Primitive: Differential 3-state Output Buffer
- PRIMITIVE_GROUP: I/O
- PRIMITIVE_SUBGROUP: OUTPUT_BUFFER
- Families: UltraScale, UltraScale+
Introduction
The OBUFTDS is a differential 3-state output buffer primitive.
I/O attributes that do not impact the logic function of the component, such as IOSTANDARD and SLEW, should be supplied to the top-level port via an appropriate property. For details on applying such properties to the associated port, see the Vivado Design Suite Properties Reference Guide (UG912).
Logic Table
| Inputs | Outputs | ||
|---|---|---|---|
| I | T | O | OB |
| X | 1 | Z | Z |
| 0 | 0 | 0 | 1 |
| 1 | 0 | 1 | 0 |
Port Descriptions
| Port | Direction | Width | Function |
|---|---|---|---|
| I | Input | 1 | Buffer input. |
| O | Output | 1 | Diff_p output. Connect directly to a top-level port in the design. |
| OB | Output | 1 | Diff_n output. Connect directly to a top-level port in the design. |
| T | Input | 1 | 3-state enable input. |
Design Entry Method
| Instantiation | Yes |
| Inference | No |
| IP and IP Integrator Catalog | No |