Interface ICs
Subcategories
Products (3,400+)
SI2435-E-FT - 33.6 kbps V.34 Modem | Skyworks | Fax Systems
Skyworks Solutions SI2435-E-FT is a V.34 system-side fax modem IC operating at up to 33.6 kbps and packaged in a 24-pin TSSOP. The device belongs to the Silicon Laboratories ISOmodem family and integrates a globally programmable telephone-line interface using a third-generation direct access arrangement, or DAA. It is intended for compact fax and data-communication systems requiring an integrated modem function rather than a collection of separate analog and digital interface circuits. An ISOmodem is an integrated modem solution that combines digital signal processing with telephone-line interface functions. The DAA connects the modem to an analog telephone line while isolating and conditioning the signal path. Within the broader hierarchy, this component is a communication interface IC, a data modem, and ultimately a semiconductor designed for embedded communications equipment. The SI2435-E-FT supports V.34 operation at 33.6 kbps, providing the principal data-rate specification for this ordering code. Its 24-TSSOP surface-mount package supports compact PCB construction while retaining enough pins for power, control, data, and line-interface connections. The component is identified as the system-side member of the SI2435 and SI2417 two-chip fax-modem chipset described by the manufacturer documentation. The Si2435 and Si2417 family combines modem processing with a programmable DAA to reduce the number of external components required around a telephone-line interface. This integration is valuable in embedded fax appliances, multifunction peripherals, telephone systems, and other equipment that must communicate over analog telephone lines. The exact power, voltage, timing, and environmental limits should be confirmed in the manufacturer datasheet before schematic release. A successful design must account for the analog telephone-network environment, including line protection, isolation, grounding, and signal coupling. Follow the reference connection and component-selection guidance in the SI2435/Si2417 datasheet rather than treating the modem IC as a standalone USB or UART peripheral. The device communicates according to a dedicated modem interface rather than a generic serial protocol. When comparing this part with another modem, verify the line standard, maximum bit rate, chip-set role, DAA architecture, package, pinout, and clock requirements. A device with the same nominal speed is not necessarily a drop-in replacement. Board changes may be required if its digital interface, analog support network, firmware expectations, or package differs. This product page consolidates the manufacturer specifications, package information, sourcing guidance, application guidance, and verified cross-reference status for the SI2435-E-FT. It also distinguishes confirmed technical facts from electrical details that still require consultation of the official datasheet, helping engineers qualify the device before committing a telephone-interface board to production.
SI2435-F-FT 33.6kbps V.34 Fax Modem | Skyworks
Skyworks Solutions Inc. SI2435-F-FT is a 33,600 bit/s V.34 fax modem IC with an integrated direct access arrangement, a built-in phase-locked loop, and DTMF detection, housed in a 24-pin TSSOP package. The Si2435 is the system-side device in the Si2435 and Si2417 two-chip ISOmodem fax-modem chipset, combining telephone-line interface functions with digital signal processing. An ISOmodem is an integrated modem system that provides a compact interface between digital equipment and an analog telephone line. Its direct access arrangement, or DAA, handles the physical line connection, while the companion Si2417 provides the supporting system-side functions. The Si2435 is specifically designed for high-performance Group 3 fax communication systems and can operate across the 14,400 to 33,600 bit/s speed range identified for the chipset. The SI2435-F-FT combines several communications functions in one package. Key features include a built-in phase-locked loop, DTMF detection, globally programmable telephone-line interfacing, and V.34 modem operation rated at 33,600 bit/s. Its 24-pin TSSOP package supports conventional surface-mount PCB assembly and is suitable for embedded fax, multifunction-printer, and office-equipment designs. The Si2435 architecture integrates a third-generation direct access arrangement with the modem signal-processing functions. This integration reduces the number of external telephone-interface components required by the host system. The phase-locked loop supports stable synchronization within the modem design, while DTMF detection provides call-control information commonly used by telephone and fax equipment. Typical uses include 33.6 kbit/s Group 3 fax machines, multifunction printers, fax servers, thermal-transfer fax products, and embedded communications modules. The two-chip Si2435 and Si2417 architecture is intended for designs that need telephone-line connectivity while preserving a compact implementation and avoiding a large collection of discrete analog-interface components. When designing around the SI2435-F-FT, use the manufacturer’s reference circuit, exposed-pad or thermal-layout guidance where applicable, and the complete Si2435/Si2417 datasheet to establish the DAA network and digital interface. Check the host processor voltage levels, line-side protection requirements, and country-specific telephone-network interface implementation before releasing a production layout. This product page combines manufacturer application guidance with package, interface, and sourcing information to help engineers identify the correct Si2435 configuration. It also documents the chipset relationship, explains the design roles of the Si2435 and Si2417, and highlights practical considerations for dependable embedded fax-modem integration.
SI2438-A-FT - 33.6kbps V.34 ISOmodem | Skyworks
Skyworks Solutions Inc. SI2438-A-FT is a 56k V.34 ISOmodem system-side IC with a maximum data rate of 33.6 kbps, packaged in a compact 24-TSSOP surface-mount package. It integrates data, fax, and voice modem functions for legacy communication equipment and is identified as obsolete by current product-status records. The 24-pin TSSOP package measures 4.40 mm in width and is supplied in tube packaging. An ISOmodem is a semiconductor implementation of the ITU-T V.34 modem standard. Within the telecommunications hierarchy, a V.34 modem belongs to data-communication ICs, interface ICs, and broader network-access semiconductors. It converts digital data into signals compatible with switched telephone networks while supporting call-control and voice-related functions. A system-side modem IC is commonly paired with a line-side counterpart, host interface circuitry, and isolation or telephone-network protection components. The SI2438-A-FT is identified as a 56k-class V.34 device, while comparison documentation states a maximum data rate of 33.6 kbps. Its key characteristics include a 24-TSSOP package, support for data, fax, and voice operation, and a lead-free construction. These characteristics suit compact embedded and telecom products that must retain compatibility with established V.34 equipment rather than migrate to a newer modem architecture. The device represents a compact integration of modem signal processing, control logic, and interface functions. Its 24-pin surface-mount format allows moderate board-space savings compared with a larger through-hole package, while tube packaging can support controlled manufacturing and automated assembly. System designers must account for the obsolete lifecycle status and confirm availability before committing to new production quantities. Typical uses include legacy fax equipment, data terminal interfaces, industrial data-communication equipment, voice-over-data systems, and embedded telecom products that require V.34 operation. A host processor and suitable telephone-line interface components remain necessary around the modem IC. The related SI2438-B-FT and SI2456-FTR devices can provide useful product-family migration options when their exact electrical and pin requirements are verified against the target design. For a new layout, use the 24-TSSOP footprint and the pin-description table in the manufacturer datasheet before assigning signals or routing sensitive telephone-network nodes. Check the telephone-line protection network, supply requirements, clocking, interface levels, and component tolerances. Because the SI2438-A-FT is obsolete, production continuity and lifecycle risk should be resolved before schematic release. This page consolidates the known package, data-format, voice, lifecycle, and environmental characteristics of the SI2438-A-FT with family alternatives and practical design guidance. The comparison tables focus on verified package and modem-function differences, helping engineers identify which same-package candidates merit a formal second-source review.
