| Part name | Description | Manufacturer | Package | Pins | Temp. Range | PDF datasheet |
| M27C4001-90XC1X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C4001-90XC1X datasheet (113K) |
| M27C4001-90XC6TR | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-90XC6TR datasheet (113K) |
| M27C4001-90XC6X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-90XC6X datasheet (113K) |
| M27C4001-90XF1X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | FDIP | 32 | 0°C | 70°C | M27C4001-90XF1X datasheet (113K) |
| M27C4001-90XF6X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | FDIP | 32 | -40°C | 85°C | M27C4001-90XF6X datasheet (113K) |
| M27C4001-90XL1TR | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | LCCC | 32 | 0°C | 70°C | M27C4001-90XL1TR datasheet (113K) |
| M27C4001-90XL1X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | LCCC | 32 | 0°C | 70°C | M27C4001-90XL1X datasheet (113K) |
| M27C4001-90XL6TR | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | LCCC | 32 | -40°C | 85°C | M27C4001-90XL6TR datasheet (113K) |
| M27C4001-90XL6X | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | LCCC | 32 | -40°C | 85°C | M27C4001-90XL6X datasheet (113K) |
| M27C4001-90XN1TR | 4 Mbit (512Kb x 8) EPROM, 90ns | SGS-Thomson Microelectronics | TSOP | 32 | 0°C | 70°C | M27C4001-90XN1TR datasheet (113K) |
