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SN74LV244AT Datasheet(PDF) 2 Page - Texas Instruments |
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SN74LV244AT Datasheet(HTML) 2 Page - Texas Instruments |
2 / 17 page www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) 1 2 18 1Y1 1OE 1A1 4 16 1Y2 1A2 6 14 1Y3 1A3 8 12 1Y4 1A4 19 11 9 2Y1 2OE 2A1 13 7 2Y2 2A2 15 5 2Y3 2A3 17 3 2Y4 2A4 SN74LV244AT OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SCES572C – JUNE 2004 – REVISED AUGUST 2005 To ensure the high-impedance state during power up or power down, OE shall be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. FUNCTION TABLE (EACH 4-BIT BUFFER/DRIVER) INPUTS OUTPUT Y OE A L H H L L L H X Z LOGIC DIAGRAM (POSITIVE LOGIC) 2 |
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