SI2438-B-GT - 33.6kbps V.34 ISOModem | Skyworks
Skyworks Solutions SI2438-B-GT is a 33.6 kb/s ISOModem network interface controller implementing V.34 data-modem technology in a surface-mount 24-pin TSSOP package. The 4.40 mm wide package combines a complete modem data path, parallel and serial host-interface support, and telephone-line-oriented signal functions in a compact integrated circuit. The SI2438-B-GT is also described in the 56k modem class, providing a bridge between legacy V.34 data communication and modern embedded equipment designs. An ISOModem is a single-chip integrated modem built around International Telephone and Consultative Committee modem technology. Unlike a collection of discrete filters, amplifiers, oscillators, and line-interface components, an integrated modem controller combines modulation, data handling, and control functions into one semiconductor. This makes the ISOModem category useful for embedded data communication, industrial terminal equipment, point-of-sale systems, and other products that must exchange data over a telephone or analog communications channel. The SI2438-B-GT's defining characteristics include a 33.6 kb/s data rate, V.34 modem operation, ISOModem architecture, and a 24-TSSOP surface-mount package. Its 4.40 mm package width supports compact circuit layouts while exposing separate communication, interface, control, and supply functions around the device. The source listing identifies it as a network controller and processor IC within the telecom interface category, making it suitable for equipment designers evaluating a dedicated modem controller rather than a general-purpose communications processor. The controller supports integration into embedded modem equipment where a standardized V.34 data path is required. Its parallel, SPI, and UART interface information is associated with the SI2438 family, while the device also provides voice-capable ISOModem operation. Designers should confirm the required host interface, line-side support components, clocking, and termination arrangement against the manufacturer documentation for the exact system configuration before releasing the PCB layout. Typical applications include legacy data terminals, industrial telemetry equipment, remote-control systems, fax-related data products, point-of-sale terminals, and embedded modem controller designs. The compact TSSOP package is particularly useful where a through-hole interface circuit would consume excessive board area. A complete implementation still requires the external analog line interface, isolation or surge-protection strategy, suitable supply rails, and firmware appropriate to the selected modem operating mode. The primary design consideration is interface completeness. Because SI2438-B-GT integrates modem control rather than every external telephone-line protection component, the board must include the required analog coupling and protection network. Confirm pin-level signal assignment, crystal or clock requirements, line-driver components, and supply sequencing directly in the pin-description table before schematic release. This page organizes the SI2438-B-GT specifications, verified package information, related modem controllers, and practical selection guidance into one engineering-focused reference. It also distinguishes documented V.34 operation from related family members whose ordering codes, descriptions, or interface emphasis differ.
SI2439-A-FM - V.34/V.92 Global DAA Modem | Skyworks
Skyworks Solutions SI2439-A-FM is a single-chip ISOmodem integrated circuit supporting V.34 and V.92 modem standards, operating at 33.6 kbps, and integrating a global DAA. The device is supplied in a surface-mount 38-pin QFN package measuring 5 mm by 7 mm and operates from a 3 V to 3.6 V supply. An ISOmodem is an integrated modem IC that combines a data-access arrangement with modem signal-processing functions. In the broader semiconductor hierarchy, it is a communication interface IC and a network controller/processor-class device that connects host equipment to analog telephone, WAN, or digital-network interfaces. The integrated DAA reduces the number of external telephone-line interface components needed in a connected product. The SI2439-A-FM is identified as a V.34 and V.92 modem solution with a stated data rate of 33.6 kbps. Its 38-QFN construction is intended for compact surface-mount equipment, while the exposed-pad package arrangement supports board-level thermal management. The 3 V to 3.6 V operating range allows the modem circuitry to operate from a regulated low-voltage rail in embedded communications equipment. This part belongs to Skyworks' ISOmodem family, where modulation, data pumping, line-interface functions, and a global DAA are consolidated into one mixed-signal semiconductor. Consolidation can reduce external component count and board area compared with a discrete modem implementation. The package also reduces interconnect complexity by placing the modem functions and their required land pattern on a single surface-mount device. Typical uses include embedded asynchronous modems, data communications equipment, telephone-network interfaces, industrial data links, and legacy WAN connectivity equipment. Selection is appropriate when a design specifically requires V.34 or V.92 compatibility, a 33.6 kbps modem channel, and the SI2439-A-FM's integrated global DAA. Host software, line-interface support, and regulatory certification must be evaluated as part of the complete modem subsystem. The principal design consideration is the exposed-pad footprint. Place the device according to the manufacturer's land pattern, provide all supply and ground connections, and follow the datasheet's recommended decoupling and thermal-layout requirements. Because modem performance depends on the surrounding telephone interface and implementation, validate conducted emissions, line behavior, and interoperability in the final equipment rather than relying only on individual IC measurements. This page consolidates the verified product identity, package information, modem standards, supply range, and sourcing information into one engineering reference. It also distinguishes confirmed device attributes from details that require direct review of the manufacturer datasheet, including the complete pin table, clocking requirements, line-interface values, and approved application configurations.
SI2439-A-GM V.34/V.92 ISOMODEM | Skyworks Solutions
Skyworks Solutions SI2439-A-GM is a V.34 and V.92 ISOmodem system-side interface integrated circuit housed in a 38-pin QFN package measuring 5 mm by 7 mm. The device operates at 33.6 kbps and is intended for data communication equipment requiring a complete analog telephone-interface modem solution. Its defining characteristics include support for ITU-T V.34 and V.92 protocols, a global DAA, a 3 V to 3.6 V supply range, and surface-mount construction. An ISOmodem is an integrated modem interface and data-access arrangement used within communications equipment. In this product category, the modem controller and telephone-line interface functions are combined to reduce the number of external components needed by the host system. Within the broader hierarchy, an ISOmodem is an interface IC, a communication IC, and ultimately a semiconductor designed to connect digital equipment to analog or digital communication channels. The SI2439-A-GM is identified by Skyworks Solutions as a V.34/V.92 modem with global DAA support. It supports operation up to 33.6 kbps, as confirmed by the product listing for the exact MPN. The 38-QFN package places the device in a compact surface-mount format suitable for high-density communication equipment, while the exposed-pad construction provides a defined path for heat transfer through the PCB. The 3 V to 3.6 V operating supply allows integration with common low-voltage digital systems. A primary use for this device is a data communications terminal or remote-access unit requiring a complete system-side modem. The global DAA can support country-specific telephone-line interfaces while the V.34 and V.92 capabilities provide compatibility with legacy and higher-speed modem standards. Integration can reduce board area compared with a discrete codec, line-driver, and controller implementation, although the host equipment must still satisfy the applicable telephone-network requirements. Designers should pay close attention to the analog line interface, supply decoupling, exposed-pad soldering, and signal-integrity layout. The manufacturer datasheet is the controlling document for pin assignments, recommended external circuitry, timing, electrical limits, and programming procedures. Because the modem connects directly to communication circuitry, keep sensitive analog routing separated from noisy digital and power-conversion paths, and provide the required bypass capacitors close to the supply pins. This product page organizes the exact SI2439-A-GM identity, package information, technical specifications, sourcing guidance, and verified same-family alternatives into one engineering reference. It also distinguishes confirmed catalog parameters from detailed electrical characteristics that must be established from the manufacturer datasheet before schematic capture or production release.
