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SI2401 Datasheet(PDF) 11 Page - Silicon Laboratories |
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SI2401 Datasheet(HTML) 11 Page - Silicon Laboratories |
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11 / 72 page  Si2401/Si3008 Rev. 1.1 11 4. Functional Description The Si2401 ISOmodem utilizing the Si3008 line-side device is a complete embedded modem chipset with integrated direct access arrangement (DAA). Available in two small packages, this solution includes a DSP data pump, modem controller, on-chip RAM and ROM, codec, DAA, analog output, and 27 MHz clock input. The modem accepts simple modem AT commands and provides connect rates up to 2400 bps full-duplex over the Public Switched Telephone Network (PSTN) with V.42 hardware support through HDLC framing. To minimize handshake times, the Si2401 can implement a V.22-based fast connect. The modem also supports the V.23 reversing protocol and standard alarm formats including SIA. This device is ideal for embedded modem applications due to its flexibility, small footprint, and minimal external component count. The Si2401 solution integrates a silicon DAA using Silicon Laboratories’ proprietary fourth-generation DAA technology. This highly- integrated DAA can be programmed using the Si3008 to meet international requirements and is compliant with FCC, JATE, and other country-specific PTT specifications as shown in Table 7. The Si2401 is designed for rapid assimilation into existing modem applications. The device interfaces directly through a UART to a microcontroller. The Si2401URT-EVB evaluation board connects directly to a standard RS-232 or USB interface. This allows for evaluation of the modem immediately upon powerup via HyperTerminal or any standard terminal software. In addition, the Si2401 has been designed to meet the most stringent worldwide requirements for out-of-band energy, billing-tone immunity, high-voltage surges, and safety requirements. Table 7. Country-Specific PTT Specifications Country Argentina Kyrgyzstan Armenia Macao Bahamas Mexico Bangladesh Moldova Belarus New Zealand2 Bermuda Paraguay Brunei Peru Canada Puerto Rico Caribbean Russia Chile Saudi Arabia China Singapore Colombia South Korea3 Costa Rica Sri Lanka Dominican Republic Taiwan Ecuador Thailand El Salvador Tunisia Georgia UAE Guam Ukraine Hong Kong Uruguay India Uzbekistan Indonesia USA Japan1 Venezuela Kazakhstan Vietnam Kuwait Yemen Notes: 1. DCR exceeds 300 Ω; disclaimer required in product documentation. 2. 600 Ω ac termination used; disclaimer required in product documentation. 3. Additional components required to pass ringer impedance specifications. |
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