SN54LVTH16244A

具有三态输出的 3.3V ABT 16 位缓冲器/驱动器

The "LVTH16244A devices are 16-bit buffers and line drivers designed for low-voltage 3.3-V VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical active-low output-enable OE  inputs.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, 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.

These devices are 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 devices when they are 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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Members of the Texas Instruments Widebus Family

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State-of-the-Art Advanced BiCMOS

Technology ABT Design for 3.3-V

Operation and Low Static-Power

Dissipation

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Support Mixed-Mode Signal Operation

5-V Input and Output Voltages With

3.3-V VCC

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Support 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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Bus Hold on Data Inputs Eliminates the Need

for External Pullup/Pulldown Resistors

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Latch-Up Performance Exceeds 500 mA

Per JESD 17

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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