SI2456-FT 56 kbps ISOModem Chipset | Silicon Laboratories
The Silicon Laboratories SI2456-FT is a 3.3 V ISOModem chipset with an integrated global data access arrangement, operating at Bell 300 bps to 56 kbps data rates in a 24-lead TSSOP package. It supports V.21, V.22, V.23, V.32, V.32bis, V.34, V.42bis, V.90, Bell 103, and Bell 212A signaling. The SI2456-FT also provides more than 5000 V capacitive isolation, parallel phone detection, automatic rate negotiation, and a globally compliant line interface. An ISOModem chipset is an integrated data-over-voice modem optimized for telephone and wide-area-network endpoints. Within the broader modem hierarchy, it combines signaling functions, data-link protocols, and telephone-line interface circuitry in one IC. This integration reduces the number of external interface components required in designs that need asynchronous or synchronous data transfer over an analog phone line. The principal features of the SI2456-FT include a 3 V to 3.6 V supply range, 56 kbps maximum data rate, V.42bis and MNP2-5 error correction, automatic rate negotiation, parallel phone detection, and overcurrent protection. Its lead-free 24-TSSOP package supports conventional surface-mount assembly while exposing the device in the system-side modem format identified by the SI2456-FT ordering code. Technically, the device combines modem signal processing with an integrated global DAA. The DAA provides the telephone-line termination and isolation functions required for connected-line operation, while protocol support covers the principal ITU-T and Bell modem recommendations listed for the component. Automatic rate negotiation allows the modem to select an appropriate bearer rate from the capabilities of the connected endpoint, and V.42bis/MNP2-5 support improves transmission reliability on noisy lines. Typical uses include point-of-sale terminals, industrial data-collection equipment, remote telemetry systems, embedded telephone-network access, and legacy equipment requiring a Bell or ITU-T modem connection. The SI2456-FT is particularly appropriate where a compact surface-mount solution and integrated line isolation are more important than a high-speed broadband data interface. Designers should verify the exact board layout, external network-interface components, and firmware requirements against the manufacturer datasheet before production. Because this is an integrated line-side modem chipset, PCB creepage, isolation, grounding, and telephone-network compliance require careful implementation; substitution should never be based on package appearance alone. This page consolidates verified specifications, sourcing information, replacement guidance, and design considerations for the SI2456-FT. It also distinguishes a documented same-package family alternative from unverified substitutes, helping engineers make a defensible legacy-modem sourcing decision.
SI2457-C-FS - 56 kbps V.90 ISO Modem | Skyworks
The Skyworks Solutions SI2457-C-FS is a 56 kbps V.90 system-side ISOmodem integrated circuit that supports V.21, V.22, V.23, V.32, V.34 and V.90 data rates, along with Bell 103 and Bell 212A operation, in a 16-pin SOIC package. It provides the modulation and demodulation functions required to connect a digital data terminal or host interface to an analog telephone, fax or other analog line interface. An ISOmodem is a communications controller that divides a legacy analog modem into a digital controller and an analog interface function. The system-side SI2457-C-FS is intended to work with a complementary line-side codec or data access arrangement, allowing modulation and demodulation to be implemented in a multi-chip telephony system. It supports two packet structures defined by ETSI ES 201 912. Key capabilities include V.90 operation at 56 kbps, support for Bell 103 and Bell 212A signaling, and compatibility with the common V-series modem protocols listed in the product documentation. The device is specified in a 16-SOIC surface-mount package and is identified by the SI2457-C-FS ordering code. Its commercial temperature grade and gull-wing terminal arrangement are confirmed by distributor catalog data. The SI2457 family also includes related devices such as the SI2404, SI2415 and SI2434, all documented in the manufacturer data sheet. This family-level commonality allows engineers to evaluate different combinations of line-side codec, system-side modem and protocol support when designing analog terminal equipment, multi-rate fax systems or embedded telephone interfaces. Typical implementations place the SI2457-C-FS beside a line-side codec, host processor and telephone-line protection network. The host processor manages signaling and higher-layer protocol handling, while the SI2457-C-FS performs the bit-level modulation and demodulation required by the selected V-series mode. Exact supply voltage, interface timing and power consumption must be confirmed in the manufacturer data sheet before schematic release. When laying out this device, use the pin-description table and recommended application circuit in the manufacturer data sheet to assign the analog, digital and power pins. Pay particular attention to clocking, analog signal routing and the relationship between the system-side modem and the companion line-side device. This page organizes the confirmed protocol, package and sourcing information for the SI2457-C-FS, adds application guidance for telephony and data-terminal designs, and identifies the family-level options that are most relevant when evaluating an analog modem subsystem.
SI2457-C-FT 56 kbps V.90 Modem | Skyworks Solutions Inc.
Skyworks Solutions Inc. SI2457-C-FT is a 56 kbps data modem IC operating from a 3 V to 3.6 V supply in a 24-pin TSSOP package. It supports Bell and ITU-T modem formats including V.21, V.22, V.23, V.32, V.34, and V.90, with parallel phone detection and more than 6000 V of capacitive isolation. The device is associated with the Si2457/34/15/04 ISOmodem family of integrated data access arrangements. An integrated modem or data access arrangement converts serial digital data into line-frequency signaling compatible with telephone, fax, or data equipment. The SI2457-C-FT combines modulation, data-access, and telephone-line interface functions in one IC, reducing the number of external components required for a conventional modem design. It belongs to the modem IC hierarchy within interface integrated circuits, where protocol conversion and physical-line signaling connect digital hosts to analog communication networks. Key features include support for data rates through 56 kbps, automatic rate negotiation using MNP2-5, V.42bis error correction, parallel phone detection, DTMF detection, and a built-in phase-locked loop. Its 3.3 V operating point suits modern 3 V digital systems, while the integrated DAA provides galvanic separation from the telephone line through capacitive isolation. The commercial-temperature rating supports indoor telecom, industrial control, fax, and data-communication equipment. Technically, the SI2457-C-FT is a system-side modem solution rather than a general-purpose transceiver. Its protocol support allows a host processor to establish modem connections across PSTN or equivalent line systems. The built-in phase-locked loop supports stable symbol timing, and the integrated telephone-interface functions simplify the analog line path. Designers should still account for line protection, regional impedance requirements, coupling components, and the complete reference circuit described in the manufacturer data sheet. Typical uses include legacy fax equipment, remote-access terminals, industrial monitoring links, embedded telephone interfaces, point-of-sale systems, and communications equipment that must support both V.21-class low-speed data and V.90-class 56 kbps operation. The broad protocol set makes the IC useful where interoperability with older telephone infrastructure matters more than raw data throughput or a modern packet-based interface. A critical design consideration is the telephone-line interface. The manufacturer data sheet specifies the external component values, isolation network, hook and phone-detection circuitry, and layout constraints required for reliable operation. Keep sensitive line-side routing compact, provide the specified protection network, and observe the required creepage and clearance distances for the intended installation class. This product page consolidates the SI2457-C-FT electrical characteristics, package information, protocol capabilities, application guidance, and confirmed same-package alternatives. It also highlights practical distinctions among closely related Si2457-family devices so engineers can assess footprint reuse, modem features, and implementation constraints before placing a part on a new design.
