| Part name | Description | Manufacturer | Package | Pins | Temp. Range | PDF datasheet |
| M27C4001-45XN1TR | 4 Mbit (512Kb x 8) EPROM, 45ns | SGS-Thomson Microelectronics | TSOP | 32 | 0°C | 70°C | M27C4001-45XN1TR datasheet (113K) |
| M27C4001-45XN1X | 4 Mbit (512Kb x 8) EPROM, 45ns | SGS-Thomson Microelectronics | TSOP | 32 | 0°C | 70°C | M27C4001-45XN1X datasheet (113K) |
| M27C4001-45XN6X | 4 Mbit (512Kb x 8) EPROM, 45ns | SGS-Thomson Microelectronics | TSOP | 32 | -40°C | 85°C | M27C4001-45XN6X datasheet (113K) |
| M27C4001-45XN6X | 4 Mbit (512Kb x 8) EPROM, 45ns | SGS-Thomson Microelectronics | TSOP | 32 | -40°C | 85°C | M27C4001-45XN6X datasheet (113K) |
| M27C4001-55B6X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | PDIP | 32 | -40°C | 85°C | M27C4001-55B6X datasheet (113K) |
| M27C4001-55C1TR | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C4001-55C1TR datasheet (113K) |
| M27C4001-55C1X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C4001-55C1X datasheet (113K) |
| M27C4001-55C6TR | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-55C6TR datasheet (113K) |
| M27C4001-55C6X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C4001-55C6X datasheet (113K) |
| M27C4001-55F6X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | FDIP | 32 | -40°C | 85°C | M27C4001-55F6X datasheet (113K) |
