 30 70 CL=100pF 7023~19 2 70 150 1 0.65 0.85 RL=4.7k VOL <= 0.4V VCC=VS min. -0.05V RL=0 VCC=Vs min. -0.05V RL=0 Ta=-20°C~+75°C mV 1 8 1 5 30 µs µs V mA mA System Reset PST70XX MITSUMI Measuring Circuit [1] [2] *1 *2 0V *1 VS+0.4V *2 VS-0.4V