SN74LVT245B

具有三态输出的 3.3V ABT 八路总线收发器

This octal bus transceiver is designed specifically for low-voltage 3.3-V VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control DIR input. The output-enable OE\ input can be used to disable the device so the buses are effectively isolated.

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.

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Supports Mixed-Mode Signal Operation 5-V Input and Output Voltages With 3.3-V VCC

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Supports Unregulated Battery Operation Down to 2.7 V

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Typical VOLP Output Ground Bounce

   <0.8 V at VCC = 3.3 V, TA = 25°C

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Ioff and Power-Up 3-State Support Hot Insertion

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Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

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ESD Protection Exceeds JESD 22

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2000-V Human-Body Model A114-A

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200-V Machine Model A115-A

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1000-V Charged-Device Model C101