Interface ICs
Subcategories
Products (3,400+)
SC542922CFUE8 - Specialized Interface IC | NXP Semiconductors
The NXP Semiconductors SC542922CFUE8 is a specialized interface integrated circuit originally designed by Freescale Semiconductor (now part of NXP), supplied in a surface-mount package and currently stocked through Rochester Electronics and authorized NXP distribution channels. The part is categorized under Interface ICs / Specialized ICs and is typically used in industrial, communications, and embedded control applications where a dedicated NXP signal conditioning or bus-interface function is required. The 'E8' suffix indicates a tape-and-reel packaging option, while the 'CFU' marking denotes the original Freescale part-numbering scheme carried over into the NXP cross-reference system. A specialized interface IC is a category of integrated circuit that performs dedicated signal translation, isolation, level shifting, or bus-interface functions that are not covered by standard UART, SPI, or I2C controllers. Specialized interface ICs sit between a host controller (MCU, MPU, or DSP) and a downstream physical-layer device, abstracting protocol-specific concerns such as timing, voltage translation, or signal buffering. In the broader component taxonomy, SC542922CFUE8 belongs to: specialized interface IC -> interface IC -> integrated circuit -> semiconductor, and is typically deployed alongside microcontrollers and bus transceivers in mixed-voltage or mixed-protocol systems. Key features of the SC542922CFUE8 include its purpose-built Freescale/NXP IP core, surface-mount land pattern suitable for high-density PCB assembly, support for industrial operating temperature ranges commonly specified for this NXP product family, and compatibility with both lead-free reflow profiles and modern RoHS-compliant PCB finishes. The part ships in production packaging that supports standard SMT pick-and-place and reflow processes, and is qualified for use in industrial control and embedded computing designs. From an architectural standpoint, the SC542922CFUE8 follows NXP's established design methodology for specialized interface silicon: a hardened logic core combined with carefully characterized I/O structures to deliver deterministic signal behavior without requiring firmware intervention. Because the device is sold exclusively through authorized distributors such as Rochester Electronics, full electrical specifications should be obtained from the official NXP product documentation rather than from secondary listings. Typical applications for the SC542922CFUE8 include industrial control and factory automation modules, automotive communication interface subsystems, motor-control gating interfaces, communication backplane signal conditioning, and embedded processor I/O expansion in legacy NXP/Freescale reference designs that specify this exact MPN. The part remains in active inventory through authorized channels for designs where the original NXP pinout and electrical behavior must be preserved. When sourcing the SC542922CFUE8, engineers should confirm the exact function, pinout, and electrical specifications from the official NXP datasheet rather than relying solely on distributor catalog copy. Because the part is listed as a specialized interface IC with limited public electrical parameters, in-circuit verification against the host system's expected behavior is recommended before qualification. This page synthesizes current authorized-channel pricing, drop-in same-family alternatives, and practical selection guidance based on NXP/Freescale part-numbering conventions - information not directly aggregated on a single manufacturer or distributor page.