SI2457-D-FS - 56 kbps ISOmodem IC | Skyworks Solutions
The Skyworks Solutions Inc. SI2457-D-FS is a 56 kbps system-side ISOmodem integrated circuit operating from a 3.3 V supply in a 16-pin SOIC package. It supports ITU-T V.21, V.22, V.23, V.32, V.34 and V.90 signaling, Bell 103 and Bell 212A operation, and related data-modem formats. The device combines modulation and demodulation functions with on-chip modem firmware for embedded telephone-line data communication. An ISOmodem is a complete integrated data-modem circuit designed to operate with a separate telephone-network interface or data access arrangement. Within the product hierarchy, the SI2457-D-FS is a modem IC, a physical-layer data-communication IC, and an interface semiconductor. Its system-side architecture is intended for equipment that must generate and receive analog telephone-line signals while keeping protocol processing and line-interface functions under the control of embedded host hardware. Key capabilities include data rates through 56 kbps, automatic rate negotiation, Fast Connect operation, V.42bis error correction, MNP2-5 support, and Type I and Type II caller-ID decoding. The family also supports parallel phone detection and more than 6000 V of capacitive isolation. These functions allow one controller to connect with legacy analog modems, fax equipment, remote-access systems, and other products that still rely on switched telephone networks. The Si2457/34/15/04 family architecture includes on-chip program ROM containing firmware for the documented features, together with program RAM for minor firmware changes. The SI2457-D-FS designation identifies the SI2457 member and Revision D device configuration. Its 3.3 V operation suits modern embedded systems, while the 16-pin SOIC package supports conventional surface-mount assembly and compact peripheral-interface layouts. Typical uses include industrial serial-to-telephone gateways, remote monitoring equipment, data-over-voice terminals, legacy controller migration projects, and telephone-line access modules. Designers can use the modem circuit with a line-interface network, isolation components, and a host processor that implements the required data framing and control protocol. The V.90 capability is particularly useful for low-rate connections where compatibility matters more than maximum throughput. Designers should follow the manufacturer datasheet for the external line-interface network, crystal requirements, supply bypassing, and exposed-ground configuration. The 0 to 70 C operating range is suitable for commercial indoor equipment but not for extended industrial-temperature environments. PCB signal integrity also matters because modem timing, isolation boundaries, and telephone-line return paths can introduce noise if layout guidance is not followed. This page combines the manufacturer data-sheet details, interface-function breakdown, packaging constraints, application guidance, and selection criteria in one engineering-focused reference. It also identifies where a true pin-to-pin replacement must be checked against the complete electrical interface rather than inferred from the data rate or package name alone.
SI2457-D-GT - 56 kbps ISOMODEM | Skyworks Solutions
Skyworks Solutions Inc. SI2457-D-GT is a 56 kbps system-side ISOMODEM data-communication IC operating from a 3.3 V supply and housed in a 24-pin TSSOP package. It supports ITU-T and Bell modem formats including V.21, V.22, V.23, V.32, V.34, V.90, Bell 103, and Bell 212A, with additional V.42, V.42bis, V.44, MNP2-5, and caller-ID functions documented for the Si2457/34/15/04 family. An ISOMODEM is a semiconductor implementation of a modem's modulation, demodulation, and protocol functions. It belongs to the modem IC hierarchy, integrates data-link signaling with a host-facing controller interface, and is commonly positioned between a host processor and a telephone or data-network interface. Its primary design purpose is to reproduce standardized modem signaling without requiring a discrete modem subsystem. The SI2457-D-GT supports data rates from Bell 300 bps through 56 kbps, automatic rate negotiation, Type I and Type II caller-ID decoding, and parallel, UART, or SPI host interfaces. Its on-chip program ROM provides the firmware for the documented features, while program RAM permits minor firmware changes. Flexible clocking includes a low-cost 32.768 kHz oscillator option and a 4.915 MHz clock option. The device includes global capacitive isolation rated at more than 6,000 V and parallel phone detection. These characteristics allow the modem circuitry to interface with a telephone line while maintaining separation between line-side and logic-side functions. The SI2457 family is intended for interoperable data communications where V-series protocols, caller identification, and a compact controller implementation are required. Typical uses include embedded modems, fax equipment, data terminals, industrial communication equipment, and telephone-line data products. Designers should select the interface mode and clock arrangement that match the host controller and line interface, and should use the manufacturer pin-description table when assigning PCB nets. A key design consideration is that a shared 24-pin TSSOP footprint does not by itself guarantee firmware-level interchangeability. Review the protocol list, clock requirements, interface selection, isolation implementation, and exact orderable suffix before treating another device as a replacement. This page combines the manufacturer's Revision D family datasheet, distributor identification, supported protocol details, package information, and practical replacement criteria to support component selection, PCB planning, and sourcing.
SI2493-C-FS 56 kbps V.92 ISOmodem | Skyworks Solutions
The Skyworks Solutions Inc. SI2493-C-FS is a 56 kbps V.92 ISOmodem system-side interface IC supporting V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, and Bell 212A data formats. The device is packaged in a 16-pin SOIC measuring 0.154 inch by 0.390 inch and is supplied in a tube. A V.92 ISOmodem is a system-side data communications controller designed to connect a host or embedded system with a telephone network interface. In the ISOmodem architecture, the SI2493-C-FS handles modem signal processing and data modulation while an external data access arrangement supports computer-side connectivity. It belongs to the broader hierarchy of modem IC, network interface controller, interface IC, and semiconductor. The principal feature of the SI2493-C-FS is its combination of legacy and V.90/V.92 modulation support in one integrated device. Its listed formats include V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, and Bell 212A. The 56 kbps V.92 operating rate and extensive protocol coverage make the device suitable for specialized data equipment that must interoperate with older telephone-network equipment. The 16-pin SOIC is offered as the footprint-compatible system-side implementation associated with the Si2401 ISOmodem family. This package option supports conventional surface-mount PCB assembly while retaining access to the modem functions required by compact embedded and industrial data products. The suffix identifies a specific ordering configuration; the manufacturer datasheet remains the controlling document for electrical limits, clocking, interface behavior, and application wiring. Typical uses include legacy modem pools, industrial data communication equipment, telephone-line monitoring systems, point-of-sale terminals, and embedded access products requiring Bell or V-series compatibility. Because V.92 modem designs include analog telephone-line characteristics, component selection must account for the external line interface, isolation, filtering, ring detection, and the host-side communication requirements of the complete system. For a new PCB, use the 16-pin SOIC footprint and follow the manufacturer pin-description table and typical application circuit. Do not assume that footprint compatibility alone guarantees functional interchangeability. Review clock requirements, supply sequencing, interface signals, country-specific line-network behavior, and external analog components before transferring an existing design to SI2493-C-FS. This product page combines the manufacturer data-sheet information, interface and package characteristics, protocol coverage, verified sourcing records, and practical implementation guidance. It also distinguishes explicitly documented replacements from merely similar modem ICs so engineers can assess PCB reuse, protocol support, and system-level risk before making a sourcing decision.
