SI2417-C-FTR

Overview

The SI2417-C-FTR is a system-side ISOmodem chipset component manufactured by Skyworks Solutions Inc. It supports fax modem formats with connect rates up to 33,600 bps over the Public Switched Telephone Network (PSTN). The device operates on a digital supply voltage ranging from 3.0 V to 3.6 V and consumes a typical total supply current of 26 mA at nominal conditions. It features an integrated Direct Access Arrangement (DAA) providing over 6000 V capacitive isolation. The component utilizes a 4.9152 MHz default clock input or accepts a 27 MHz master clock via the XTALI pin. It supports asynchronous UART serial communication up to 307.2 kbps or an 8-bit parallel interface.

Feature Summary

• Integrated silicon Direct Access Arrangement (DAA) eliminates the need for external isolation transformers, relays, opto-isolators, and hybrid circuits.
• Supports ITU-T T.31 compliant Class 1 commands for G3 and Super G3 fax communication protocols.
• Includes global caller ID decoding capabilities supporting US Bellcore, European ETSI, UK, Japanese, and DTMF protocols.
• Provides data/fax/voice discrimination via tone detection and automatic rate negotiation.

Applications

• Fax machines
• Fax telephones
• Multifunctional printers
• Fax servers

Procurement Notes

Verify the specific ordering suffix 'C-FTR' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Confirm that the intended application environment falls within the specified F-Grade temperature range of 0°C to +70°C. Ensure the host system provides the required 3.0 V to 3.6 V digital supply voltage. Check for any regional compliance requirements regarding the integrated DAA line interface.

Selection Notes

Select this component for designs requiring a compact, globally-compliant fax modem solution without external DSPs or codecs. The Si2417 variant supports speeds up to 33.6 kbps but lacks V.8 call establishment support found in the Si2435 counterpart. Verify interface compatibility with the host microcontroller, as the device defaults to serial UART mode upon reset unless configured for parallel operation. Consider the minimal external component count when evaluating board space constraints.

Part Context

The SI2417 is part of the Silicon Laboratories ISOmodem family, now managed by Skyworks Solutions Inc. It functions as the system-side controller paired with the Si3018 DAA chip. This two-chip solution replaces traditional discrete modem architectures. The product is designed for high integration, reducing bill-of-materials complexity while maintaining full PSTN compliance and standard AT command set support.

Replacement Considerations

The Si2435 is a compatible alternative within the same chipset family offering V.8 call establishment support. Other members of the ISOmodem family include the SI2457, SI2434, SI2415, and SI2404. Verify functional equivalence regarding supported fax speeds and protocol implementations before substitution.