Silicon Laboratory Inc. Si2494

Description

The Si2494/39 ISOmodem is a full-featured ITU V.92/V.34-compliant modem that provides connect rates of up to 56 kbps, full-duplex, over the public switched telephone network (PSTN). Offered as a chipset with the Si2494/39 system-side device and the Si3018 line-side device, the ISOModem utilizes Silicon Laboratories’ patented direct access arrangment (DAA) technology to provide a programmable telephone line interface with an unparalleled level of integration. This compact solution eliminates the need for a separate DSP, modem controller, codec, transformer, relay, opto-isolators, clocking crystal, and 2-4 wire hybrid. The addition of the Si3000 voice codec supports a voice handset and/or full-duplex speakerphone. Voice pass-through with optional compression supports tapeless answering machine, music-on-hold, voice menus, etc. The Si2494/39 is ideal for embedded modem applications due to its flexibility, small footprint, and minimal external component count.

Features

• Data modem formats

  -ITU-T, Bell

  -300 bps up to 56 kbps

  -V.21,V.22, V.29 Fast Connect

  -V.44, V.42, V.42bis, MNP2-5

  -Automatic rate negotiation

  -V.92 PCM upstream

  -V.92 Quick connect

  -V.92 Modem on hold

• Type I and II caller ID decode

  -No external ROM or RAM required

  -UART, SPI, or parallel interface

  -Flexible clock options

  -Low-cost 32.768 kHz oscillator

  -4.915 MHz oscillator

  -27 MHz clock input

• Integrated DAA

  -Over 6000 V capacitive isolation

  -Parallel phone detect

  -Globally-compliant line interface

  -Overcurrent detection

• AT command set support
• SMS / MMS support
• Firmware upgradeable
• EEPROM interface
• Commercial or industrial
• temperature range
• DTMF detection/generation

• Si3000 Voice Codec Interface

  -Hardware support for mic,speaker, and/or handset

• Programmable voice filters,limiters, and sidetone
• Supports TBR-38, TIA/EIA-4790 and other voice standards
• Voice pass through with compression
• Supports telephone answering machine, music on hold, voice menus, etc
• Full-duplex speakerphone support
• Line echo cancellation
• Acoustic echo cancellation

Typical applications

• Security
• Point-of-sale terminals
• Remote monitoring
• Medical

More information

• Datasheet
• IC product information