| Product | Memory | Density | RAM | IF |
| ST31G480 | PAGE EEPROM | 480KB | 12KB | 7816/14443A/B/I2C |
| ST31G384 | PAGE EEPROM | 384KB | 12KB | 7816/14443A/B/I2C |
| ST31G320 | PAGE EEPROM | 320KB | 12KB | 7816/14443A/B/I2C |
| ST31G256 | PAGE EEPROM | 256KB | 12KB | 7816/14443A/B/I2C |
| ST31G128 | PAGE EEPROM | 128KB | 12KB | 7816/14443A/B/I2C |