SI2493-C-FT 56 kbps ISOModem | Skyworks | 24-TSSOP
Skyworks Solutions SI2493-C-FT is a system-side ISOmodem network controller and processor IC supporting V.21, V.22, V.23, V.29, V.32, V.34, V.90 and V.92 data formats, Bell 103 and Bell 212A signaling, and a maximum data rate of 56 kbps. The device is packaged in a 24-TSSOP package. An ISOmodem is a mixed-signal communications IC that combines modem signal processing with a controller and host-side interface functions. Within the semiconductor hierarchy, it belongs to the modem and network-controller category, while also functioning as a transceiver for analog telephone-line signaling. Such devices provide a hardware interface between a host processor and a communications channel, reducing the amount of modem signal-processing software required in the host. The SI2493-C-FT supports several ITU V-series and V.92-related data formats together with Bell 103 and Bell 212A modes. This multi-format capability makes it relevant to telephone-line data equipment, embedded data communication systems, and legacy access-device designs. Its stated 56 kbps operating rate places it in the low-speed modem class rather than broadband, Ethernet, or high-speed DSL transceiver categories. The 24-TSSOP package provides a standardized surface-mount form factor with leads on both sides of the package. The SI2493-C-FT is identified with the -C-FT ordering suffix and is supplied in tube packaging according to the package information associated with the part. Because modem performance depends on the complete line interface, external circuitry, crystal requirements, isolation strategy and host configuration, designers should evaluate the device against the exact manufacturer datasheet and reference circuit rather than infer those details from the family name alone. Typical uses include compact customer-premises equipment, telephone-line data controllers, embedded communication appliances and data-over-voice terminal equipment. In these systems, the IC can perform modulation and demodulation while the host manages the application, connection policy and user interface. The final system still requires careful separation of the analog line interface from sensitive digital circuitry. For layout, place the modem and associated line-interface components according to the manufacturer reference design, with particular attention to analog ground, supply decoupling and copper return paths. Use controlled impedance routing for digital interfaces where applicable, and avoid introducing long loops around the telephone-line interface. Verify thermal performance, regulatory constraints and line-interface component ratings for the deployment region. This page consolidates the SI2493-C-FT ordering information, supported data formats, package details, replacement guidance and engineering-selection considerations into a compact design reference. It also identifies the verified direct substitute and highlights which electrical and pin-level details must be confirmed in the manufacturer datasheet before a new layout or production release.
SI2493-D-FS - 56 kbps V.92 ISOmodem | Skyworks Solutions
The Skyworks Solutions SI2493-D-FS is a complete ITU V.92-compliant system-side ISOmodem that supports full-duplex data connections at rates up to 56,000 bps over the Public Switched Telephone Network. It is supplied in a 16-pin SOIC package and integrates a global data access arrangement for telephone-line modem designs. An ISOmodem is a modem controller and data-access arrangement integrated into one semiconductor. In this architecture, the controller processes modulation protocols and line-interface functions while the data access arrangement connects the modem to the telephone network. ISOmodems are used when a system needs legacy PSTN connectivity in a compact, integrated implementation rather than a collection of separate modem, codec, and interface circuits. The SI2493-D-FS supports ITU-T V.21, V.22, V.23, V.29, V.32, V.34, V.90, and V.92 data formats. Its data set also includes Bell 103 and Bell 212A formats, V.44 compression with V.42, V.42bis, and MNP2-5 support, automatic rate negotiation, PCM upstream operation, and V.92 quick connect. The combination of V.92 data rates and quick-connect functionality targets systems requiring faster modem call establishment over analog telephone lines. The device uses a complete modem architecture for full-duplex PSTN operation, with conventional data formats supported through 56,000 bps. This makes it suitable for embedded data collection, remote equipment access, point-of-sale terminals, and industrial controllers that must communicate with legacy analog telephone infrastructure. The integrated global DAA reduces the number of discrete telephone-interface components required in a conventional modem design. The SI2493-D-FS is specified in a 16-pin SOIC package for surface-mount assembly. Circuit implementation requires attention to the telephone-line interface, isolation requirements, analog signal routing, and the power connections defined by the manufacturer datasheet. Use the published reference design and pin-description table when assigning PCB nets because analog telephone nodes must not be routed like ordinary digital signals. This page organizes the SI2493-D-FS protocol capabilities, package details, application guidance, and practical design considerations for engineers evaluating legacy PSTN connectivity. It also distinguishes documented device attributes from parameters that require confirmation from the full manufacturer datasheet before schematic release or production qualification.
SI2493-D-FT - 56 kbps V.92 ISOmodem | Skyworks
Skyworks Solutions Inc. SI2493-D-FT is a 56 kbps V.92 ISOmodem system-side integrated circuit designed for full-duplex data transmission over the Public Switched Telephone Network. It supports conventional V-series modem formats, V.92 functions, Bell 103 and Bell 212A operation, and automatic rate negotiation. The device is housed in a 24-pin TSSOP package for surface-mount assembly. An ISOmodem is a complete integrated modem solution that combines data-path modulation, telephone-interface functions, and system-side control in one IC. In the telecommunications hierarchy, the SI2493-D-FT belongs to the modem-controller and network-interface class of integrated circuits. Its purpose is to let a host processor exchange synchronized digital data with a legacy analog telephone line without requiring a large collection of discrete codec, filter, and interface components. The SI2493-D-FT supports ITU V.21, V.22, V.23, V.29, V.32, V.34, and V.90 operation, together with V.92 features. The Skyworks data sheet also identifies V.42bis, MNP2-5, automatic rate negotiation, V.92 PCM upstream, V.92 Quick Connect, and modem-on-hold capabilities. Bell 103 and Bell 212A compatibility broadens interoperability with older terminal equipment and network services. Revision D represents the documented version of the SI2493 design used by this component. The global DAA interface supports connection of the modem to a telephone network, while the data-side interface provides the path between the modem and host equipment. The SI2493-D-FT also incorporates a 6000 V capacitive isolation rating in its documented feature set, making isolation-aware circuit design an important part of telephone-interface implementation. Typical uses include PSTN data terminals, industrial serial-to-telephone gateways, remote monitoring controllers, legacy equipment retrofits, embedded telephone adapters, and data communication equipment supporting older Bell and ITU protocols. Its 56 kbps maximum connect rate targets data applications where backward-compatible analog telephone access is required rather than broadband connectivity. The primary design consideration is line-interface implementation. The host PCB must preserve the modem data interface, provide the required clocking and control signals, and implement the DAA network connection with appropriate isolation, surge protection, and hook-state handling. Use the pin-description and typical application diagrams in the Skyworks Solutions data sheet when assigning package pins and selecting external telephone-network components. This page combines protocol capabilities, package information, drop-in replacement findings, and practical design guidance. It helps engineers distinguish revision and ordering differences while identifying the electrical and thermal checks required before incorporating this legacy-PSTN modem into a new design.
