| No. | Nome della parte | Descrizione | Fabbricatore |
| 678041 | M27C256B-25F6TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678042 | M27C256B-25F6X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678043 | M27C256B-25F7TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678044 | M27C256B-25F7X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678045 | M27C256B-25N1 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678046 | M27C256B-25N1TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678047 | M27C256B-25N1TR | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678048 | M27C256B-25N1X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678049 | M27C256B-25N3 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678050 | M27C256B-25N3TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678051 | M27C256B-25N3TR | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678052 | M27C256B-25N3X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678053 | M27C256B-25N6 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678054 | M27C256B-25N6TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678055 | M27C256B-25N6TR | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678056 | M27C256B-25N6X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678057 | M27C256B-25N7TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678058 | M27C256B-25N7TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678059 | M27C256B-25N7X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678060 | M27C256B-25XB1 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678061 | M27C256B-25XB1TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678062 | M27C256B-25XB1X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678063 | M27C256B-25XB3 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678064 | M27C256B-25XB3TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678065 | M27C256B-25XB3X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678066 | M27C256B-25XB6 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678067 | M27C256B-25XB6TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678068 | M27C256B-25XB6X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678069 | M27C256B-25XB7TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678070 | M27C256B-25XB7X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678071 | M27C256B-25XC1 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678072 | M27C256B-25XC1TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678073 | M27C256B-25XC1TR | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678074 | M27C256B-25XC1X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678075 | M27C256B-25XC3 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678076 | M27C256B-25XC3TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678077 | M27C256B-25XC3TR | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678078 | M27C256B-25XC3X | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
| 678079 | M27C256B-25XC6 | 256 KBytes (32 KB x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 678080 | M27C256B-25XC6TR | 256 Kbit (32Kb x 8) EPROM ed OTP UV EPROM | ST Microelectronics |
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