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| Part Number | FM1608B-SG | FM1808B-SG | FM1608B-PG | 
|---|---|---|---|
| Manufacturer | Infineon Technologies | Infineon Technologies | Cypress Semiconductor Corp | 
| Product Status | Obsolete | Active | Obsolete | 
| Memory Type | Non-Volatile | Non-Volatile | Non-Volatile | 
| Memory Format | FRAM | FRAM | FRAM | 
| Technology | FRAM (Ferroelectric RAM) | FRAM (Ferroelectric RAM) | FRAM (Ferroelectric RAM) | 
| Memory Size | 64Kb (8K x 8) | 256Kb (32K x 8) | 64Kb (8K x 8) | 
| Memory Interface | Parallel | Parallel | Parallel | 
| Clock Frequency | - | - | - | 
| Write Cycle Time - Word, Page | 130ns | 130ns | 130ns | 
| Access Time | - | - | - | 
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | Through Hole | 
| Package / Case | 28-SOIC (0.295", 7.50mm Width) | 28-SOIC (0.295", 7.50mm Width) | 28-DIP (0.600", 15.24mm) | 
| Supplier Device Package | 28-SOIC | 28-SOIC | 28-DIP |