Octal FET Bus Switch
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.
By Texas Instruments
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