参数资料
型号: MB89P195APF-201PFE1
厂商: FUJITSU LTD
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 4.2 MHz, MICROCONTROLLER, PDSO28
封装: PLASTIC, SOP-28
文件页数: 4/41页
文件大小: 451K
代理商: MB89P195APF-201PFE1
MB89190/190A Series
12
s HANDLING DEVICES
1. Preventing Latch-up
Latchup may occur on CMOS ICs if voltage higher than VCC or lower than VSS is applied to input or 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 to 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 Power Supply Pins on Microcontrollers with A/D and D/A Converters
Connect to be AVCC=DAVC=VCC and AVSS=AVR=VSS even if the A/D and D/A converters are not in use.
4. Treatment of N.C. Pin
Be sure to leave (internally connected) N.C. pins open.
5. 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 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.
6. Precautions when Using an External Clock
Even when an external clock is used, oscillation stabilization time is required for power-on reset (optional) and
release from stop mode.
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