GPIO16, D2 RI GPIO17, D1 C1A GPIO18, D0 C2A RESET INT AOUT CLKIN/XTALI XTALO AOUTb N/C EECLK Si2494-39 V.92 AND V.34 ISOMODEM WITH GLOBAL DAA Features Data modem formats EEPROM interface ITU-T, Bell Commercial or industrial temperature range 300 bps up to 56 kbps DTMF detection/generation V.21,V.22, V.29 Fast Connect Si3000 Voice Codec Interface V.44, V.42, V.42bis, MNP2-5 Hardware support for mic, Automatic rate negotiation speaker, and/or handset V.92 PCM upstream Programmable voice filters, V.92 Quick connect limiters, and sidetone V.92 Modem on hold Supports TBR-38, TIA/EIA- Type I and II caller ID decode 4790 and other voice No external ROM or RAM required UART, SPI, or parallel interface standards Flexible clock options Voice pass through with Ordering Information Low-cost 32.768 kHz oscillator compression 4.915 MHz oscillator Supports telephone This data sheet is valid only for 27 MHz clock input answering machine, music those chipset combinations listed Integrated DAA on hold, voice menus, etc on page 59. Over 6000 V capacitive isolation Full-duplex speakerphone Parallel phone detect support Globally-compliant line interface Line echo cancellation Overcurrent detection Acoustic echo cancellation Pin Assignments AT command set support SMS / MMS support Firmware upgradeable Applications Point-of-sale terminals Medical 38 37 36 35 34 33 32 GPIO1 1 GPIO25, D3 31 Security Remote monitoring 2 30 GPIO24, D4 FSYNC CLKOUT 3 29 ESC, D5 Description N/C 4 28 DCD, D6 Si2494/39 VDD 5 27 N/C GND 6 5 x 7 mm 26 VDD The Si2494/39 ISOmodem is a full-featured ITU V.92/V.34-compliant modem that QFN VREG 7 25 GND provides connect rates of up to 56 kbps, full-duplex, over the public switched SDI 8 24 RTS, SS, D7 telephone network (PSTN). Offered as a chipset with the Si2494/39 system-side SDO 9 23 TXD, MOSI, WR device and the Si3018 line-side device, the ISOModem utilizes Skyworks EESDI 10 22 RXD, MISO, RD Solutions patented direct access arrangment (DAA) technology to provide a EESDO 11 21 CTS, SCLK, CS programmable telephone line interface with an unparalleled level of integration. EECS 20 12 GPIO11, A0 13 14 15 16 17 18 19 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 Si3018 external component count. QE 16 DCT2 1 System Block Diagram DCT 2 15 IGND RX 3 14 DCT3 IB 4 13 QB C1B 5 12 QE2 Si2494 Si3018 Global Tip Host Host Interface Telco System Line C2B DAA 6 11 SC CPU Ring Side Side BOM VREG 7 10 VREG2 9 RNG1 8 RNG2 UART SPI Capacitive Parallel Isolation Barrier Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 8, 2021Si2494-39 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 8, 2021