The µPD4723 is a high-breakdown voltage silicon gate CMOS line driver/receiver based on the EIA/TIA-232-E standard. The internal DC/DC converter can switch between multiple voltages, allowing it to operate with a single +3.3 V or +5 V power supply.
The HN58C1001FP is an electrically erasable and programmable ROM organized as 131072-word × 8- bit. It has realized high speed, low power consumption and high reliability by employing advanced MNOS memory technology.
The 2SC3228-Y transistor can have a current gain of 160 to 320. The gain of the 2SC3228 will be in the range from 60 to 320, for the 2SC3228-R it will be in the range from 60 to 120.