ZHCSS47O October 1995 – July 2024 SN54AHCT244 , SN74AHCT244
PRODMIX
請參考 PDF 數據表獲取器件具體的封裝圖。
The SNx4AHCT244 devices are organized as two 4-bit buffers/line drivers with separate output-enable ( OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.