| 924401 | M27C256B-12XF6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924402 | M27C256B-12XF6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924403 | M27C256B-12XF7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924404 | M27C256B-12XF7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924405 | M27C256B-12XN1 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924406 | M27C256B-12XN1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924407 | M27C256B-12XN1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924408 | M27C256B-12XN1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924409 | M27C256B-12XN3 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924410 | M27C256B-12XN3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924411 | M27C256B-12XN3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924412 | M27C256B-12XN3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924413 | M27C256B-12XN6 | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924414 | M27C256B-12XN6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 120ns | SGS Thomson Microelectronics |
| 924415 | M27C256B-12XN6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924416 | M27C256B-12XN6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924417 | M27C256B-12XN7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924418 | M27C256B-12XN7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924419 | M27C256B-15B1 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
|
| 924420 | M27C256B-15B1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924421 | M27C256B-15B1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924422 | M27C256B-15B3 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 924423 | M27C256B-15B3 | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924424 | M27C256B-15B3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924425 | M27C256B-15B3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924426 | M27C256B-15B6 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 924427 | M27C256B-15B6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924428 | M27C256B-15B6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924429 | M27C256B-15B7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924430 | M27C256B-15B7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924431 | M27C256B-15C1 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 924432 | M27C256B-15C1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 924433 | M27C256B-15C1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924434 | M27C256B-15C1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924435 | M27C256B-15C3 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 924436 | M27C256B-15C3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 924437 | M27C256B-15C3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924438 | M27C256B-15C3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924439 | M27C256B-15C6 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 924440 | M27C256B-15C6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
