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SN74CB3T3125DGVR Datasheet(PDF) 2 Page - Texas Instruments |
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SN74CB3T3125DGVR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 12 page SN74CB3T3125 QUADRUPLE FET BUS SWITCH 2.5V/3.3V LOW VOLTAGE BUS SWITCH WITH 5V TOLERANT LEVEL SHIFTER SCDS120A − FEBRUARY 2003 − REVISED OCTOBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) VCC ≈VCC 5.5 V 0 V NOTE A: If the input high voltage (VIH) level is greater than or equal to VCC − 1 V, and less than or equal to 5.5 V, then the output high voltage (VOH) level will be equal to approximately the VCC voltage level. Input Voltages Output Voltages 0 V ≈VCC − 1 V ≈VCC − 1 V VCC IN OUT CB3T Figure 1. Typical DC Voltage-Translation Characteristics The SN74CB3T3125 is organized as four 1-bit bus switches with separate output-enable (1OE, 2OE, 3OE, 4OE) inputs. It can be used as four 1-bit bus switches or as one 4-bit bus switch. When OE is low, the associated 1-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 1-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 bus switch) INPUT INPUT/OUTPUT FUNCTION INPUT OE INPUT/OUTPUT A FUNCTION L B A port = B port H Z Disconnect |
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