JAJSON0F December 1982 – May 2022 SN54HC244 , SN74HC244
PRODUCTION DATA
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The SNx4HC244 device is organized as two 4-bit buffers and 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.