ASAP7 cell-name format¶

Verification snapshot for the ASAP7 7.5-track standard-cell library, used as the reference for openlithohub.data.asap7.resolve_cell_name.

Source: asap7sc7p5t_28/LEF/asap7sc7p5t_28_R_1x_220121a.lef Verified: 2026-05-22 via direct download (212 MACRO definitions, 373 KB).

Canonical pattern (7.5-track library)¶

<FUNC><DRIVE>_ASAP7_75t_<FLAVOR>

FUNC — functional name in caps: INV, NAND2, NOR2, AOI21, AO22, OAI332, XOR2, DFFHQNx, SDFHx, BUFx, MAJx, CKINVDC, ICG, ...
DRIVE — drive strength suffix: x1, x2, x4, x10, ..., or fractional xp33, xp5, xp67, x1p5, x6p67, x9p33. Fractional drives use p for the decimal separator.
FLAVOR — Vt / corner variant: R (regular), L (low-Vt — faster, leakier), SL (super-low-Vt), SRAM (SRAM-bitcell-adjacent variant).

Examples (verified, not guessed)¶

Function	Cell name
Inverter	`INVx1_ASAP7_75t_R`
2-NAND	`NAND2x1_ASAP7_75t_R`
2-NOR	`NOR2x1_ASAP7_75t_R`
AOI21	`AOI22xp5_ASAP7_75t_R`
Buffer	`BUFx2_ASAP7_75t_R`
DFF (Q,~Q)	`DFFHQNx1_ASAP7_75t_R`
DFF (Q)	`DFFHQx4_ASAP7_75t_R`
Scan-DFF	`SDFHx2_ASAP7_75t_R`
Clock-INV	`CKINVDCx20_ASAP7_75t_R`
ICG	`ICGx6p67DC_ASAP7_75t_R`
Filler	`FILLERxp5_ASAP7_75t_R`

Five LEF files in `LEF/` of the 7.5T submodule¶

File	Purpose
`asap7sc7p5t_28_R_1x_220121a.lef`	Regular-Vt cells (212 MACROs)
`asap7sc7p5t_28_L_1x_220121a.lef`	Low-Vt cells
`asap7sc7p5t_28_SL_1x_220121a.lef`	Super-low-Vt cells
`asap7sc7p5t_28_SRAM_1x_220121a.lef`	SRAM-bitcell-adjacent cells
`IO_cell/`	I/O ring / pad cells
`scaled/`	4× shrunk variants (the file-size-tagged 1x is the un-shrunk reference)

The 28 in asap7sc7p5t_28_* refers to the 2.8 nm-pitch fin grid (28 fin half-pitches). The 6T sibling library uses the analogous pattern: asap7sc6t_26_* (26 = 2.6 nm-pitch, 6-track height).

How `Asap7Dataset` consumes this¶

When the user passes a plain function name ("INV", "NAND2", "DFFHQ"), the dataset adapter resolves it transparently:

Default flavor="R", drive="x1", track="75" (smallest regular-Vt drive, 7.5-track library).
Compose f"{func}{drive}_ASAP7_{track}t_{flavor}".
Look up in the GDS by that exact string.

Set Asap7Dataset(..., resolve_shorthand=False) to opt out and require exact-match canonical names. The 6T variant uses _ASAP7_65t_ instead of _ASAP7_75t_; pass track="6" to resolve_cell_name to target it.

Out-of-scope here¶

Generating GDS cutouts of individual standard cells (vs. routed blocks) would require either (a) the cell-library GDS submodule download flow, or (b) an OpenROAD-driven flow that builds a tiny test design instantiating just those cells. The current adapter loads the cells directly from the asap7sc7p5t_27/GDS/ submodule. Cutting the cells from a routed design is a future enhancement.