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| Part Number | CY7C421-20VXC | CY7C421-20VXCT | CY7C421-20JXC | CY7C421-20VC |
|---|---|---|---|---|
| Manufacturer | Infineon Technologies | Infineon Technologies | Flip Electronics | Rochester Electronics, LLC |
| Product Status | Obsolete | Obsolete | Obsolete | Active |
| Memory Size | 4.5K (512 x 9) | 4.5K (512 x 9) | 4.5K (512 x 9) | 512 x 9 |
| Function | Asynchronous | Asynchronous | Asynchronous | Asynchronous |
| Data Rate | 50MHz | 50MHz | 50MHz | 33.3MHz |
| Access Time | 20ns | 20ns | 20ns | 20ns |
| Voltage - Supply | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V | 4.5 V ~ 5.5 V |
| Current - Supply (Max) | 55mA | 55mA | 55mA | 55mA |
| Bus Directional | Uni-Directional | Uni-Directional | Uni-Directional | Uni-Directional |
| Expansion Type | Depth, Width | Depth, Width | Depth, Width | Depth, Width |
| Programmable Flags Support | No | No | No | No |
| Retransmit Capability | Yes | Yes | Yes | Yes |
| FWFT Support | No | No | No | No |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 28-BSOJ (0.300", 7.62mm Width) | 28-BSOJ (0.300", 7.62mm Width) | 32-LCC (J-Lead) | 28-BSOJ (0.300", 7.62mm Width) |
| Supplier Device Package | 28-SOJ | 28-SOJ | 32-PLCC (11.43x13.97) | 28-SOJ |