SI2494-A-GM 56 kbps V.92 Modem IC | Skyworks Solutions
The Skyworks Solutions SI2494-A-GM is a 56 kbps system-side ISOmodem data communications controller supporting ITU-T V.21, V.22, V.29, V.32, V.34, V.42, V.42bis, V.44, and V.92 data modem formats, with Bell 300 bps support, MNP2-5, Fast Connect, and V.92 Quick Connect. The device is packaged in a 38-pin QFN with exposed pad measuring 5 mm by 7 mm. A data modem IC converts serial data into modulation formats suitable for analog telephone, fax, and legacy WAN connections. The SI2494-A-GM belongs to the controller and processor class of integrated circuits, combining protocol handling, caller-ID decoding, rate negotiation, and host-interface control in one device. Its system-side architecture is intended for embedded equipment that connects a host processor to an analog line interface. Key capabilities include operation up to 56 kbps under V.92, support for V.42 and V.42bis error correction, MNP2-5 automatic rate negotiation, V.92 PCM upstream operation, and Type I and Type II caller-ID decoding. The host can connect through UART, SPI, or a parallel interface, allowing integration with different embedded controller architectures. The chip also accepts flexible clocking options and can use a low-cost 32.768 kHz oscillator. The SI2494-A-GM avoids external ROM or RAM for its modem functions, reducing the number of supporting components required around the data path. Bell 300 bps operation and the broader ITU-T format set preserve compatibility with older terminal equipment, while V.92 support enables higher-rate analog data sessions where the connected line and service support it. Typical applications include industrial data terminals, point-of-sale systems, remote-access equipment, fax machines, telephone-interface gateways, and embedded modem modules. The 38-QFN package is suitable for compact surface-mount assemblies, but careful treatment of the exposed thermal pad and high-speed clock and interface routing is important for dependable operation. Design the supply, analog-line interface, clock source, and host interface according to the manufacturer reference schematic. Keep the exposed-pad connection unobstructed, follow the recommended decoupling arrangement, and validate timing margins across all three supported host-interface modes. Firmware must also select the correct regional modem profile, negotiated rate, and V.92 capability. This product guide combines the confirmed modem features, package information, interface choices, and application guidance with practical replacement and design context. Use the manufacturer datasheet pin-description table and reference circuit when assigning PCB tracks and selecting external analog-line components.
SI3000-C-FS - 16-Bit Voice Codec | Skyworks Solutions
Skyworks Solutions SI3000-C-FS is a 16-bit voice-band audio codec with a serial interface, programmable input and output gain or attenuation, microphone bias, a handset hybrid circuit, and output drive for 32-ohm headphones. The device operates from 3 V to 5.25 V and is packaged in a 16-pin SOIC. A voice-band audio codec converts analog voice signals into digital data for transmission and reconstructs digital audio into an analog signal for playback. The SI3000-C-FS integrates several telephone-interface functions that otherwise require separate components, including microphone amplification, output drive, microphone bias, and handset hybrid support. Its 16-bit serial interface allows it to connect with compatible modem and data-access-arrangement devices. Programmable input and output gain or attenuation provide control over signal levels in analog voice paths. The integrated microphone bias circuit supports microphone-based input stages, while the output driver is specified for 32-ohm headphones. These functions reduce the number of external analog components required in a voice-band interface. The SI3000 family is intended for voice-band equipment, including ISOmodem and digital access equipment. The SI3000-C-FS can connect directly to Si3035, Si3044, and Si3056 North American and international DAA chipsets through the serial interface, allowing an analog voice path to be paired with an established line-interface chipset. Supply-voltage operation from 3 V to 5.25 V makes the codec usable in 3.3 V and 5 V systems. The listed operating-temperature range is 0 C to 70 C. Because this is a mixed analog-and-serial-interface device, correct grounding, supply decoupling, clock implementation, and layout of the voice path directly affect signal integrity and audio performance. For a new design, use the manufacturer pin-description table and recommended application circuit when assigning PCB tracks, setting gain, and selecting support components. Pay particular attention to analog and digital return paths, the microphone-bias connection, and the output-drive network. The 16-pin SOIC footprint supports conventional surface-mount assembly but requires adequate copper and thermal considerations for reliable soldering. This page combines device capabilities, application fit, sourcing guidance, and practical design notes to help engineers evaluate the SI3000-C-FS for compact voice-band systems. It also distinguishes verified compatibility from unknown replacement options so procurement decisions can be based on package, interface, and electrical requirements rather than MPN similarity alone.
SI3000-C-GS - 16-Bit Voice-Band Audio Codec | Skyworks
The Skyworks Solutions Inc. SI3000-C-GS is a 16-bit voice-band audio codec with 84 dB ADC dynamic range, 84 dB DAC dynamic range, and 4–12 kHz sample rates in a 16-SOIC package. It integrates a 30 dB microphone preamplifier, programmable input and output gain or attenuation, microphone bias, handset hybrid circuitry, and output drive for 32 Ω headphones. A voice-band codec is a specialized audio interface that converts analog microphone or line-level signals into a digital serial stream and converts digital audio back into an analog output. Within the hierarchy of audio codecs, line codecs, audio interface ICs, and interface semiconductors, it concentrates several telephone and modem signal-chain functions into one device. Its narrowband sampling range is intended for speech rather than hi-fi music. The SI3000-C-GS provides one ADC and one DAC, both using 16-bit resolution. Programmable input and output gain or attenuation gives the system designer control over signal levels, while the 30 dB microphone preamplifier supports direct microphone conditioning. The integrated bias circuit reduces external microphone-support requirements, and the headset driver is specified for 32 Ω loads. Integration is a central advantage because the codec combines the analog voice interface, conversion functions, and telephone-support circuitry. According to the manufacturer datasheet, the device can connect directly with Si3034, Si3035, Si3044, and Si3056 data-access arrangements and chipsets. These interfaces support voice-band modem and telephone equipment where board area and component count are important constraints. Typical applications include voice-band modems, telephone interface boards, handsets, speakerphones, voicemail equipment, and data-access adapters. The 16-SOIC package also makes the SI3000-C-GS suitable for designs that require conventional surface-mount assembly rather than a high-density land grid array. When designing around this codec, verify the required analog supply, digital interface voltage, sampling clock, and serial device configuration against the manufacturer pin descriptions and application guidance. Decoupling, grounding, and microphone-bias layout remain critical because they directly influence noise, distortion, and voice intelligibility. This product data combines the confirmed electrical characteristics, package information, interface functions, application fit, and design considerations needed to evaluate the SI3000-C-GS for a voice-band audio signal chain.
