| Nr. | Part Name | Description | Manufacturer by |
| 677961 | M27C256B-20XB1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677962 | M27C256B-20XB1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677963 | M27C256B-20XB3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677964 | M27C256B-20XB3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677965 | M27C256B-20XB3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677966 | M27C256B-20XB6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677967 | M27C256B-20XB6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677968 | M27C256B-20XB6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677969 | M27C256B-20XB7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677970 | M27C256B-20XB7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677971 | M27C256B-20XC1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677972 | M27C256B-20XC1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677973 | M27C256B-20XC1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677974 | M27C256B-20XC1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677975 | M27C256B-20XC3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677976 | M27C256B-20XC3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677977 | M27C256B-20XC3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677978 | M27C256B-20XC3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677979 | M27C256B-20XC6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677980 | M27C256B-20XC6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677981 | M27C256B-20XC6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677982 | M27C256B-20XC6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677983 | M27C256B-20XC7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677984 | M27C256B-20XC7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677985 | M27C256B-20XF1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677986 | M27C256B-20XF1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677987 | M27C256B-20XF1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677988 | M27C256B-20XF3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677989 | M27C256B-20XF3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677990 | M27C256B-20XF3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677991 | M27C256B-20XF6 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677992 | M27C256B-20XF6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677993 | M27C256B-20XF6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677994 | M27C256B-20XF7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677995 | M27C256B-20XF7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677996 | M27C256B-20XN1 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677997 | M27C256B-20XN1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 677998 | M27C256B-20XN1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
| 677999 | M27C256B-20XN1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 678000 | M27C256B-20XN3 | 256 Kbit (32Kb x 8) EPROM, 5V, 200ns | SGS Thomson Microelectronics |
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