Nova Electronics MCX514, Руководство пользователя

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NOVA electronics Inc. MCX514 -
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5.3 Input/Output Logic
Input A LVTTL Schmitt trigger input, which is high impedance because there is no pull high resister for those signals in this
IC.
Input is 5V tolerant. 3.3V and 5V type output (CMOS level and TTL level) can be connected.
The user should connect to GND or VDD if the input is not used.
Input B LVTTL Schmitt trigger input, which is pulled up with 50
kΩ in the IC.
Input is 5V tolerant. 3.3V and 5V type output (CMOS level and TTL level) can be connected.
The user should be Open or connect to VDD if the input is not used.
The signal with – F – symbol has an integral filter circuit in the internal input column of this IC.
Output A
It is 3.3V type CMOS level output, 6mA driving buffer (Hi level output current IOH=−6mA, VOH=2.6Vmin, Low level
output current IOL=6mA, VOL=0.4Vmax).
When in Hi level output, do not apply voltage more than the output voltage from outside.
5V type input can be connected when the other input is TTL level. If the other input is 5V type CMOS level, it cannot
be connected.
※ Note1
Output B It is open collector type output, 12mA driving buffer, (Low level output current IOL=12mA, VOL=0.4Vmax).
Pull up to +3.3V with high impedance if this output is used. It can also be connected to TTL level 5V type IC.
Bi-directional
A
Input side is 5V tolerant LVTTL Schmitt trigger. Because there is no pull high resister for those signals in this IC, the
user should pull up the data bus with high impedance.
The user should pull up to +3.3V with high impedance (about 10k~100
kΩ) when bits D15~D8, PIN6, 5 are not used.
When in Hi level output, do not apply voltage more than the output voltage from outside.
Output side is 3.3V type CMOS level output, 12mA
driving buffer (Hi level output current IOH=−12mA,
VOH=2.6Vmin, Low level output current IOL=12mA, VOL=0.4Vmax).
5V type bi-directional IC can be connected when the other input is TTL level. If the other input is 5V type CMOS level,
it cannot be connected.
※ Note1
Bi-directional
B
Input side is 5V tolerant LVTTL Schmitt trigger, which is pulled up with
50kΩ (Typ.) in the IC.
When in Hi level output, do not apply voltage more than the output voltage from outside.
Output side is 3.3V type CMOS level output, 6mA
driving buffer (Hi level output current IOH=−6mA, VOH=2.6Vmin,
Low level output current IOL=6mA, VOL=0.4Vmax).
5V type bi-directional IC can be connected when the other input is TTL level. If the other input is 5V type CMOS level,
it cannot be connected.
※ Note1
The signal with – F – symbol has an integral filter circuit in the internal input column of this IC.
Bi-directional
C
Input side is 5V tolerant LVTTL Schmitt trigger, which is pulled up with 100
kΩ (Typ.) in the IC.
Output side is activated during multichip axes interpolation. When signals are connected among chips in multichip
axes interpolation, please shorten the length of wiring as far as possible and do not cross other signal paths.
The user should be Open if the input is not used.
Bi-directional
D
I
2
C exclusive SDA signal.
Input side is 5V tolerant LVTTL Schmitt trigger. Because there is no pull high resister for those signals in this IC, the
user should pull up the data bus with high impedance.
Output side is open collector type output of 6mA driving buffer. When used as SDA signal, pull up to VDD through a
resistor.
The user should pull up to VDD with high impedance or connect to GND directly if this is not used.
Bi-directional
E
Input side is 5V tolerant LVTTL Schmitt trigger. Because there is no pull high resister for those signals in this IC, the
user should pull up the data bus with high impedance.
Output side is open collector type output.
When signals are connected among chips in multichip axes interpolation, please shorten the length of wiring as far
as possible and do not cross other signal paths.
The user should pull up to VDD with high impedance or connect to GND directly if this is not used.
Note1: Even if the output signals of output A and Bi-directional A, B are pulled up to 5V through resister, Hi level output voltage
cannot raise to Hi level input voltage of 5V type CMOS. Please don’t design the logic like this.