PST573 MITSUMI | Alldatasheet
Document overview
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Technical content
Features
- Ultra-low current consumption I CCH=450µA typ. ICCL=1µA typ. 2. Low operating limit voltage 0.65V typ. 3. Output current high for ON -6mA typ. 4. Hysteresis voltage provided in detection voltage 50mV typ. D : 4.2V typ. I : 2.9V typ. E : 3.9V typ. J : 2.7V typ. F : 3.6V typ. K : 2.5V typ. G : 3.3V typ. L : 2.3V typ. Package MMP-3A (PST573 M) TO-92A (PST573 ) * contains detection voltage rank .
Applications
- Reset circuits in microcomputers, CPUs and MPUs. 2. Logic circuit reset circuits. 3. Battery voltage check circuits. 4. Back-up power supply switching circuits. 5. Level detection circuits. Pin Assignment 123 TO-92A
1 VCC
2 GND
3 VOUT
MITSUMI System Reset PST573 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 200(MMP-3A) mW 300(TO-92A) Electrical Characteristics (Ta=25°C) (Except where noted otherwise, resistance unit is Ω ) Item Symbol Measurement Measurement conditions Min. Typ. Max. Unitscircuit PST573C 4.3 4.5 4.7 PST573D 4.0 4.2 4.4 PST573E 3.7 3.9 4.1 RL=4.7k PST573F 3.4 3.6 3.8 Detection voltage VS 1V OL <= VCC-0.4V PST573G 3.1 3.3 3.5 V VCC=H L PST573H 2.9 3.1 3.3 PST573I 2.75 2.90 3.05 PST573J 2.55 2.70 2.85 PST573K 2.35 2.50 2.65 PST573L 2.15 2.30 2.45 Hysteresis voltage VS 1 RL=4.7kΩ 25 50 100 mVVCC=L H L Detection voltage RL=4.7kΩVS/ T 1 ±0.01 %/°Ctemperature coefficient Ta=-20°C~+75°C High level output voltage VOH 1 VCC=VS min. -0.05V V CC VRL=4.7kΩ -0.4 Output leakage current IOH 1V CC=7.5V ±0.1 µA Circuit current while on ICCL 1 VCC=VS min. -0.05V 450 700 µARL=∞ Circuit current while off ICCH 1 VCC=VS typ. /0.85V 1.0 1.8 µARL=∞ "H"transport delay time tpLH 2 RL=4.7kΩ *1 25 60 µSCL=100pF "L"transport delay time tpHL 2 RL=4.7kΩ *1 82 0 µ SCL=100pF Operation limit voltage VopL 1 RL=4.7kΩ 0.65 0.85 VVOL >= VCC-0.4V Output current while on I IOL I1 VCC=VS min.-0.05V -2.0 -6.0 mARL=0 Output current while on II IOL II 1 Ta=-20°C~+75°C *2 -1.5 mARL=0 *2 : VCC=VS min.-0.15V
MITSUMI System Reset PST573 Measuring Circuit [1] [2] INPUT PULSE 4.1V 4.9V 0.8V VS 4.9 4.1 Note: Input model is an example for PST573C. Characteristics (Example: PST573C) VCC vs. VOUT VCC vs. ICC 012345678 VOUT (V) VCC (V) Ta=-20°C Ta=25°C Ta=75°C 600 500 400 300 200 100 0 01 234 567 8 ICC (µA) VCC (V) Ta=-20°C Ta=25°C Ta=75°C
MITSUMI System Reset PST573 VS vs. Ta V S vs. Ta -40 -20 0 20 40 60 80 4.47 4.48 4.49 4.50 4.51 4.52 4.53 VS (V) Ta (°C) VS (mV) Ta (°C) -40 -20 0 20 40 60 80 IOL vs. Ta V OH vs. Ta -40 -2 00 2 04 06 08 0 IOL (mA) Ta (°C) -40 -20 0 20 40 60 80 4.95 4.00 4.05 4.10 4.15 4.20 4.25 VOH (V) Ta (°C) ICCH vs. Ta I CCL vs. Ta 1.8 1.6 1.4 1.2 1.0 0.8 0.6 -40 -2 00 2 04 06 08 0 ICCH (µA) Ta (°C) 600 700 500 400 300 200 100 -40 -2 00 2 04 06 08 0 lCCL (µA) Ta (°C) CL (RL) vs. tPLH Pd vs. Ta VS (CPU)=0.7VCC 10.0 1.0 0.1 0.01 23 4 57 CL (µF) 1 23 4 5710 23 4 57100 1000 TPLH (mS) RL=10k RL=100k RL=470k 300 200 00 25 50 75 100 125 100 Pd (mW) Ta (°C)
MITSUMI System Reset PST573 Timing Chart VCC/VOUT (V) RESET VCC VOUT VS VS (CPU) Time ON OFF Undefined Application circuits 1. Normal hard reset Delay time (tpLH) .=. CL RL ln VCC-0.2 +0.025 (mS)Vscpu CL : µF RL : kΩ Vs cpu : Reset threshold voltage of CPU, MPU, etc. Voltage: V Note: Connect a capacitor between IC pins 1 and 2 if V CC line impedance is high. 2. Manual reset added Note 1: Use RL, CL and Rm to prevent manual switch chattering. Note that Rm should be set to the following conditions. Rm <= 1/20R L Note 2: Connect a capacitor between IC pins 1 and 2 if VCC line impedance is high. 3. Battery checker (LED ON for high voltage) Note: Connect a capacitor between IC pins 1 and 2 if VCC line impedance is high.
MITSUMI System Reset PST573
4 Battery checker (LED ON for low voltage)
Note: Connect a capacitor between IC pins 1 and 2 if VCC line impedance is high. 5. Hysteresis voltage UP method When increasing hysteresis voltage for stable system operation, determine RH as follows and connect externally. However, I CCH is -5000PPM/°C, so perform temperature compensation at RH when using over a wide temperature range. Hysteresis voltage UP amount ( Vsup) is Vsup .=. RH I CCL Total hysteresis voltage ( Vstotal) is Vstotal .=. Vs + Vsup Note: Connect a capacitor between IC pins 1 and 2 if VCC line impedance is high.