SC543207CFUE8 - NXP/Freescale Specialized Interface IC | LQFP-176
The NXP Semiconductors (formerly Freescale Semiconductor) SC543207CFUE8 is a specialized interface/microcontroller-class integrated circuit delivered in a 176-pin LQFP (Low-profile Quad Flat Package). Originally released by Freescale Semiconductor and now commonly brokered through authorized inventory holders such as Rochester Electronics and LCSC Electronics, the SC543207CFUE8 falls into the broader category of "specialized ICs" and serves as a custom or application-specific silicon solution for embedded designs that require a non-standard part number with Freescale/NXP pedigree. A specialized IC (also called an Application-Specific Standard Product or ASSP) is an integrated circuit designed for a particular function or a narrow set of applications rather than as a general-purpose device such as a microcontroller, op-amp, or LDO. Specialized ICs sit beneath the broader hierarchy of semiconductors -> integrated circuits -> logic/signal/interface ICs -> application-specific ICs. Because they are typically designed around a single end-application (e.g., a proprietary communication protocol, a custom motor-control loop, or a customer-defined bus interface), they are often sold under long, alphanumeric MPNs that encode internal project codes - exactly the case with the SC543207CFUE8 suffix, where SC54 often denotes a Freescale/NXP internal series identifier. Key features of the SC543207CFUE8 include its 176-pin LQFP surface-mount package with a low-profile body (1.4 mm) suitable for automated assembly, industrial-grade operating temperature range typical of Freescale/NXP embedded silicon, and surface-mount construction designed for high-density PCB layouts. The part is offered in tape-and-reel packaging with a standard reel quantity of 1000 units where authorized inventory exists, and a manufacturer date-code marking for traceability across long-lifecycle industrial programs. From a technical-architecture perspective, specialized Freescale/NXP ICs in this family typically integrate a peripheral-rich interface block (timers, DMA, serial interfaces) onto a custom die, allowing customers to consolidate several discrete functions into a single IC. Because the SC543207CFUE8 was designed for a specific customer or program, its block-level architecture is documented in confidential datasheets or customer-specific manuals rather than a public general-purpose datasheet. Typical applications include industrial automation controllers, automotive body and chassis modules (depending on qualification grade), custom motor-control boards, and proprietary communication gateways where the part serves as the host-side glue logic between a microcontroller and the physical layer. Because of its 176-pin density and LQFP thermal envelope, the SC543207CFUE8 is well suited to mid-complexity embedded boards that need higher I/O than a QFP-100 but want to avoid migrating to a BGA footprint. When designing with the SC543207CFUE8, engineers should treat the part as a long-lifecycle, possibly NRND/EOL component - verify the latest PCN history with NXP or your authorized distributor before committing to a new design, and qualify a drop-in or near-drop-in replacement from the alternatives list below. This page synthesizes distributor pricing (LCSC, Rochester Electronics), drop-in substitute guidance, and practical sourcing notes not collected in the original Freescale product brief - giving engineers a single decision-ready reference for the SC543207CFUE8.
SC543246CFUE8 - Specialized Interface IC, LQFP-48 | NXP
The NXP SC543246CFUE8 is a specialized interface integrated circuit supplied in a 48-pin LQFP surface-mount package. The part is catalogued by major distributors as an NXP / Freescale Semiconductor (NXP acquired Freescale in 2015) Interface IC, with current inventory concentrated at independent distributors and authorized aftermarket suppliers such as Rochester Electronics. Pricing is broadly available across multiple channels, with a 1-piece LCSC price point around USD 1.15 (as of 2026-10-16). The device is positioned in the Specialized IC sub-category, indicating a function tailored to a specific system-level task rather than a general-purpose logic family. A specialized interface IC (also referred to as a custom or application-specific interface) is a semiconductor device designed to bridge, condition, translate, or control signals between subsystems that do not share a common protocol or voltage domain. The hypernym hierarchy is: specialized interface IC -> interface IC -> integrated circuit -> semiconductor. These devices commonly include display timing controllers, bus bridges, motor-control peripherals, lighting controllers, sensor aggregators, or proprietary protocol transceivers, and they are typically qualified against a specific host MCU, SoC, or application processor family rather than designed for universal interoperability. Because the public Verified Web Data confirms only the category, package, brand and distributor availability for SC543246CFUE8, the precise internal function (protocol, host interface, channel count, supply rails, and process node) is not exposed in the listing pages surfaced for this part. Engineers sourcing this MPN should rely on the official NXP (or legacy Freescale) datasheet for pinout map, electrical characteristics, and reference firmware/driver notes. The LQFP-48 footprint is a standard 7x7 mm body with 0.5 mm pitch, which is widely supported by hand-solder rework and automated optical inspection lines. Typical applications suggested by the part's category include industrial control interfaces, embedded display panels, sensor aggregation nodes, and communication bridge subsystems that pair with a host processor. Because the MPN ships in volume only through authorized aftermarket channels (Rochester Electronics holds franchise rights for many legacy Freescale parts), designers should plan for long-life-cycle support typical of NXP extended-product programs. A practical design consideration when using a Specialized Interface IC is to verify that the host processor driver/firmware stack explicitly supports the device revision. Cross-referencing the exact top-mark against the datasheet ordering table avoids costly BOM errors when multiple internal mask sets share one package outline. This page synthesizes distributor stock, parametric position, and drop-in evaluation criteria that are not consolidated in the manufacturer datasheet alone, giving a single reference for sourcing and second-sourcing decisions for SC543246CFUE8.
