| Part No. | Pin assign (Picture) |
PIN Count | Description | Maker,First source,Second source etc. |
| 2704 | 24 | 4k UV-EPROM | Intel 2704 EA2704L NS MM2704 Signetics N2704 TOSHIBA TMM321C | |
| 27256 | 28 | 256k UV-EPROM | Intel i27256(UV-EPROM) | |
| TOSHIBA TC53257P(MASK ROM) TOSHIBA TC54256P(OTP-ROM) TOSHIBA TC54256AP(OTP-ROM) TOSHIBA TC57256D(UV-PEROM) TOSHIBA TC57256AD(UV-PEROM) TOSHIBA TMM23256P(MASK ROM) TOSHIBA TMM24256P(OTP-ROM) TOSHIBA TMM24256BP(OTP-ROM) TOSHIBA TMM27256D(UV-EPROM) TOSHIBA TMM27256AD(UV-EPROM) TOSHIBA TMM27256BD(UV-EPROM) | ||||
| TOSHIBA TC53257F(SOP)(MASK ROM) TOSHIBA TC54256AF(SOP)(OTP-ROM) TOSHIBA TMM24256BF(SOP)(OTP-ROM) |
