| 924321 | M27C256B-12B6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924322 | M27C256B-12B6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924323 | M27C256B-12B7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924324 | M27C256B-12B7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924325 | M27C256B-12C1 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924326 | M27C256B-12C1 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 924327 | M27C256B-12C1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924328 | M27C256B-12C1TR | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 924329 | M27C256B-12C1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924330 | M27C256B-12C3 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924331 | M27C256B-12C3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924332 | M27C256B-12C3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924333 | M27C256B-12C3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924334 | M27C256B-12C6 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924335 | M27C256B-12C6 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 924336 | M27C256B-12C6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924337 | M27C256B-12C6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924338 | M27C256B-12C6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924339 | M27C256B-12C7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
|
| 924340 | M27C256B-12C7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924341 | M27C256B-12F1 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924342 | M27C256B-12F1 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 924343 | M27C256B-12F1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924344 | M27C256B-12F1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924345 | M27C256B-12F3 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924346 | M27C256B-12F3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924347 | M27C256B-12F3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924348 | M27C256B-12F6 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924349 | M27C256B-12F6 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 924350 | M27C256B-12F6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924351 | M27C256B-12F6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924352 | M27C256B-12F7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924353 | M27C256B-12F7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924354 | M27C256B-12N1 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924355 | M27C256B-12N1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924356 | M27C256B-12N1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924357 | M27C256B-12N1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924358 | M27C256B-12N3 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924359 | M27C256B-12N3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924360 | M27C256B-12N3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