SI3000-KS - 16-Bit Voice Codec | Skyworks Solutions
Skyworks Solutions SI3000-KS is a 16-bit voice-band interface codec with one ADC channel and one DAC channel, supporting sample rates from 4 kHz to 12 kHz in a 16-pin SOIC package. The verified listing identifies 84 dB ADC dynamic range, 84 dB DAC dynamic range, a 30 dB microphone preamplifier, programmable input gain or attenuation, and programmable output gain or attenuation. It is intended for voice-band audio systems requiring integrated conversion and microphone or speaker drive functions. The distributor data also identifies the SI3000-KS as a leaded interface codec and reports that Skyworks recommends the Si3000-C-FS datasheet for current design work. This means lifecycle status should be confirmed before new production commitments, although the SI3000-KS remains listed by distributors. A voice-band codec is an audio interface integrated circuit that converts analog microphone or line-level signals into digital PCM data and converts digital audio back into an analog output. In the broader device hierarchy, the SI3000-KS belongs to audio codecs, interface ICs, signal-conversion devices, and semiconductor components. Its one-ADC and one-DAC architecture is suitable for compact telephony, communications, embedded voice, and audio-assistance designs where a dedicated low-bandwidth audio path is required. The 4 kHz to 12 kHz sample-rate range targets narrow voice bandwidth rather than full-spectrum hi-fi audio. The main engineering benefits are the stated 84 dB conversion dynamic range, integrated microphone and speaker-drive support, and programmable analog gain controls. Input gain or attenuation helps match microphone levels to the converter, while output gain or attenuation helps condition the playback signal before the speaker amplifier. The 30 dB microphone preamplifier provides additional headroom for weak microphone sources. Because the verified data does not provide supply voltage, clock requirements, control-interface details, absolute maximum ratings, or thermal data, those values must be obtained from the manufacturer datasheet before final schematic or PCB approval. Use the SI3000-KS when the design specifically needs a narrowband voice codec with integrated ADC, DAC, microphone preamplification, and programmable gain. Suitable application directions include telephone handsets, intercom systems, industrial voice terminals, automotive voice interfaces, and embedded communication modules. The automotive positioning appears in distributor descriptions, but qualification status and exact environmental requirements are not independently established by the supplied data and therefore remain unknown. A design must also verify that the required sample rate, serial interface, audio levels, power rails, and external components match the device datasheet. The principal design consideration is lifecycle risk. Mouser states “Leaded - Not recommended for new designs, see Si3000-C-FS datasheet,” while DigiKey lists SI3000-KS for purchase. Engineers should therefore treat the SI3000-KS as a potentially legacy or transition-related device and compare it with the recommended current family before committing a new design. The exact pinout is not reproduced in the supplied verified snippets, so pin-level wiring must be confirmed from the official manufacturer datasheet. This page combines the verified distributor classification and specifications with procurement context and design guidance without inventing missing electrical parameters. This page synthesizes distributor listings, lifecycle notices, codec specifications, replacement guidance, and practical application considerations. It distinguishes verified facts from unavailable parameters, highlights the Skyworks recommendation concerning Si3000-C-FS, and avoids treating a distributor availability statement as proof of long-term design support.
SI3010-FS - 2.4 kbps Global DAA | Silicon Labs
The Silicon Labs SI3010-FS is a 2.4 kbps direct access arrangement integrated with a global DAA and supplied in a 16-pin SOIC package. It operates from a 3 V to 3.6 V supply, supports a 0°C to 70°C temperature range, and is intended for telephone-line interface and ISOmodem applications. The SI3010-FS combines the line-side signaling functions of a direct access arrangement with the digital interface requirements of a V.22bis ISOMODEM system. A direct access arrangement, or DAA, is the line-side interface between a modem data terminal and a public switched telephone network. It converts analog line conditions into signals that can be processed by modem circuitry while providing the required isolation, hook-state detection, dialing, and line-current handling. A global DAA is designed to support internationally configurable telephone-line behavior rather than a single country-specific line interface. The SI3010-FS provides a 2.4 kbps data rate and operates from 3 V to 3.6 V, making it suitable for legacy V.22bis-class data communication equipment. Its 16-pin SOIC package is a surface-mount format suitable for automated assembly, and the reel configuration supports production feeding. The documented operating range of 0°C to 70°C identifies the SI3010-FS as a commercial-temperature device. The integrated DAA reduces the number of external line-interface functions required in a complete modem design. This can simplify the printed-circuit-board layout while preserving a standardized telephone-line interface. Because the part belongs to the Si2401 and Si2404 ISOmodem families, it is particularly relevant to designs requiring a line-side DAA paired with established modem controller or codec functionality. Typical uses include 2400 bps modem hardware, fax and data terminal equipment, industrial data links operating through telephone networks, and legacy communications controllers that require a globally programmable DAA. The SI3010-FS is also useful when a completed modem design must be maintained with an established 16-pin SOIC footprint and 2.4 kbps class performance. Designers should verify the complete SI3010 or Si240x companion-device arrangement because the DAA also requires suitable line-interface components and an appropriate host or modem companion. PCB layout must preserve the manufacturer's recommended analog and digital partitioning, while component selection must account for the telephone network's voltage and current requirements. This page consolidates verified distributor references, package and operating details, available replacement references, and practical selection guidance. It also identifies which technical and commercial values remain unavailable rather than presenting estimated specifications as verified facts.
SI3010-GS - 3.6V DAA Interface IC | Silicon Labs | Telecom
Silicon Labs SI3010-GS is an obsolete telecom interface IC implementing a Direct Access Arrangement (DAA) in a 16-pin SOIC package. The device operates from a 3 V to 3.6 V supply, consumes 15 mA, and is specified over a 0°C to 70°C temperature range. Its documented interfaces include parallel, SPI, and UART connections, while its 16-SOIC package measures approximately 3.90 mm in width. These specifications position the SI3010-GS as a line-side DAA controller for legacy telecom equipment rather than a general-purpose interface device. A Direct Access Arrangement is a subscriber-line interface controller that separates a telephone line codec from the host digital signal processor or CPU. In this product hierarchy, the SI3010-GS is a DAA interface IC within the broader category of telecom interface ICs. Such devices traditionally handled line-state signaling, loop control, and the host-side data interface used by customer-premises equipment, telephone adapters, and other legacy voice systems. The SI3010-GS offers a 3 V to 3.6 V operating supply, 15 mA supply current, and parallel, SPI, and UART host-interface options. Its 16-pin SOIC construction supports conventional surface-mount assembly and tubing or reel-handling workflows. Because the published status is obsolete, procurement decisions should emphasize confirmed availability, original manufacturer traceability, and functional equivalence with the specific firmware and line-interface implementation. Technically, the combination of a DAA function and multiple serial host interfaces allows the device to sit between a line-side codec or network termination path and an embedded controller. Parallel access can support legacy processor buses, while SPI and UART simplify connection to modern controllers. The 3.3 V-class supply also makes the device compatible with 3.3 V embedded systems, provided the associated clocking, reset, and interface levels comply with the system design. Typical uses include legacy Voice over IP terminal designs, embedded voice bridges, telephone-line interface modules, and industrial telecom equipment that retains a Silicon Labs-compatible DAA architecture. Replacement work should verify not only voltage and package dimensions but also register behavior, interrupt timing, clock requirements, line-side integration, and the host firmware's expectations. The principal design consideration is lifecycle risk: the SI3010-GS is listed as obsolete, so production continuity cannot be assumed. Engineers should obtain a controlled stock source, confirm the exact MPN and package, and validate any substitute against the manufacturer's SI3010 documentation before production release. This page consolidates the verified supply range, package details, lifecycle information, interface capabilities, and qualified same-footprint alternatives into one engineering-focused record. It also distinguishes documented facts from missing electrical details, helping designers evaluate sourcing risk and replacement decisions without inferring unsupported pinout or performance data.
