| Nr. | Part Name | Description | Manufacturer by |
| 677881 | M27C256B-15XC6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677882 | M27C256B-15XC6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677883 | M27C256B-15XC7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677884 | M27C256B-15XC7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677885 | M27C256B-15XF1 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677886 | M27C256B-15XF1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677887 | M27C256B-15XF1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677888 | M27C256B-15XF3 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677889 | M27C256B-15XF3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677890 | M27C256B-15XF3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677891 | M27C256B-15XF6 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677892 | M27C256B-15XF6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677893 | M27C256B-15XF6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677894 | M27C256B-15XF7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677895 | M27C256B-15XF7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677896 | M27C256B-15XN1 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677897 | M27C256B-15XN1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677898 | M27C256B-15XN1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677899 | M27C256B-15XN1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677900 | M27C256B-15XN3 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677901 | M27C256B-15XN3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677902 | M27C256B-15XN3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677903 | M27C256B-15XN3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677904 | M27C256B-15XN6 | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677905 | M27C256B-15XN6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677906 | M27C256B-15XN6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 150ns | SGS Thomson Microelectronics |
| 677907 | M27C256B-15XN6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677908 | M27C256B-15XN7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677909 | M27C256B-15XN7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677910 | M27C256B-20B1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677911 | M27C256B-20B1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677912 | M27C256B-20B1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677913 | M27C256B-20B3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677914 | M27C256B-20B3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677915 | M27C256B-20B3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677916 | M27C256B-20B6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677917 | M27C256B-20B6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677918 | M27C256B-20B6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677919 | M27C256B-20B7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677920 | M27C256B-20B7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
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