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| Part Number | 4720BDM | 4720BDC | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | National Semiconductor | 
| Product Status | Active | Active | 
| Memory Type | Volatile | - | 
| Memory Format | RAM | - | 
| Technology | RAM | - | 
| Memory Size | 256b (256 x 1) | - | 
| Memory Interface | Parallel | - | 
| Clock Frequency | - | - | 
| Write Cycle Time - Word, Page | - | - | 
| Access Time | - | - | 
| Voltage - Supply | 4.5V ~ 12.5V | - | 
| Operating Temperature | -55°C ~ 125°C (TA) | - | 
| Mounting Type | Through Hole | - | 
| Package / Case | 16-CDIP | - | 
| Supplier Device Package | 16-CDIP | - |