| 925121 | M27C256B-80XN6 | 256 Kbit (32Kb x 8) EPROM, 5V, 80ns | SGS Thomson Microelectronics |
| 925122 | M27C256B-80XN6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 80ns | SGS Thomson Microelectronics |
| 925123 | M27C256B-80XN6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925124 | M27C256B-80XN6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925125 | M27C256B-80XN7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925126 | M27C256B-80XN7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925127 | M27C256B-90B1 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925128 | M27C256B-90B1 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 925129 | M27C256B-90B1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925130 | M27C256B-90B1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925131 | M27C256B-90B3 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925132 | M27C256B-90B3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925133 | M27C256B-90B3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925134 | M27C256B-90B6 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925135 | M27C256B-90B6 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 925136 | M27C256B-90B6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925137 | M27C256B-90B6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925138 | M27C256B-90B7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925139 | M27C256B-90B7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
|
| 925140 | M27C256B-90C1 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925141 | M27C256B-90C1 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 925142 | M27C256B-90C1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925143 | M27C256B-90C1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925144 | M27C256B-90C1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925145 | M27C256B-90C3 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925146 | M27C256B-90C3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925147 | M27C256B-90C3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925148 | M27C256B-90C3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925149 | M27C256B-90C6 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925150 | M27C256B-90C6 | 256 KBIT (32KB X8) UV EPROM AND OTP EPROM | ST Microelectronics |
| 925151 | M27C256B-90C6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925152 | M27C256B-90C6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925153 | M27C256B-90C6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925154 | M27C256B-90C7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925155 | M27C256B-90C7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925156 | M27C256B-90F1 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925157 | M27C256B-90F1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925158 | M27C256B-90F1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 925159 | M27C256B-90F3 | 256 Kbit (32Kb x 8) EPROM, 5V, 90ns | SGS Thomson Microelectronics |
| 925160 | M27C256B-90F3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
