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SN74LVT245BPW 数据表(PDF) 2 Page - Texas Instruments |
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SN74LVT245BPW 数据表(HTML) 2 Page - Texas Instruments |
2 / 15 page SN74LVT245B 3.3V ABT OCTAL BUS TRANSCEIVER WITH 3STATE OUTPUTS SCES004H − JANUARY 1995 − REVISED SEPTEMBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) 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. This device is 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 device when it is 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. terminal assignments 1234 A A1 DIR VCC OE B A3 B2 A2 B1 C A5 A4 B4 B3 D A7 B6 A6 B5 E GND A8 B8 B7 FUNCTION TABLE INPUTS OPERATION OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation logic diagram (positive logic) DIR OE A1 B1 To Seven Other Channels 1 2 19 18 Pin numbers shown are for the DB, DW, NS, PW, and RGY packages. GQN OR ZQN PACKAGE (TOP VIEW) 1 234 A B C D E |
类似零件编号 - SN74LVT245BPW |
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类似说明 - SN74LVT245BPW |
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