| Part-No. | Specification | Pins | Type | Voltage | Organisation |
| 27C256-12D | 27C256-12 | 28 | UV-Eprom | 12,5V | 32K x 8 |
| 87C257-12D | 87C257-12 | 28 | Latch-UV-Eprom | 12,5V | 32K x 8 |
| 27C512-12D | 27C512 - 12 | 28 | UV-Eprom | 12,5V | 64K x 8 |
| 27C010-12D | 27C010-12, 27C1001-12 | 32 | UV-Eprom | 12,5V | 128K x 8 |