20-Bit Buffer/Driver With 3-State Outputs

A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1 shows typical VOL vs IOL and VOH vs IOH curves to illustrate the output impedance and drive capability of the circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is equivalent to a high-drive standard-output device. For more information, refer to the TI application reports, AVC Logic Family Technology and Applications, literature number SCEA006, and Dynamic Output Control (DOCTM) Circuitry Technology and Applications, literature number SCEA009.
This 20-bit noninverting Buffer driver is operational at 1.2-V to 3.6-V VCC, but is designed specifically for 1.65-V to 3.6-V VCC operation.
The SN74AVC16827 is composed of two 10-bit sections with separate output-enable signals. For either 10-bit Buffer section, the two output-enable (1OE1 and 1OE2 or 2OE1 and 2OE2) inputs must both be low for the corresponding Y outputs to be active. If either output-enable input is high, the outputs of that 10-bit Buffer section are in the high-impedance state.
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 partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
The SN74AVC16827 is characterized for operation from -40C to 85C.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN74AVC16827DGGR Texas Instruments 20-Bit Buffer/Driver With 3-State Outputs 56-TSSOP -40 to 85
SN74AVC16827DGVR Texas Instruments 20-Bit Buffer/Driver With 3-State Outputs 56-TVSOP -40 to 85
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SN74AVC16827 Pinout, Pinouts
SN74AVC16827 pinout,Pin out
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