參數(shù)資料
型號(hào)： MB90440G
廠商： Fujitsu Limited
英文描述： Octal D-Type Edge-Triggered Flip-Flops with 3-State Outputs 20-CDIP -55 to 125
中文描述： 16位微控制器專(zhuān)有
文件頁(yè)數(shù)： 35/61頁(yè)
文件大小： 644K
代理商： MB90440G
MB90440G Series
35
(Continued)
The
+
B signal should always be applied with a limiting resistance placed between the
+
B signal and the
microcontroller.
The value of the limiting resistance should be set so that
+
B signal is applied the input current to the
microcontroller pin does not exceed rated values, either instantaneously or for prolonged periods.
Note that when the microcontroller drive current is low, such as in the power saving modes, the
+
B input
potential may pass through the protective diode and increase the potential at the V
CC
pin, and this may affect
other devices.
Note that if a
+
B signal is input when the microcontroller power supply is off (not fixed at 0 V) , the power
supply is provided from the pins, so that incomplete operation may result.
Note that if the
+
B input is applied during power-on, the power supply is provided from the pins and the
resulting supply voltage may not be sufficient to operate the power-on reset.
Care must be taken not to leave the
+
B input pin open.
Note that analog system input/output pins other than the A/D input pins (LCD drive pins, comparator input
pins, etc.) cannot accept
+
B signal input.
Sample recommended circuits.
WARNING:
Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.
P-ch
N-ch
Vcc
R
Input/Output equivalent circuits
+
B input (0 V to 16 V)
Limiting
resistance
Protective diode
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