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SN54ALVTH16244 Datasheet(PDF) 2 Page - Texas Instruments |
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SN54ALVTH16244 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 10 page SN54ALVTH16244, SN74ALVTH16244 2.5-V/3.3-V 16-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCES070G – JUNE 1996 – REVISED MAY 1999 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description (continued) When VCC is between 0 and 1.2 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.2 V, the output-enable (OE) input 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. These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict. The SN54ALVTH16244 is characterized for operation over the full military temperature range of –55 °C to 125 °C. The SN74ALVTH16244 is characterized for operation from –40°C to 85°C. FUNCTION TABLE (each buffer) INPUTS OUTPUT OE A Y L H H L LL H X Z logic diagram (positive logic) 1OE 1A1 1A2 1A3 1A4 1Y1 1Y2 1Y3 1Y4 1 47 46 44 43 2 3 5 6 2OE 2A1 2A2 2A3 2A4 2Y1 2Y2 2Y3 2Y4 48 41 40 38 37 8 9 11 12 3OE 3A1 3A2 3A3 3A4 3Y1 3Y2 3Y3 3Y4 25 36 35 33 32 13 14 16 17 4OE 4A1 4A2 4A3 4A4 4Y1 4Y2 4Y3 4Y4 24 30 29 27 26 19 20 22 23 |
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