| Part name | Description | Manufacturer | Package | Pins | Temp. Range | PDF datasheet |
| M27C256B-70XC1 | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | PLCC | 32 | 0°C | 70°C | M27C256B-70XC1 datasheet (107K) |
| M27C256B-70XC3 | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 125°C | M27C256B-70XC3 datasheet (107K) |
| M27C256B-70XC3TR | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 125°C | M27C256B-70XC3TR datasheet (107K) |
| M27C256B-70XC6 | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C256B-70XC6 datasheet (107K) |
| M27C256B-70XC6TR | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | PLCC | 32 | -40°C | 85°C | M27C256B-70XC6TR datasheet (107K) |
| M27C256B-70XF1 | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | FDIP | 28 | 0°C | 70°C | M27C256B-70XF1 datasheet (107K) |
| M27C256B-70XF3 | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | FDIP | 28 | -40°C | 125°C | M27C256B-70XF3 datasheet (107K) |
| M27C256B-70XF6 | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | FDIP | 28 | -40°C | 85°C | M27C256B-70XF6 datasheet (107K) |
| M27C256B-70XN1 | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | TSOP | 28 | 0°C | 70°C | M27C256B-70XN1 datasheet (107K) |
| M27C256B-70XN1TR | 256 Kbit (32Kb x 8) EPROM, 5V, 70ns | SGS-Thomson Microelectronics | TSOP | 28 | 0°C | 70°C | M27C256B-70XN1TR datasheet (107K) |
