| 780601 | M27C256B-25C7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780602 | M27C256B-25C7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780603 | M27C256B-25F1 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780604 | M27C256B-25F1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780605 | M27C256B-25F1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780606 | M27C256B-25F3 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780607 | M27C256B-25F3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780608 | M27C256B-25F3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780609 | M27C256B-25F6 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780610 | M27C256B-25F6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780611 | M27C256B-25F6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780612 | M27C256B-25F7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780613 | M27C256B-25F7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780614 | M27C256B-25N1 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780615 | M27C256B-25N1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780616 | M27C256B-25N1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780617 | M27C256B-25N1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780618 | M27C256B-25N3 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780619 | M27C256B-25N3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
|
| 780620 | M27C256B-25N3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780621 | M27C256B-25N3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780622 | M27C256B-25N6 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780623 | M27C256B-25N6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780624 | M27C256B-25N6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780625 | M27C256B-25N6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780626 | M27C256B-25N7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780627 | M27C256B-25N7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780628 | M27C256B-25XB1 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780629 | M27C256B-25XB1TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780630 | M27C256B-25XB1X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780631 | M27C256B-25XB3 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780632 | M27C256B-25XB3TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780633 | M27C256B-25XB3X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780634 | M27C256B-25XB6 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780635 | M27C256B-25XB6TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780636 | M27C256B-25XB6X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780637 | M27C256B-25XB7TR | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780638 | M27C256B-25XB7X | 256 Kbit (32Kb x 8) UV EPROM and OTP EPROM | ST Microelectronics |
| 780639 | M27C256B-25XC1 | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
| 780640 | M27C256B-25XC1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 250ns | SGS Thomson Microelectronics |
