| Part name | Description | Manufacturer | Package | Pins | Temp. Range | PDF datasheet |
| M27C4001-12XB1X | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | PDIP | 32 | 0°C | 70°C | M27C4001-12XB1X datasheet (113K) |
| M27C4001-12XB6X | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | PDIP | 32 | -40°C | 85°C | M27C4001-12XB6X datasheet (113K) |
| M27C4001-12XC1TR | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C4001-12XC1TR datasheet (113K) |
| M27C4001-12XC1X | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C4001-12XC1X datasheet (113K) |
| M27C4001-12XC6TR | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-12XC6TR datasheet (113K) |
| M27C4001-12XC6X | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-12XC6X datasheet (113K) |
| M27C4001-12XF1X | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | FDIP | 32 | 0°C | 70°C | M27C4001-12XF1X datasheet (113K) |
| M27C4001-12XL1TR | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | LCCC | 32 | 0°C | 70°C | M27C4001-12XL1TR datasheet (113K) |
| M27C4001-12XL1X | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | LCCC | 32 | 0°C | 70°C | M27C4001-12XL1X datasheet (113K) |
| M27C4001-12XL6TR | 4 Mbit (512Kb x 8) EPROM, 120ns | SGS-Thomson Microelectronics | LCCC | 32 | -40°C | 85°C | M27C4001-12XL6TR datasheet (113K) |
