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SI32261-C-GM1R / The SI32261-C-GM1R is a high-performance <strong>dual-channel ProSLIC subscriber line interface circuit (SLIC)</strong> originally developed by <strong>Silicon Laboratories (Silicon Labs)</strong> and offered under <strong>Skyworks Solutions</strong>. Designed for telecommunications and voice-over-IP applications, this advanced integrated circuit combines <strong>two independent wideband-capable FXS channels with integrated voice CODEC functionality</strong>, providing an efficient interface between conventional analog telephone equipment and digital communication networks.<br><br>The device integrates essential <strong>BORSCHT subscriber line functions</strong>, including battery feed, overvoltage protection support, ringing, supervision, coding, hybrid conversion, and testing capabilities. Its dual-channel architecture enables simultaneous operation of two analog subscriber lines, reducing external component requirements and simplifying the design of multiport telecommunications systems. The integrated architecture supports reliable analog telephone connectivity in both short-loop and long-loop applications.<br><br>The SI32261-C-GM1R features <strong>wideband voice support with integrated digital signal processing</strong> and provides flexible communication through <strong>PCM, SPI, and GCI/IOM-2 compatible interfaces</strong>. It supports <strong>A-law and μ-law companding, linear PCM operation, and DTMF generation and decoding</strong>, allowing integration with VoIP processors, embedded communication controllers, and digital telephony platforms. Programmable operating parameters enable adaptation to different regional telephone network requirements.<br><br>Operating from a nominal <strong>3.3V supply with a specified operating voltage range of 3.13V to 3.47V</strong>, the device is optimized for integration into modern digital communication systems. The SI32261 variant supports a <strong>maximum negative battery supply voltage of -140V</strong>, enabling high-voltage subscriber line operation and programmable ringing functions when combined with an appropriately designed external power supply and line interface circuitry.<br><br>The integrated ProSLIC architecture incorporates <strong>DC-DC converter control with support for tracking and shared supply configurations</strong>, providing flexibility in power management and helping reduce overall system power consumption. Advanced features include <strong>programmable ringing frequency, amplitude, cadence, and waveform, adaptive ringing, smooth polarity reversal, and configurable DC loop feed current from 10mA to 45mA</strong>. These functions allow engineers to optimize telephone line behavior for different operating conditions and subscriber equipment.<br><br>For improved system monitoring and maintenance, the SI32261-C-GM1R supports <strong>GR-909 subscriber loop diagnostics, audio loopback testing, integrated test load functionality, and programmable line supervision thresholds</strong>. These diagnostic capabilities help identify line faults, monitor subscriber connections, and simplify troubleshooting in complex telecommunications installations. Software configuration through the ProSLIC API further reduces development complexity and enables flexible system customization.<br><br>The device is supplied in a compact <strong>60-pin LGA surface-mount package measuring 8 × 8 mm</strong>, making it suitable for high-density PCB layouts and space-constrained telecommunications equipment. The <strong>GM1 industrial temperature grade supports operation from -40°C to +85°C</strong>, providing a wider operating temperature range than commercial-grade alternatives. The <strong>R suffix identifies Tape & Reel packaging</strong>, supporting automated pick-and-place assembly and high-volume electronic manufacturing.<br><br>The <strong>SI32261-C-GM1R</strong> is designed for applications including <strong>VoIP gateways, analog telephone adapters (ATA), IP-PBX systems, xDSL integrated access devices, optical network terminals (ONT), residential gateways, cable telephony equipment, wireless fixed terminals, and multiport FXS communication systems</strong>. Its combination of dual-channel analog subscriber line functionality, wideband voice capability, integrated CODEC processing, industrial temperature operation, and advanced power management makes it a versatile solution for professional telecommunications and embedded voice communication hardware.
SI32261-C-GM1R

Description: The SI32261-C-GM1R is a high-performance dual-channel ProSLIC subscriber line inte ...
Package: T&R | MOQ: 2500 | MPQ: 2500

SI32261-C-FM1 / The SI32261-C-FM1 is a high-performance <strong>dual-channel ProSLIC subscriber line interface circuit (SLIC)</strong> originally developed by <strong>Silicon Laboratories (Silicon Labs)</strong> and now offered under <strong>Skyworks Solutions</strong>. Designed for modern telecommunications equipment, VoIP gateways, and analog telephone interfaces, this integrated circuit combines <strong>two wideband-capable FXS channels with integrated voice CODEC functionality</strong>, providing an efficient solution for connecting traditional analog telephones to digital communication networks.<br><br>The device integrates essential subscriber line functions, including <strong>analog voice conversion, line feeding, ringing control, and subscriber line supervision</strong>, within a single semiconductor package. Its dual-channel architecture allows two independent analog telephone connections to be supported, reducing component count, simplifying PCB design, and improving overall system integration in multiport telecommunications equipment.<br><br>The SI32261-C-FM1 supports <strong>wideband voice applications</strong> and provides digital communication interfaces including <strong>PCM, SPI, and GCI</strong>, enabling integration with communication processors, embedded controllers, and VoIP system-on-chip platforms. Its programmable operating characteristics allow designers to configure telephone line parameters and adapt the device to different regional telecommunication requirements.<br><br>Operating from a nominal <strong>3.3V supply voltage with a specified range of 3.13V to 3.47V</strong>, the device is designed for efficient digital system integration. The SI32261 variant supports a <strong>maximum battery supply magnitude of 140V (VBAT down to -140V)</strong>, enabling high-voltage subscriber line operation and ringing applications when used with an appropriately designed external power supply and line interface circuitry.<br><br>The integrated ProSLIC architecture supports <strong>tracking or shared DC-DC converter configurations</strong>, offering flexibility in power supply design and helping optimize power consumption in telecommunications systems. Advanced line monitoring and programmable control features contribute to reliable telephone operation, while the integrated CODEC architecture reduces the need for additional analog signal-processing components.<br><br>The SI32261-C-FM1 is supplied in a compact <strong>60-pin LGA surface-mount package measuring 8 × 8 mm</strong>, making it suitable for densely populated communication circuit boards. It is specified for a <strong>commercial operating temperature range of 0°C to +70°C</strong> and is intended for equipment operating within controlled environmental conditions.<br><br>The <strong>SI32261-C-FM1</strong> is suitable for applications including <strong>VoIP gateways, analog telephone adapters (ATA), IP-PBX systems, residential gateways, integrated access devices, telecommunications line cards, and multiport FXS communication equipment</strong>. Its combination of dual-channel subscriber line functionality, wideband voice capability, flexible digital interfaces, and integrated analog circuitry makes it a practical solution for modern voice communication hardware.
SI32261-C-FM1

Description: The SI32261-C-FM1 is a high-performance dual-channel ProSLIC subscriber line inter ...
Package: TRAY | MOQ: 348 | MPQ: 348













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