PST91XX

MITSUMI System Reset PST91XX System Reset Monolithic IC PST91XX Series Outline 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 systems. Further, this IC, with its super low consumption current and high precision voltage detection capacity, is most suited as a voltage check circuit for a number of products which use batteries. Features 1. High precision voltage detection Vs±3% max. 2. Super low current consumption ICCH=1.5µA typ. ICCL=1.0µA typ. 3. Low operating threshold voltage 0.65V typ. 4. Hysteresis voltage is provided as a detect voltage 50mV typ. 5. Large output current at the time ON 15mA typ. 6. The detect voltage can be selected at your discretion at 0.1V step within the range of 1.9 to 4.6V by the following stipulation method. PST91XX Detected voltage value (Example : for 4.2V ······ PST9142) Package TO-92A (PST91 SOT-25A (PST91 ) N) Applications 1. Reset circuits for microcomputers, CPU and MPU. 2. Reset circuit for logic circuitry. 3. Battery voltage check circuit. 4. Circuit for changing over to backup battery. 5. Level detecting circuit. Pin Assignment 5 1 2 3 1 2 3 VOUT VCC GND 1 2 4 1 2 NC SUB GND VOUT VCC 3 3 4 5 SOT-25A TO-92A (Note) The pin 2 of SOT-25 package is a SUB terminal. Connect it to GND. MITSUMI System Reset PST91XX Equivalent Circuit Diagram Absolute Maximum Ratings Item Storage t...