參數(shù)資料
型號(hào)： MB90594G
廠(chǎng)商： Fujitsu Limited
英文描述： Quadruple 2-Input Positive-OR Gate 20-LCCC -55 to 125
中文描述： 16位微控制器專(zhuān)有
文件頁(yè)數(shù)： 14/51頁(yè)
文件大小： 714K
代理商： MB90594G
MB90590/590G Series
14
(4)Power supply pins (Vcc/Vss)
In products with multiple V
CC
or V
SS
pins, pins with the same potential are internally connected in the device to
avoid abnormal operations including latch-up. However, you must connect the pins to an external power 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 current rating.
Make sure to connect V
CC
and V
SS
pins via lowest impedance to power lines.
It is recommended to provide a bypass capacitor of around 0.1
μ
F between V
CC
and V
SS
pin near the device.
(5) Pull-up/down resistors
The MB90590/590G Series does not support internal pull-up/down resistors. Use external components where
needed.
(6) Crystal Oscillator Circuit
Noises around X0 or X1 pins may cause abnormal operations. Make sure to provide bypass capacitors via the
shortest distances from X0, X1 pins, crystal oscillator (or ceramic resonator) and ground lines, and make sure
that lines of oscillation circuits do not cross the lines of other circuits.
A printed circuit board artwork surrounding the X0 and X1 pins with a ground area for stabilizing the operation
is highly recommended.
(7) Turning-on Sequence of Power Supply to A/D Converter and Analog Inputs
Make sure to turn on the A/D converter power supply (AV
CC
, AVRH, AVRL) and analog inputs (AN0 to AN7)
after turning-on the digital power supply (V
CC
).
Turn-off the digital power after turning off the A/D converter supply and analog inputs. In this case, make sure
that the voltage does not exceed AVRH
or AV
CC
(turning on/off the analog and digital power supplies simulta-
neously is acceptable).
(8) Connection of Unused Pins of A/D Converter
Connect unused pins of A/D converter to AV
CC
= V
CC
, AV
SS
= AVRH = V
SS
.
Vcc
Vss
Vss
Vcc
Vss
Vcc
MB90590/590G
Series
Vcc
Vss
Vcc
Vss
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