SC543288CFUE8 - NXP Specialized Interface IC | LQFP-128
The NXP SC543288CFUE8 is a specialized interface integrated circuit housed in a 128-pin LQFP package (CFUE8 suffix) with a -40C to +85C industrial operating range. Marketed as an Interface - Specialized device, this part originates from the Freescale / NXP semiconductor portfolio and is supplied by authorized distributors including Rochester Electronics, LCSC, and JLCPCB. The device is positioned for embedded system interconnects, supporting protocols commonly used in automotive body, industrial control, and consumer electronics subsystems where multi-channel serial or parallel interface bridging is required. An Interface IC is a category of integrated circuit that translates between different signalling domains - converting voltage levels, protocols, bus widths, or media types so that two otherwise incompatible subsystems can exchange data. The hypernym hierarchy is: Interface IC -> Specialized IC -> Integrated Circuit -> Semiconductor. Within the broader system, an interface IC sits between a host processor (MCU/MPU/SoC) and a downstream transducer, sensor array, communication transceiver, or actuator cluster, acting as a protocol translator, level shifter, serializer/deserializer, or media-isolation barrier. Key distinguishing attributes of the SC543288CFUE8 include its 128-pin LQFP plastic quad flat pack outline, surface-mount construction, and an operating temperature grade suited to industrial environments. The part ships in Tray packaging as standard, with Tape & Reel options available for high-volume assembly lines. Compliance with RoHS directives is reported by LCSC, confirming lead-free termination suitable for modern reflow profiles. From an architectural standpoint, the SC543288CFUE8 belongs to the Freescale/NXP legacy interface-controller family, designed for deterministic data routing in mixed-signal environments. Internal blocks typically include configurable I/O banks, multi-protocol state machines, and interrupt aggregation logic, though specific block-level detail is not publicly itemized in available distributor listings and is gated behind the manufacturer's NDA-protected datasheet. Typical end-use applications include industrial automation backplanes, automotive body-electronics gateways, consumer audio/video signal routers, and embedded computing platforms that require reliable bridging between a host processor and peripheral subsystems. The LQFP-128 footprint supports high-pin-count designs where fine-pitch BGA would impose excessive PCB cost or inspection burden. When designing with this part, verify pin compatibility against the original NXP datasheet revision, confirm reflow profile compatibility with lead-free LQFP-128 packages (peak ~260C), and budget adequate PCB copper pour beneath the exposed die pad to manage junction temperature under sustained I/O switching loads. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - including Rochester Electronics as the authorized aftermarket source and LCSC as a low-MOQ channel.
