| Part name | Description | Manufacturer | Package | Pins | Temp. Range | PDF datasheet |
| M27C4001-55L1TR | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | LCCC | 32 | 0°C | 70°C | M27C4001-55L1TR datasheet (113K) |
| M27C4001-55L1X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | LCCC | 32 | 0°C | 70°C | M27C4001-55L1X datasheet (113K) |
| M27C4001-55L6TR | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | LCCC | 32 | -40°C | 85°C | M27C4001-55L6TR datasheet (113K) |
| M27C4001-55L6X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | LCCC | 32 | -40°C | 85°C | M27C4001-55L6X datasheet (113K) |
| M27C4001-55N1TR | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | TSOP | 32 | 0°C | 70°C | M27C4001-55N1TR datasheet (113K) |
| M27C4001-55N1X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | TSOP | 32 | 0°C | 70°C | M27C4001-55N1X datasheet (113K) |
| M27C4001-55N6TR | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | TSOP | 32 | -40°C | 85°C | M27C4001-55N6TR datasheet (113K) |
| M27C4001-55N6X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | TSOP | 32 | -40°C | 85°C | M27C4001-55N6X datasheet (113K) |
| M27C4001-55XB1X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | PDIP | 32 | 0°C | 70°C | M27C4001-55XB1X datasheet (113K) |
| M27C4001-55XB6X | 4 Mbit (512Kb x 8) EPROM, 55ns | SGS-Thomson Microelectronics | PDIP | 32 | -40°C | 85°C | M27C4001-55XB6X datasheet (113K) |
