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Cell Library Browser (LEF)

Parse a LEF library and inspect its sites, routing layers, and standard cell macros — the geometric source of truth that placement and routing consume.

.lef text

Load file

VERSION 5.8 ;
BUSBITCHARS "[]" ;
DIVIDERCHAR "/" ;
UNITS
  DATABASE MICRONS 1000 ;
END UNITS

SITE core
  CLASS CORE ;
  SIZE 0.2 BY 1.4 ;
END core

LAYER M1
  TYPE ROUTING ;
  DIRECTION HORIZONTAL ;
  PITCH 0.2 ;
  WIDTH 0.07 ;
  SPACING 0.07 ;
END M1

MACRO AND2
  CLASS CORE ;
  SIZE 0.6 BY 1.4 ;
  SITE core ;
  PIN A   DIRECTION INPUT  ; USE SIGNAL ; PORT LAYER M1 ; RECT 0.0 0.4 0.1 0.6 ; END END A
  PIN B   DIRECTION INPUT  ; USE SIGNAL ; PORT LAYER M1 ; RECT 0.0 0.8 0.1 1.0 ; END END B
  PIN Y   DIRECTION OUTPUT ; USE SIGNAL ; PORT LAYER M1 ; RECT 0.5 0.6 0.6 0.8 ; END END Y
  PIN VDD DIRECTION INOUT  ; USE POWER  ; PORT LAYER M1 ; RECT 0.0 1.3 0.6 1.4 ; END END VDD
  PIN VSS DIRECTION INOUT  ; USE GROUND ; PORT LAYER M1 ; RECT 0.0 0.0 0.6 0.1 ; END END VSS
END AND2

MACRO BUF
  CLASS CORE ;
  SIZE 0.4 BY 1.4 ;
  SITE core ;
  PIN A DIRECTION INPUT  ; USE SIGNAL ; PORT LAYER M1 ; RECT 0.0 0.6 0.1 0.8 ; END END A
  PIN Y DIRECTION OUTPUT ; USE SIGNAL ; PORT LAYER M1 ; RECT 0.3 0.6 0.4 0.8 ; END END Y
END BUF

END LIBRARY