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參數(shù)資料
| 型號： | MB89945PF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit Proprietary Microcontrolle |
| 中文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | PLASTIC, QFP-48 |
| 文件頁數(shù)： | 12/38頁 |
| 文件大?。?/td> | 197K |
| 代理商： | MB89945PF |
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MB89940 Series
12
I
HANDLING DEVICES
1.
Preventing Latchup
Latchup may occur on CMOS ICs if voltage higher than V
CC
or lower than V
SS
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 “
I
Electrical Characteristics” is applied between V
CC
and V
SS
.
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 (AV
CC
and AVR) and analog input from exceeding the digital
power supply (V
CC
) 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.
The VINT pin of MB89PV940 and MB89P945 is the only exception.
3.
Treatment of Power Supply Pins on Microcontrollers with A/D Converter
Connect to be AV
CC
= V
CC
and AV
SS
= V
SS
even if the A/D converter are not in use.
4.
Treatment of N.C. Pins
Be sure to leave (internally connected) N.C. pins open.
5.
Power Supply Voltage Fluctuations
Although V
CC
power supply voltage is assured to operate within the rated range, 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 V
CC
ripple fluctuations (P-P
value) will be less than 10% of the standard V
CC
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.
Note to Noise in the External Reset Pin (RST)
If the reset pulse applied to the external reset pin (RST) does not meet the specifications, it may cause
malfunctions. Use caution so that the reset pulse less than the specifications will not be fed to the external reset
pin (RST).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB89943 | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 20-LCCC -55 to 125 |
| MB89943PF | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CDIP -55 to 125 |
| MB8994x | Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CFP -55 to 125 |
| MB89PV940CF | 8-bit Proprietary Microcontroller |
| MB89P945PF | 8-bit Proprietary Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB8994X | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89951 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89951PFM | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89953 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89953PFM | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
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