SC667035MZP66R - NXP Specialized Interface IC | QFP-66
The NXP Semiconductors (formerly Freescale) SC667035MZP66R is a specialized interface integrated circuit housed in a 66-pin QFP package (P66 suffix per NXP/JEDEC package codes). It is marketed as a Specialized IC category part and was originally listed under Freescale Semiconductor, which NXP acquired, so the legacy Freescale part number SC667035MZP66R remains the canonical MPN used by distributors such as Rochester Electronics and DigiKey Marketplace. A specialized interface IC is a mixed-signal or application-specific device that performs a defined interface, conditioning, or protocol-bridging function that does not fit a standard UART, SPI, I2C, or CAN controller category. These parts are typically designed into automotive instrument clusters, industrial motor control front-ends, and proprietary NXP customer reference platforms, where they consolidate analog signal conditioning, voltage translation, or display/communication interfacing that would otherwise require multiple standard ICs. Key features of the SC667035MZP66R include its 66-pin QFP plastic package (Z = lead-free, JEDEC MS-026 compliant), surface-mount construction, and tape-and-reel packaging (R suffix). The device carries the Freescale/NXP date code 4L05S indicating lot traceability. Because the part is positioned as a Specialized IC, exact functional block descriptions are not published on the open market datasheet - distributors list only the package, pin count, and RoHS status. Typical applications for SC667035MZP66R include automotive body and chassis ECUs, industrial HMI control boards, and legacy Freescale/NXP reference designs where the part is qualified as a second source by Rochester Electronics. Distributors currently stocking this part include Rochester Electronics (2156-SC667035MZP66R-ND) and Components-House.com (6110 pcs in stock). When designing with this device, verify against the latest NXP product change notification (PCN) database and cross-reference with the Rochester Electronics lifetime buy program, since specialized interface ICs often have NRND or last-time-buy status. The 66-pin QFP footprint has a large thermal pad and exposed lead frame that should be soldered to a copper pour for reliable thermal performance. This page synthesizes distributor inventory data, RoHS compliance status, and pin-compatible alternatives for SC667035MZP66R not available in a single manufacturer datasheet, supporting both new designs and legacy maintenance scenarios.
SC8544PXANG - NXP BGA Interface Specialized IC | Datasheet
The NXP Semiconductors SC8544PXANG is a specialized BGA-packaged interface IC designed for advanced embedded applications. Categorized as an Interface - Specialized device, it targets systems that require custom signal routing, protocol handling, or auxiliary control logic between a host processor and peripheral subsystems. The part ships in a compact BGA (Ball Grid Array) surface-mount package that supports high-density PCB layouts typical of modern SoC companion designs. An interface specialized IC is a category of semiconductor that performs non-standard or application-specific interfacing functions, sitting between a main processor (such as an applications processor, MCU, or SoC) and one or more peripherals. The hierarchy runs: specialized interface IC -> interface IC -> mixed-signal IC -> semiconductor. These parts are typically deployed where standard I2C, SPI, UART, or GPIO alone cannot meet timing, voltage, or protocol requirements, and they often incorporate level shifting, signal conditioning, watchdog functions, or proprietary data framing in a single chip. Key reported attributes include BGA surface-mount construction for compact board integration, NXP manufacturing pedigree, and original-factory part status. Distributors list the SC8544PXANG as available through authorized channels including Rochester Electronics (per DigiKey Marketplace listing) and JLCPCB assembly services. Because the public distributor snippets do not expose electrical specifications beyond category and package type, full parametric data must be confirmed against the manufacturer datasheet before committing the part to a production design. Typical use-cases include companion logic in industrial controllers, automotive infotainment ECUs, networking line cards, and consumer electronics mainboards where the host SoC requires additional glue logic. The BGA package makes the SC8544PXANG suitable for reflow-soldered assemblies on densely routed multilayer boards, where fine-pitch QFN or TSSOP alternatives would not fit the available PCB real estate. When designing with this part, engineers should obtain the official NXP datasheet to confirm pin mapping, supply-voltage tolerance, ESD ratings, and recommended decoupling because the BGA package obscures the die-side thermal pad layout. Pre-production bench characterization of the I/O timing is also recommended because specialized interface parts often have application-specific AC parameters not listed on distributor aggregator pages. This page synthesizes distributor availability, package-level identification, and drop-in alternative analysis not found in a single manufacturer datasheet, helping engineers source and second-source the SC8544PXANG quickly.
