逻辑
RS244-Q1
This RS244-Q1 is an octal non-inverting buffer/driver with 3-state outputs. The 3-state outputs are controlled by the output enable inputs 1OE̅̅̅̅ and 2OE̅̅̅̅. A HIGH on OE̅̅̅̅ causes the outputs to assume a high impedance OFF-state. VCC supporting operating voltage from 1.65 V to 5.5 V.
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