Tiny Tapeout GF 0.1 · Made on a GlobalFoundries private MPW run

Pad test buffer

BUFR · Test structures · 0.225 × 0.075 mm

Rendered from the layout at 0.33 µm per pixel. Layers: NwellDiffusionPolysiliconMetal 1Metal 2Metal 3Metal 4Metal 5Top metalPad openings

4 logic cells: too few for density figures, which are given for projects of 1,000 or more.

Every figure here is measured from the public layout, the same way for every design on the chip: see data and method, and how its designs used the process.

Connects four of the chip's pins straight to the controls of a test input/output pad, so the pad cell can be driven directly, and ties off the loopback pads

Size225 × 75 µm (0.017 mm²)
Celltt_buffer_macro
Transistors1,836
Logic cells4 + 248 filler and tap cells
Libraries 7t-5V (4)
SRAMNo SRAM

Process features

Which parts of the GF180MCU process this design uses: its transistor voltages and where they come from, its gate oxides, and any devices drawn by hand outside the standard cells, SRAM and pads.

5 V7t-5V standard cells
Gate oxidesThick only (5 V/6 V) in the design itself

Where the area went

How this project's area splits between logic cells, filler and tap cells and other.

51%
48%
  • Logic cells 123 µm² (1%)
  • Filler and tap cells 0.01 mm² (51%)
  • Other 0.01 mm² (48%)

Most used cells

The ten standard cells this design uses most.

CellLibraryInstancesWhat it does
buf_47t-5V 4Buffer (4x drive)

Want your own design on a chip like this one?

Start with a tile: the next Tiny Tapeout GF180MCU chips take projects until 7 December 2026, for wafer.space Run 3. For a die of your own, wafer.space Run 3 takes orders until 9 December 2026.

Tiny Tapeout and wafer.space are independent companies that work together (announcement). Tiny Tapeout runs its own shuttles: it takes the projects, builds the die, and sells and supports the chips and boards. wafer.space has the dies manufactured on its GF180MCU runs, and these pages are wafer.space's measurements of them. For anything about a Tiny Tapeout project, chip or order, contact Tiny Tapeout.