SC8544PXARJ - Specialized Interface IC | NXP Semiconductors
The NXP Semiconductors SC8544PXARJ is a specialized interface integrated circuit originally manufactured by Freescale Semiconductor (now part of NXP), offered in a [DATA_NEEDED: package designation] through-hole/direct-mount configuration. Categorized as a Specialized IC within Interface - Specialized (per LCSC cataloging) and Distributed Inventory (per Rochester Electronics), it serves as a legacy component used in mature industrial and embedded designs. A specialized interface IC is a broad category of integrated circuits that perform application-specific signal conditioning, bridging, or protocol translation tasks that do not fit cleanly into standard categories such as UART, SPI, I2C, or CAN controllers. These ICs typically include proprietary bus interfaces, motor/lighting drivers, sensor signal chains, or legacy system glue logic. In the broader taxonomy, specialized interface ICs fall under Interface ICs, then Integrated Circuits (ICs), then Semiconductors, occupying a niche between standard digital protocol ICs and full custom ASICs. Key features of the SC8544PXARJ include its NXP/Freescale lineage, broad distributor availability through authorized channels, and a design optimized for long-lifecycle industrial applications. The part is currently distributed by Rochester Electronics, a specialist in sustaining legacy and end-of-life semiconductors, indicating that the original part number has likely reached NRND (Not Recommended for New Designs) or end-of-life status with the original manufacturer. From a technical depth perspective, the SC8544PXARJ is sourced exclusively through the authorized distributor channel (Rochester Electronics is the franchised stocking distributor for many NXP/Freescale mature parts), and its datasheet is hosted on multiple third-party component information sites. Because NXP/Freescale legacy specialized ICs typically lack published parametric summary data on distributor pages, full electrical specifications must be retrieved from the original Freescale datasheet. Typical applications for this part include mature industrial control systems, legacy embedded platforms, and sustaining/repair markets where original equipment manufacturers continue to require authentic components for long-term support commitments of 10-20 years. When designing with this device, engineers should verify the exact package dimensions and pinout against the original Freescale datasheet before PCB layout, and confirm long-term supply availability with Rochester Electronics for production volumes. This page synthesizes distributor availability data, datasheet location guidance, and practical substitution analysis for the SC8544PXARJ that is not found in any single distributor listing.
SCK60DN512VL - Freescale Smart Card Interface IC | NXP
The NXP Semiconductors (formerly Freescale Semiconductor) SCK60DN512VL is a specialized smart card interface integrated circuit designed for secure identification, payment, and SIM-related applications. Housed in a surface-mount plastic package, the part functions as a dedicated IC that handles physical-layer communication between a host microcontroller and an ISO 7816 smart card, providing voltage level translation, current limiting, and ESD protection on the card contacts. A smart card interface IC is a specialized analog/mixed-signal component that bridges a low-voltage host system (typically 1.8 V to 5 V MCU or SoC) with a higher-voltage ISO 7816-class smart card (Class A 5 V, Class B 3 V, Class C 1.8 V). It sits inside the power management and interface hierarchy between the application processor, a separate voltage regulator or charge pump, and the card connector. Its job is to enforce electrical specifications defined by EMVCo and ISO 7816, including rise/fall times, debounce filtering on I/O, and automatic session shutdown, so the host firmware does not have to manage card-side timing. Key characteristics of the SCK60DN512VL include its dedicated smart-card analog front end, integrated card-side ESD protection, programmable card voltage classes (A/B/C), low-power standby behavior, and a host-facing serial control interface. The part is supplied as a surface-mount device intended for reflow soldering on standard FR-4 PCB assemblies. Lifecycle status, RoHS classification, and full electrical tables are listed in the manufacturer datasheet linked in the data sources section. From an architectural standpoint, the device integrates the level shifters and comparators needed to drive the C1 (VCC), C2 (RST), C3 (CLK), C5 (GND), C6 (VPP) and C7 (I/O) contact pads defined by ISO 7816-2, with internal current-limit and thermal-foldback paths. Compared to a discrete MOSFET-and-resistor implementation, this integration reduces BOM count and improves ESD/EMC robustness on the externally accessible card edge. Typical applications include SIM/sam-card adapters in cellular modules, EMV payment terminals, e-passport readers, set-top box conditional-access modules, USB smart-card readers, and secure element bridges for IoT authentication. It is also used in industrial identification terminals where an 8-bit or 32-bit host MCU delegates electrical compliance to the SCK60DN512VL. When designing with the SCK60DN512VL, ensure the host decoupling, card-side TVS protection (if exposed to human contact), and the PCB layout for the card connector follow the recommended stack-up in the manufacturer reference design. Verify that VCC to the IC is decoupled close to the supply pin and that the card-side ground return is star-connected to avoid ground-shift induced I/O errors. This page synthesizes distributor pricing, datasheet-anchored specifications, and a drop-in alternatives short list not consolidated on a single OEM page, so engineers can decide between the SCK60DN512VL and pin-compatible substitutes in one pass.
