Canon F-7

The Palmtronic F-7 was introduced shortly after the Texas Instruments SR-50 and uses a very similar calculator architecture developed by Hitachi. Instead the single-chip calculator chips found inside the F-5 and F-6 models, it uses a processing chip (CPU) HD3650 surrounded by a Read Only Memory (ROM) HD3651, a T-CHIP (Timing Chip) HD3653 and the HD3666 labelled PUC. The same CPU was used in the desktop sized Canola F-11 and the metric conversion calculator FC-80.