Silicon Laboratories Inc. launched the next generation of its widely used Si24xx ISOmodem family, offering advanced voice features, lower power, reduced BOM costs and flexible interface options for a wide range of data modem applications. The innovative Si24xx data modem ICs address the need for voice and machine-to-machine (M2M) communications for security and home automation systems, smart utility meters, set-top boxes, point-of-sale (POS) terminals and many other electronics systems that connect to the public switched telephone network (PSTN).

Data Modem with Voice and M2M Communication for Security Systems and Home AutomationThe Si24xx ISOmodem family’s voice feature set is more comprehensive and offers better performance and audio fidelity than legacy data modem solutions. When combined with Silicon Labs’ popular Si3000 voice codec, the Si24xx data modems support handset, speakerphone (full or half-duplex), voice menu and answering machine implementations.

Developers can easily add telephony and voice functions to any embedded system, without the need for the dedicated voice processing ICs or host-based DSP software required by legacy approaches. The voice-capable Si24xx ICs are ideal for any system with telephony functions ranging from POS terminals and security systems to video phones and medical monitoring equipment.

In addition to offering a complete suite of ITU-T “V-dot” data communications, compression and error correction protocols, the ISOmodem family supports specialized protocols used in security and POS applications. Standard DTMF generation and detection and user-programmable tone detection and generation give the Si24xx family the flexibility to support non-standard custom protocols through host software.

The Si24xx data modem devices also offer the option of using a serial peripheral interface (SPI) in addition to UART and parallel interfaces, enabling resource sharing among multiple peripherals. The Si24xx data modems leverage the patented architecture of the world’s most widely adopted silicon data access arrangement (DAA) solution. Silicon Labs’ global silicon DAAs deliver unmatched surge immunity without additional BOM cost.