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| MITSUMI System Reset PST70XX 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 Vs2% max. Ultra-low current consumption ICCH=2A typ. ICCL=3A 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 VCC GND VOUT 1 3 1 2 VCC GND VOUT 2 3 1 2 3 TO-92A MMP-3A (TOP VIEW) MITSUMI System Reset PST70XX Equivalent Circuit Diagram Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss (Ta=25C) Symbol TSTG TOPR VCC max. Pd Rating -40~+125 -20~+75 -0.3~+10 200 (MMP-3A) 300 (TO-92A) Units C C V mW Electrical Characteristics Item (Ta=25C) (Except where noted otherwise, resistance unit is ) Symbol Measurement conditions Measurement circuit Min. Typ. Max. Units 4.6~ VS typ. 1.9 VS typ. -2% (0.1V +2% Step) 30 50 0.01 0.2 0.4 0.1 3.0 2.0 5 10 30 70 0.65 8 5 30 6.0 4.0 30 30 70 150 0.85 100 Detection voltage VS RL=470 VCC=H L 1 V Hysteresis voltage Detection voltage temperature coefficient Low-level output voltage Output leakage current Circuit current while on VS VS/ T VOL IOH ICCL ICCH tPLH tPHL VOPL IOL1 IOL2 RL=470 VCC=L H L 1 1 1 1 1 1 2 2 2 2 1 1 1 mV %/C V A A A s s V mA mA RL=470 Ta=-20~+75C VCC=VS min. -0.05V RL=470 VCC=10.0V VCC=VS min. -0.05V RL= VCC=VS typ. /0.85V RL= RL=4.7k CL=100pF RL=4.7k CL=100pF 7046~24 7023~19 7046~24 7023~19 Circuit current while off "H"transport delay time "L"transport delay time Operation limit voltage Output current while on 1 RL=4.7k VOL < 0.4V = VCC=VS min. -0.05V RL=0 VCC=Vs min. -0.05V RL=0 Ta=-20C~+75C Output current while on 2 MITSUMI System Reset PST70XX Measuring Circuit [1] [2] *1 *2 0V *1 VS+0.4V *2 VS-0.4V |
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