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MB89P131PFM-101 Datasheet(PDF) 10 Page - Fujitsu Component Limited. |
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MB89P131PFM-101 Datasheet(HTML) 10 Page - Fujitsu Component Limited. |
10 / 47 page MB89120/120A Series 10 s s s s HANDLING DEVICES 1. Preventing Latchup Latchup may occur on CMOS ICs if voltage higher than VCC or lower than VSS is applied to input and output pins other than medium- and high- voltage pins, or if higher than the voltage which shows on “1. Absolute Maximum Ratings” in “s ELECTRICAL CHARACTERISTICS” is applied between VCC and VSS. When latchup occurs, power supply current increases rapidly, and might thermally damage elements. When using, take great care not to exceed the absolute maximum ratings. Also, take care to prevent the analog power supply (AVCC and AVR) and analog input from exceeding the digital power supply (VCC) when the analog system power supply is turned on and off. 2. Treatment of Unused Input Pins Leaving unused input pins open could cause malfunctions. They should be connected to pull-up or pull-down resistor. 3. Treatment of N.C. Pins Be sure to leave (internally connected) N.C. pins open. 4. Power Supply Voltage Fluctuations Although operation is assured within the rated range of VCC power supply voltage, a rapid fluctuation of the voltage could cause malfunctions, even if it occurs within the rated range. Stabilizing voltage supplied to the IC is therefore important. As stabilization guidelines, it is recommended to control power so that VCC ripple fluctu- ations (P-P value) will be less than 10 % of the standard VCC value at the commercial frequency (50 to 60 Hz) and the transient fluctuation rate will be less than 0.1 V/ms at the time of a momentary fluctuation such as when power is switched. 5. Precautions when Using an External Clock When an external clock is used, oscillation stabilization time is required even for power-on reset (optional) and release from stop mode. 6. Turning on the supply voltage (only for the MB89P135A) When the power supply is turned on if MB89P135A is used, power on sharply up to 2.0 V within 13 clock cycles after starting of oscillation. Further, various option may be set, if power supply up to keep this condition. |
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