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SN74CBT3244DBLE Folha de dados(PDF) 2 Page - Texas Instruments |
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SN74CBT3244DBLE Folha de dados(HTML) 2 Page - Texas Instruments |
2 / 21 page SN74CBT3244 OCTAL FET BUS SWITCH SCDS001N − NOVEMBER 1992 − REVISED SEPTEMBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) The SN74CBT3244 provides eight bits of high-speed TTL-compatible bus switching. The SOIC, SSOP, TSSOP, and TVSOP packages provide a standard ’244 device pinout. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The device is organized as two 4-bit low-impedance switches with separate output-enable (OE) inputs. When OE is low, the switch is on, and data can flow from port A to port B, or vice versa. When OE is high, the switch is open, and the high-impedance state exists between the two ports. 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. FUNCTION TABLE (each 4-bit bus switch) INPUT OE FUNCTION L A port = B port H Disconnect logic diagram (positive logic) 1OE 1A1 1A4 1B1 1B4 2 8 1 18 12 2OE 2A1 2A4 2B1 2B4 11 17 19 9 3 Pin numbers shown are for the DB, DBQ, DGV, DW, RGY, and PW packages. |
Nº de peça semelhante - SN74CBT3244DBLE |
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Descrição semelhante - SN74CBT3244DBLE |
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