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參數(shù)資料
| 型號(hào)： | MB89W665C-SH |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, UVPROM, 10 MHz, MICROCONTROLLER, CDIP64 |
| 封裝： | WINDOWED, SHRINK, CERAMIC, DIP-64 |
| 文件頁數(shù)： | 3/47頁 |
| 文件大?。?/td> | 649K |
| 代理商： | MB89W665C-SH |
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11
MB89660R Series
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 section “ 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 a pull-up or pull-down
resistor.
3. Treatment of Power Supply Pins on Microcontrollers with A/D Converters
Connect to be AVCC = VCC and AVSS = AVR = VSS if the A/D converters are not in use.
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
fluctuations (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
wake-up from stop mode.
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