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PST621 Datasheet(PDF) 2 Page - Mitsumi Electronics, Corp. |
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PST621 Datasheet(HTML) 2 Page - Mitsumi Electronics, Corp. |
2 / 6 page MITSUMI System Reset (with battery back-up) PST620, 621 PST621 Pin No. Pin name Function 1 VAC Has +2.0V detection voltage to detect AC power supply and stable power supply primary side, for quick power outage detection. 2 VCC1 +5V main power supply 3 VCC2 Back-up power supply (back-up capacitor connected) 4 TC Pulse width setting pin for pulse shaver (capacitor and resistor connected) 5 RE --------------------------------------------------------------- Reset output 6 MODE Switches 1-chip microcomputer mode with pulse shaver output signal 7 CE Chip enable signal output (power outage detection signal) 8 GND GND Block Diagram PST620 PST621 Absolute Maximum Ratings (Ta=25°C) Item Symbol Rating Storage temperature TSTG -40~+125°C Operating temperature TOPR -20~+70°C Power supply voltage VCC max. -0.3~+10V TC input input voltage VC max. VCC1+0.3V Allowable loss Pd 450mW |
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