SI3010-KS - 3.3V Global Serial DAA | Silicon Labs | Telecom
The Silicon Labs SI3010-KS is a 3.3 V direct access arrangement interface IC designed for global telephone-line applications, with a 3 V to 3.6 V supply range, 15 mA operating current, and a 16-pin SOIC package. Its programmable line interface supports parallel, SPI, and UART host connectivity, making it suitable for compact subscriber-line equipment and other telecom interfaces that need to minimize external analog-front-end components. A direct access arrangement, or DAA, is a semiconductor interface that connects a digital communications system to an analog telephone line. In the broader hierarchy, a DAA belongs to the telecommunications interface class, which sits within interface ICs and broader semiconductor solutions. Instead of implementing every line-side function with separate analog, isolation, switching, and signal-conditioning components, a DAA IC consolidates those functions into a controlled silicon interface. The SI3010-KS operates from a 3 V to 3.6 V supply and is identified by distributor listings as a single-circuit telecom DAA. Its available interface choices include parallel, SPI, and UART, giving the system designer several host-bus options for registering, configuration, and line-status monitoring. The listed operating current of 15 mA provides a concrete power figure for preliminary 3.3 V rail budgeting in compact telecom equipment. The device is supplied in a 16-SOIC package measuring 3.90 mm in body width. Distributor records identify both tube packaging and surface-mount construction, while the package family remains SOIC, a surface-mount technology also known as small-outline integrated circuit packaging. The 16-pin arrangement supports a relatively compact land pattern compared with larger leaded telecom-interface packages. Typical uses include Voice over IP subscriber terminals, analog telephone adapters, customer premises equipment, embedded voice systems, and other products that must bridge a digital controller with a telephone line. The exact line-side operating modes, country-specific network requirements, and host protocol details should be confirmed in the manufacturer datasheet before production release. Design planning must account for the 3.3 V supply tolerance, the 15 mA current requirement, the analog telephone-line environment, and the need for correct external protection and hook-related circuitry. Because a DAA is safety- and network-interface sensitive, PCB routing, isolation boundaries, surge exposure, and regulatory requirements should be reviewed as a complete design rather than treated as a generic serial-interface layout. This product record combines verified distributor specifications, package information, cross-reference results, drop-in replacement analysis, application guidance, and design considerations. It highlights where the SI3010-KS matches the published SI3010-F-FSR comparison data and clearly identifies parameters that remain unverified rather than estimating unsupported electrical details.
SI3012-KS - V.90 Global MC'97 Silicon DAA | Silicon Laboratories
Silicon Laboratories SI3012-KS is a Global MC'97 silicon direct access arrangement for modem and telephone-line-interface applications, combining an AC'97 2.1-compliant primary or secondary codec with a global phone-line interface. The device provides 84 dB dynamic range across its transmit and receive paths, operates from a 5 V power supply, and is offered in a 16-pin SOIC package. A direct access arrangement, or DAA, is the telephone-interface portion of a modem or communications system. It connects the host codec and modem data path to an analog telephone line while providing the signaling, isolation, and transmit/receive functions needed for global line-interface operation. In the component hierarchy, the SI3012-KS is a communications interface IC rather than a general-purpose codec or memory device. Verified feature data identifies AC'97 2.1 compliance, support for primary or secondary codec operation, and compatibility with FCC, CTR21, JATE, and other public telephone network requirements. Its 84 dB dynamic range provides the principal quantified signal-path performance figure, while the 5 V supply simplifies integration with conventional communications equipment. The SI3012-KS is specifically associated with V.90 modem designs and is listed as a Modem V.90 device in 16-SOIC packaging. The product is marked not recommended for new designs, with Si3018 identified by the distributor listing as the recommended successor for new-product planning. This lifecycle distinction is important for maintenance and repair work involving existing V.90 equipment. Typical uses include V.90 data-modem hardware, analog telephone-line interfaces, primary and secondary AC'97 codec connections, and legacy communications equipment requiring global telephone-network interface support. Its 5 V operating supply and 84 dB transmit/receive dynamic range fit established analog modem architectures, while the stated regulatory and PTT compatibility support deployment across multiple international line standards. Designers should preserve the manufacturer's reference circuit and verify the external isolation, line-interface, and codec connections against the SI3012-KS datasheet. Because the SI3012-KS is not recommended for new designs, new products should evaluate the Si3018 instead of assuming functional interchangeability. The available search data does not provide a verified pinout, detailed timing specification, or manufacturer pricing, so those values should be confirmed before schematic capture or procurement. This page distinguishes the SI3012-KS communications DAA from the similarly named Sanken SI-3012KS low-dropout regulator, consolidates verified lifecycle and feature information, and identifies the documented successor path for engineers evaluating legacy V.90 modem designs.
SI3014-KS Global MC-97 DAA | Silicon Labs | Telecom
The Silicon Labs SI3014-KS is a global MC-97 direct-access-arrangement interface IC with an AC97 2.1-compliant codec interface, 84 dB transmit and receive dynamic range, a 5 V power supply, and greater-than-3000 V isolation. It is supplied in a surface-mount, 16-SOIC package measuring 0.154 inches, or 3.90 mm, in width. A direct-access arrangement, or DAA, is a telephone-line interface device that places a codec and line-side transceiver behind a digital host interface. In the broader hierarchy, the SI3014-KS belongs to interface ICs, telecom line interfaces, modem ICs, and semiconductor ICs. Its MC-97 architecture helps a host codec control the digital and analog telephone-line signal path while the integrated isolation barrier separates host-side circuitry from line-side circuitry. The verified data identifies the SI3014-KS as a primary or secondary codec interface that is compliant with FCC, CTR21, JATE, and other PTT requirements. Its 84 dB dynamic-range TX/RX paths support voice-quality signal handling. Operation from a 5 V supply and compatibility with 3.3 V-related product information may be useful in mixed-voltage telecom designs, but circuit-specific voltage limits must be confirmed against the manufacturer datasheet before implementation. The device uses ASK over home power lines as its listed data format, while additional source material identifies it as a global MC-97 silicon DAA for telephone and modem interfaces. These descriptions place it between a digital audio codec and an analog phone line, with isolation helping control fault energy and common-mode coupling. Users should account for the non-RoHS and contains-lead status stated in the verified distributor data when evaluating regulatory and assembly requirements. Typical uses include legacy caller-ID, fax, answering-machine, voice-mail, modem, PBX, and embedded telephone equipment. In these systems, the MC-97 interface can connect a host processor to the line-side transceiver while the AC97 link carries digital audio and control traffic. Existing equipment may also use the SSI interface described in distributor listings, although the exact supported interface configuration must be checked against the original system design. Designers should not treat the isolated line interface as a universal drop-in replacement without reviewing the pinout, supply rails, clocking, impedance, isolation, and regulatory circuit requirements. The verified data identifies the part as not recommended for new designs and points users toward the Si3018 datasheet, so lifecycle and sourcing checks are essential. This page combines the verified specifications, sourcing records, and practical constraints without inventing undocumented electrical values.