Page 46 - Digital Electronics by harish
P. 46
Tristate buffer
The symbol and truth table of Tristate buffer are shown in figure.
ENABLE Input (A) Output (Y)
X High
0
(0 or 1) impedance
1 0 0
1 1 1
When the buffer is enabled, the output follows the input. When the buffer is not enabled (ie.
disabled), the output will be in high impedance state.
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