| X25640P | 64K (8K x 8bit) Advanced SPI serial E2PROM with block lock protection in 8-pin DIP8P package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| X25640PI | 64K (8K x 8bit) Advanced SPI serial E2PROM with block lock protection in 8-pin DIP8P package. Operational temperature range from -40°C to 85°C. | Datasheet*) |
| X25640PM | 64K (8K x 8bit) Advanced SPI serial E2PROM with block lock protection in 8-pin DIP8P package. Operational temperature range from -55°C to 125°C. | Datasheet*) |
| X25640S | 64K (8K x 8bit) Advanced SPI serial E2PROM with block lock protection in 14-pin SOIC14 package. Operational temperature range from 0°C to 70°C. | Datasheet*) |
| X25640SI | 64K (8K x 8bit) Advanced SPI serial E2PROM with block lock protection in 14-pin SOIC14 package. Operational temperature range from -40°C to 85°C. | Datasheet*) |
| X25640SM | 64K (8K x 8bit) Advanced SPI serial E2PROM with block lock protection in 14-pin SOIC14 package. Operational temperature range from -55°C to 125°C. | Datasheet*) |
| X25640 | Advanced SPI Serial E2PROM With Block LockTM Protection | Datasheet*) |