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參數(shù)資料
| 型號： | MB95F168NPMC1 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 16.25 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LFQFP-64 |
| 文件頁數(shù)： | 6/76頁 |
| 文件大?。?/td> | 1492K |
| 代理商： | MB95F168NPMC1 |
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MB95160M Series
14
■ HANDLING DEVICES
Preventing Latch-up
Care must be taken to ensure that maximum voltage ratings are not exceeded when they are used.
Latch-up 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-withstand voltage pins or if higher than the rating voltage is applied between VCC
pin and VSS pin.
When latch-up occurs, power supply current increases rapidly and might thermally damage elements.
Stable Supply Voltage
Supply voltage should be stabilized.
A sudden change in power-supply voltage may cause a malfunction even within the guaranteed operating range
of the Vcc power-supply voltage.
For stabilization, in principle, keep the variation in Vcc ripple (p-p value) in a commercial frequency range
(50/60 Hz) not to exceed 10% of the standard Vcc value and suppress the voltage variation so that the transient
variation rate does not exceed 0.1 V/ms during a momentary change such as when the power supply is switched.
Precautions for Use of External Clock
Even when an external clock is used, oscillation stabilization wait time is required for power-on reset, wake-up
from sub clock mode or stop mode.
PIN CONNECTION
Treatment of Unused Pin
Leaving unused input pins unconnected can cause abnormal operation or latch-up, leaving to permanent dam-
age. Unused input pins should always be pulled up or down through resistance of at least 2 k
. Any unused
input/output pins may be set to output mode and left open, or set to input mode and treated the same as unused
input pins. If there is unused output pin, make it to open.
Power Supply Pins
In products with multiple VCC or VSS pins, the pins of the same potential are internally connected in the device
to avoid abnormal operations including latch-up. However, you must connect the pins to external power supply
and a ground line to lower the electro-magnetic emission level, to prevent abnormal operation of strobe signals
caused by the rise in the ground level, and to conform to the total output current rating.
Moreover, connect the current supply source with the VCC and VSS pins of this device at the low impedance.
It is also advisable to connect a ceramic bypass capacitor of approximately 0.1
F between VCC and VSS pins
near this device.
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