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| PartNumber | SI2457-C-FT | SI2457-C-FS | SI2457-C-FSR |
| Description | Network Controller & Processor ICs 56 kbps V.90 data ISOmodem system-side | Network Controller & Processor ICs 56 kbps V.90 data ISOmodem system-side | Network Controller & Processor ICs 56 kbps V.90 data ISOmodem system-side |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Category | Network Controller & Processor ICs | Network Controller & Processor ICs | Network Controller & Processor ICs |
| RoHS | Y | Y | Y |
| Series | SI2457 | SI2457 | SI2457 |
| Product | ISOModems | ISOModems | ISOModems |
| Data Rate | 56 kb/s | 56 kb/s | 56 kb/s |
| Frequency | 4.92 MHz | 4.92 MHz | 4.92 MHz |
| Interface Type | Parallel, SPI, UART | Parallel, SPI, UART | Parallel, SPI, UART |
| Operating Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| Operating Supply Current | 17 mA | 17 mA | 17 mA |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TSSOP-24 | SOIC-16 | SOIC-16 |
| Packaging | Tube | Tube | Reel |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | Network Controller & Processor ICs | Network Controller & Processor ICs | Network Controller & Processor ICs |
| Factory Pack Quantity | 62 | 48 | 2500 |
| Subcategory | Communication & Networking ICs | Communication & Networking ICs | Communication & Networking ICs |
| Supply Voltage Max | 3.6 V | 3.6 V | 3.6 V |
| Supply Voltage Min | 3 V | 3 V | 3 V |
| Tradename | ISOmodem | - | - |
| Unit Weight | 0.003906 oz | 0.006938 oz | 0.006679 oz |