| Field | Example codes | |--------------|----------------------------------------| | Function | INV, NAND2, DFFR, AOI21 | | Drive | X0.5, X1, X2, X4, X8, X16 | | Vt | LVT, RVT, HVT, ULVT, ELVT | | Physical | _D, _P, _F, _CK, _ISO, _LS | | Track height | 6T, 7.5T, 9T (node dependent) |
Older nodes (e.g., 180nm, 130nm) may use SVT (Standard Vt) instead of RVT. 3.4 Physical Variant Modifiers These indicate special layout arrangements. tsmc standard cell naming convention
| Code | Relative drive | |------|----------------| | X0.5 | Ultra-weak | | X1 | Unit drive | | X2 | 2× unit | | X4 | 4× unit | | X8 | 8× unit | | X16 | Max drive | AOI21 | | Drive | X0.5