PDF SI2439 Data sheet ( Hoja de datos )

Número de pieza	SI2439
Descripción	V.92 AND V.34 ISOMODEM
Fabricantes	Silicon Laboratories
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No Preview Available ! Si2494/39 V. 9 2 AND V. 3 4 I S O MODEM® WITH G LOBAL D A A 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 Applications  Point-of-sale terminals  Security  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  Medical  Remote monitoring 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. System Block Diagram Host CPU Host Interface  UART  SPI  Parallel Si2494 System Side Si3018 Line Side Capacitive Isolation Barrier Global DAA BOM Telco Tip Ring Ordering Information This data sheet is valid only for those chipset combinations listed on page 59. Pin Assignments GPIO1 FSYNC CLKOUT N/C VDD GND VREG SDI SDO EESDI EESDO EECS 1 38 37 36 35 34 33 32 31 2 30 3 29 4 Si2494/39 28 5 27 6 5 x 7 mm 26 7 QFN 25 8 24 9 23 10 22 11 21 12 20 13 14 15 16 17 18 19 GPIO25, D3 GPIO24, D4 ESC, D5 DCD, D6 N/C VDD GND RTS, SS, D7 TXD, MOSI, WR RXD, MISO, RD CTS, SCLK, CS GPIO11, A0 Si3018 QE 1 DCT 2 RX 3 IB 4 C1B 5 C2B 6 VREG 7 RNG1 8 16 DCT2 15 IGND 14 DCT3 13 QB 12 QE2 11 SC 10 VREG2 9 RNG2 Rev. 1.0 7/11 Copyright © 2011 by Silicon Laboratories Si2494/39 1 page Si2494/39 1. Electrical Specifications Table 1. Recommended Operating Conditions Parameter1 Symbol Test Condition Min2 Typ Max2 Unit Ambient Temperature Si2494/39 Supply Voltage, Digital3 TA VD F-grade G-grade 0 25 –40 25 70 85 °C 3.0 3.3 3.6 V Notes: 1. The Si2494/39 specifications are guaranteed when the typical application circuit (including component tolerance) and any Si2494/39 and any Si3018 are used. See "2. Typical Application Schematic" on page 12. 2. All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions. Typical values apply at nominal supply voltages and an operating temperature of 25 °C unless otherwise stated. 3. The digital supply, VD, operates from 3.0 to 3.6 V. Figure 1. Test Circuit for Loop Characteristics Table 2. DC Characteristics, VD = 3.0 to 3.6 V (VD = 3.0 to 3.6 V, TA = 0 to 70 °C for F-grade, TA = –40 to 85 °C for G-grade) Parameter Symbol Test Condition Min Typ Max High Level Input Voltage Low Level Input Voltage VIH VIL 2.0 — — — — 0.8 High Level Output Voltage VOH IO = –2 mA 2.4 — — Low Level Output Voltage VOL IO = 2 mA — — 0.35 Input Leakage Current Pullup Resistance Pins Total Supply Current* IL RPU ID –10 — 10 50 125 200 — 17 35 Total Supply Current, Wake-On-Ring* Total Supply Current, Powerdown* ID ID PDN = 1 — 4.4 — — 80 — *Note: All inputs at 0 or VD. All inputs held static except clock and all outputs unloaded (Static IOUT = 0 mA). Unit V V V V µA k mA mA µA Rev. 1.0 5 5 Page CS A0 WR D[7:0] CS tCSS tCSH tAS tAH ADDRESS = 0 or 1 tW L tW DSU tDH VALID DATA tW C Figure 4. Parallel Interface Write Timing Si2494/39 VALID DATA A0 WR RD D[7:0] ADDRESS = 0 or 1 tWRC tWDSU tDH VALID DATA tRLDD Figure 5. Parallel Interface Write Followed by Read Timing VALID DATA Rev. 1.0 11 11 Page

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