| Nr. | Part Name | Description | Manufacturer by |
| 678001 | M27C256B-20XN3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678002 | M27C256B-20XN3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 678003 | M27C256B-20XN3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678004 | M27C256B-20XN6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 678005 | M27C256B-20XN6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678006 | M27C256B-20XN6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 678007 | M27C256B-20XN6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678008 | M27C256B-20XN7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678009 | M27C256B-20XN7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678010 | M27C256B-25B1 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678011 | M27C256B-25B1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678012 | M27C256B-25B1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678013 | M27C256B-25B3 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678014 | M27C256B-25B3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678015 | M27C256B-25B3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678016 | M27C256B-25B6 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678017 | M27C256B-25B6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678018 | M27C256B-25B6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678019 | M27C256B-25B7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678020 | M27C256B-25B7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678021 | M27C256B-25C1 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678022 | M27C256B-25C1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678023 | M27C256B-25C1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678024 | M27C256B-25C1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678025 | M27C256B-25C3 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678026 | M27C256B-25C3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678027 | M27C256B-25C3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678028 | M27C256B-25C3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678029 | M27C256B-25C6 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678030 | M27C256B-25C6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678031 | M27C256B-25C6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678032 | M27C256B-25C6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678033 | M27C256B-25C7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678034 | M27C256B-25C7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678035 | M27C256B-25F1 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678036 | M27C256B-25F1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678037 | M27C256B-25F1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678038 | M27C256B-25F3 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678039 | M27C256B-25F3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678040 | M27C256B-25F3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
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