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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  27C256-70 | 256K-BIT [32K x 8] CMOS EPROM | Macronix International | MCNIX | - | - | - | 777 Kb |
| 2. | 27C256-70 | 256K-BIT [32K x 8] CMOS EPROM | Macronix International | MCNIX | - | - | - | 777 Kb |
| 3. | AM27C256-70 | 256 Kilobit (32,768 x 8-Bit) CMOS EPROM | Advanced Micro Devices | AMD | - | - | - | 103 Kb |
| 4. | CY27C256-70 | 32K x 8-Bit CMOS EPROM | Cypress Semiconductor | CYPRESS | - | - | - | 271 Kb |
| 5. | AM27C256-70DC | 256 Kilobit (32 K x 8-Bit) CMOS EPRO | Advanced Micro Devices | AMD | - | - | - | 94 Kb |
| 6. | AM27C256-70DCB | 256 Kilobit (32 K x 8-Bit) CMOS EPRO | Advanced Micro Devices | AMD | - | - | - | 94 Kb |
| 7. | AM27C256-70DE | 256 Kilobit (32 K x 8-Bit) CMOS EPRO | Advanced Micro Devices | AMD | - | - | - | 94 Kb |
| 8. | AM27C256-70DEB | 256 Kilobit (32 K x 8-Bit) CMOS EPRO | Advanced Micro Devices | AMD | - | - | - | 94 Kb |
| 9. | AM27C256-70DI | 256 Kilobit (32 K x 8-Bit) CMOS EPRO | Advanced Micro Devices | AMD | - | - | - | 94 Kb |
| 10. | AM27C256-70DIB | 256 Kilobit (32 K x 8-Bit) CMOS EPRO | Advanced Micro Devices | AMD | - | - | - | 94 Kb |
| 11. | AM27C256-70EC | 256 Kilobit (32,768 x 8-Bit) CMOS EPROM | Advanced Micro Devices | AMD | - | - | - | 103 Kb |
| 12. | AS27C256-70ECA | 256K UVEPROM UV Erasable Programmable Read-Only Memory | Austin Semiconductor | AUSTIN | - | - | - | 294 Kb |
| 13. | AS27C256-70ECAI | 256K UVEPROM UV Erasable Programmable Read-Only Memory | Austin Semiconductor | AUSTIN | - | - | - | 294 Kb |
| 14. | AS27C256-70ECAM | 256K UVEPROM UV Erasable Programmable Read-Only Memory | Austin Semiconductor | AUSTIN | - | - | - | 294 Kb |
| 15. | AS27C256-70ECAXT | 256K UVEPROM UV Erasable Programmable Read-Only Memory | Austin Semiconductor | AUSTIN | - | - | - | 294 Kb |
| 16. | AM27C256-70EI | 256 Kilobit (32,768 x 8-Bit) CMOS EPROM | Advanced Micro Devices | AMD | - | - | - | 103 Kb |
| 17. | AM27C256-70JC | 256 Kilobit (32 K x 8-Bit) CMOS EPRO | Advanced Micro Devices | AMD | - | - | - | 94 Kb |
| 18. | AM27C256-70JC | 256 Kilobit (32,768 x 8-Bit) CMOS EPROM | Advanced Micro Devices | AMD | - | - | - | 103 Kb |
| 19. | CY27C256-70JC | 32K x 8-Bit CMOS EPROM | Cypress Semiconductor | CYPRESS | - | - | - | 271 Kb |
| 20. | AS27C256-70JI | 256K UVEPROM UV Erasable Programmable Read-Only Memory | Austin Semiconductor | AUSTIN | - | - | - | 294 Kb |
| 21. | AM27C256-70JI | 256 Kilobit (32,768 x 8-Bit) CMOS EPROM | Advanced Micro Devices | AMD | - | - | - | 103 Kb |