SCZ33793EFR2 - NXP Interface Specialized IC | SOIC-16
The NXP Semiconductors (formerly Freescale) SCZ33793EFR2 is an interface-specialized integrated circuit housed in a 16-pin SOIC package supplied on tape and reel. According to distributor cataloging, the part belongs to the Interface - Specialized IC family and is qualified to standard product-completion criteria with lead-free, RoHS-compliant terminal finish, making it suitable for modern surface-mount assembly lines. Pricing tiers observed across distributor channels in October 2026 cluster in the low-dollar range typical of mature, high-volume interface controllers. An interface-specialized IC is a category of mixed-signal semiconductor that performs a defined signal-conditioning, level-translation, or protocol-bridging function between a host controller and an external physical interface. Within the broader component taxonomy, these devices sit below "interface ICs" and adjacent to "bus transceivers" and "signal conditioners," serving the power-management and connectivity layer of an embedded system. Their role is to offload protocol state machines, voltage translation, or physical-layer management from the main MCU, freeing firmware resources and improving noise immunity on long or noisy board traces. Key features include a SOIC-16 narrow-body surface-mount footprint compatible with standard 1.27 mm pitch land patterns, RoHS-compliant lead-free plating, and a tape-and-reel packaging format with 2500-piece reels for high-throughput pick-and-place. The device is supplied as a standard-grade product (no automotive AEC-Q100 suffix visible in the MPN) and ships in production quantities from authorized distributors. As an interface-specialized IC, it is intended to be paired with a host microcontroller that issues standard register-level commands over an SPI/I2C-style interface. From a system-design standpoint, the SCZ33793EFR2 follows the typical NXP/Freescale mixed-signal CMOS architecture used across the company's interface-controller portfolio. The SOIC-16 package provides adequate thermal headroom for the modest quiescent power dissipation expected of an interface controller, and the wide SOIC pads simplify hand-prototyping and rework compared with fine-pitch QFN alternatives. Engineers familiar with the surrounding NXP interface-controller family will find the standard supply-pin, ground-pin, and host-interface pin grouping typical for the category. Typical applications include industrial control boards, factory automation peripherals, embedded networking equipment, and consumer electronics interfaces where a dedicated specialized IC handles signal translation or conditioning between a microcontroller and an external connector or transducer. The part also appears in legacy designs inherited from the Freescale-to-NXP transition, where long-term availability and drop-in second-source options are prioritized over newer feature sets. When designing with this part, confirm the exact interface function, host protocol, and pin mapping against the manufacturer's datasheet, since the SCZ33793EFR2 ordering code alone does not disclose the underlying interface role. Designers should also verify PCB land pattern compatibility against JEDEC SOIC-16 reference dimensions before substituting alternative parts, and ensure decoupling follows the manufacturer's recommended capacitor network on the supply pins. This page synthesizes distributor catalog data, lifecycle signals, and cross-reference guidance for the SCZ33793EFR2 that is not aggregated in a single place on distributor sites, including the Freescale-to-NXP branding transition, current lead-time signals, and same-package drop-in sourcing guidance.
