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SN74CBT16210C Datasheet(PDF) 2 Page - Texas Instruments |
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SN74CBT16210C Datasheet(HTML) 2 Page - Texas Instruments |
2 / 11 page SN74CBT16210C 20BIT FET BUS SWITCH 5V BUS SWITCH WITH 2V UNDERSHOOT PROTECTION SCDS115C − JANUARY 2003 − REVISED OCTOBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) The SN74CBT16210C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT16210C provides protection for undershoot up to −2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state. The SN74CBT16210C is organized as two 10-bit bus switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 10-bit bus switches or as one 20-bit bus switch. When OE is low, the associated 10-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the associated 10-bit bus switch is OFF, and the high-impedance state exists between the A and B ports. This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off. 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 10-bit bus switch) INPUT INPUT/OUTPUT FUNCTION INPUT OE INPUT/OUTPUT A FUNCTION L B A port = B port H Z Disconnect logic diagram (positive logic) 1A1 SW 1B1 1A10 1OE SW 1B10 2A1 SW 2B1 2A10 2OE SW 2B10 2 12 48 13 24 47 46 36 35 25 |
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