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SNJ54LVTH241J Datasheet(PDF) 2 Page - Texas Instruments |
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SNJ54LVTH241J Datasheet(HTML) 2 Page - Texas Instruments |
2 / 17 page SN54LVTH241, SN74LVTH241 3.3V ABT OCTAL BUFFERS/DRIVERS WITH 3STATE OUTPUTS SCAS352K − MARCH 1994 − REVISED OCTOBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE should be tied to VCC through a pullup resistor and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing 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. FUNCTION TABLES INPUTS OUTPUT 1OE 1A OUTPUT 1Y L H H L LL H X Z INPUTS OUTPUT 2OE 2A OUTPUT 2Y H H H H LL L X Z logic diagram (positive logic) 1 218 1Y1 1OE 1A1 416 1Y2 1A2 614 1Y3 1A3 812 1Y4 1A4 19 11 9 2Y1 2OE 2A1 13 7 2Y2 2A2 15 5 2Y3 2A3 17 3 2Y4 2A4 |
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