| Part name | Description | Manufacturer | Package | Pins | Temp. Range | PDF datasheet |
| M27C4001-80XN6TR | 4 Mbit (512Kb x 8) EPROM, 80ns | SGS-Thomson Microelectronics | TSOP | 32 | -40°C | 85°C | M27C4001-80XN6TR datasheet (113K) |
| M27C4001-80XN6X | 4 Mbit (512Kb x 8) EPROM, 80ns | SGS-Thomson Microelectronics | TSOP | 32 | -40°C | 85°C | M27C4001-80XN6X datasheet (113K) |
| M27C4001-90B1X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PDIP | 32 | 0°C | 70°C | M27C4001-90B1X datasheet (113K) |
| M27C4001-90B6X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PDIP | 32 | -40°C | 85°C | M27C4001-90B6X datasheet (113K) |
| M27C4001-90C1TR | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C4001-90C1TR datasheet (113K) |
| M27C4001-90C1X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C4001-90C1X datasheet (113K) |
| M27C4001-90C6TR | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-90C6TR datasheet (113K) |
| M27C4001-90C6X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-90C6X datasheet (113K) |
| M27C4001-90F1X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | FDIP | 32 | 0°C | 70°C | M27C4001-90F1X datasheet (113K) |
| M27C4001-90F6X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | FDIP | 32 | -40°C | 85°C | M27C4001-90F6X datasheet (113K) |
