HT12E and HT12D under Microchip categoryPick Devices → Search HT12E / HT12DFile Integrity Check
Appendix
Alternative for Simulation: If you cannot find a dedicated "HT12" file, the M145026 (Encoder) and M145027 (Decoder) are direct equivalents already available in many extended Proteus databases and function identically. How to Add the Library to Proteus 8 ht12e and ht12d proteus library file download high quality
Overview of HT12E and HT12D
C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\LIBRARYC:\Program Files\Labcenter Electronics\Proteus 7 Professional\LIBRARY.LIB / .IDX files installed.