| 924521 | M27C256B-15XN7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924522 | M27C256B-20B1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924523 | M27C256B-20B1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924524 | M27C256B-20B1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924525 | M27C256B-20B3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924526 | M27C256B-20B3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924527 | M27C256B-20B3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924528 | M27C256B-20B6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924529 | M27C256B-20B6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924530 | M27C256B-20B6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924531 | M27C256B-20B7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924532 | M27C256B-20B7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924533 | M27C256B-20C1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924534 | M27C256B-20C1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924535 | M27C256B-20C1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924536 | M27C256B-20C1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924537 | M27C256B-20C3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924538 | M27C256B-20C3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924539 | M27C256B-20C3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
|
| 924540 | M27C256B-20C3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924541 | M27C256B-20C6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924542 | M27C256B-20C6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924543 | M27C256B-20C6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924544 | M27C256B-20C6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924545 | M27C256B-20C7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924546 | M27C256B-20C7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924547 | M27C256B-20F1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924548 | M27C256B-20F1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924549 | M27C256B-20F1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924550 | M27C256B-20F3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924551 | M27C256B-20F3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924552 | M27C256B-20F3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924553 | M27C256B-20F6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924554 | M27C256B-20F6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924555 | M27C256B-20F6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924556 | M27C256B-20F7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924557 | M27C256B-20F7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 924558 | M27C256B-20N1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924559 | M27C256B-20N1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 924560 | M27C256B-20N1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
