Hi, team,
Just need to double confirm with you about SN74HC00-Q1 output status under different input.
In datasheet, below three input and output is described.
How about output when A=H, B=X?
How about output when A=X, B=H?
Thanks.
Johnny
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Hi, team,
Just need to double confirm with you about SN74HC00-Q1 output status under different input.
In datasheet, below three input and output is described.
How about output when A=H, B=X?
How about output when A=X, B=H?
Thanks.
Johnny
Hi Johnny,
X means "don't care" or, more specifically, the input could be either HIGH or LOW, and the output remains the same.
The "X" is used to reduce the truth table from 4 lines to 3. The full truth table is:
A | B | Y |
H | H | L |
L | H | H |
H | L | H |
L | L | H |