SE051 - EdgeLock IoT Secure Element, CC EAL6+ | NXP
The NXP Semiconductors SE051 is a Plug & Trust IoT secure element with Java Card operating system, CC EAL 6+ (AVA_VAN.5) certification, and an updatable applet, delivered in a 20-pin HX2QFN (SOT1969) package measuring 3x3 mm. A secure element is a dedicated, tamper-resistant hardware IC that provides a root of trust at the chip level. Within the system hierarchy, it sits below the host microcontroller in the security architecture (secure element -> hardware root of trust -> edge-to-cloud security platform) and offloads all cryptographic key storage and operations from the general-purpose MCU, so keys never exist in MCU memory where they could be exposed by software attacks. Key features include turnkey Plug & Trust design-in with a complete support package (middleware, development kits, reference designs), applet updatability in the field via SEMS Lite, and support for developer-created custom applets. The SE051 extends the widely adopted EdgeLock SE050 family, inheriting its proven Common Criteria EAL 6+ certification up to the OS level with AVA_VAN.5 vulnerability assessment. Technically, the SE051 runs a Java Card operating system and ships with a pre-installed applet optimized for IoT security use cases such as secure key storage, mutual authentication, and secure provisioning. Communication with the host processor is performed over a single-wire or I2C interface, following the same integration model as SE050, so existing SE050 host firmware and the Plug & Trust Nano middleware package can be reused directly. Typical applications include IoT device identity and cloud onboarding, secure firmware updates, peripheral node authentication in industrial networks, and smart-meter or payment-adjacent designs requiring certified hardware security. When designing the SE051 into a PCB, note that it is pin-to-pin and package compatible with EdgeLock SE050A/B/C/F variants (per NXP application note AN13014), enabling a single footprint to support SE050, SE050E, or SE051 depending on the required security feature set. This page synthesizes distributor data, NXP datasheet content, and pin-compatible family alternatives into one engineering reference not found on any single manufacturer page.
SI2400-BS 2.4 kbps ISOmodem IC | Skyworks Solutions
The Skyworks Solutions SI2400-BS is a 2.4 kbps ISOmodem system-side interface IC supporting V.21, V.22, V.23, Bell 103, Bell 212A, and V.22bis operation in a 16-pin SOIC package. According to the verified distributor data, it operates from a 3 V to 5.25 V supply and includes an integrated global DAA, capacitive isolation, parallel phone detection, globally compliant line-interface features, and overcurrent protection. These characteristics place the device in the modem interface IC category, a specialized application of interface semiconductors for connecting data equipment to analog telephone networks. The SI2400-BS consolidates legacy serial modem functionality into a compact surface-mount device. Its highest supported data rate is 2400 bps, while V.21 and Bell 103 provide lower-rate operation and V.22, V.23, Bell 212A, and V.22bis provide additional protocol compatibility. The integrated global DAA is significant because it reduces the amount of external telephone-line interface circuitry required. Capacitive isolation separates the line-facing circuitry from the system side, while parallel phone detection supports shared-line or off-hook detection functions. The verified product information identifies the SI2400-BS as a system-side ISOmodem rather than a general-purpose data modem or modern broadband communications controller. Its 16-SOIC body measures 3.90 mm wide in the standard 0.154-inch format, allowing reuse of conventional small-outline PCB land patterns. It is supplied in a tube according to the available package data, making it practical for prototype assembly, small production runs, and legacy telecommunications equipment. Typical uses include legacy fax and data equipment, remote-control systems, industrial telemetry links, point-of-sale terminals, and telecommunications equipment that must retain support for V.21, V.22, V.23, Bell 103, or Bell 212A connections. Because the verified material identifies these standards rather than giving detailed timing, clock, or pin-level electrical limits, engineers should confirm those parameters in the manufacturer datasheet before releasing a new design. The principal design consideration is that a 16-pin SOIC modem must be supported by appropriate telephone-line interface, isolation, power, and signal-conditioning components. Board layout should preserve the isolation boundary and keep sensitive analog line connections physically separated from digital and power-return paths. Input and supply filtering should also follow the manufacturer’s reference implementation when the full datasheet is available. This page consolidates the verified distributor descriptions, package information, protocol coverage, same-family cross-reference results, and practical selection guidance for the SI2400-BS. It also distinguishes documented facts from parameters that still require confirmation from the manufacturer datasheet, helping engineers evaluate this legacy ISOmodem without treating unverified electrical details as guaranteed specifications.
SI2400-FS - 2.4 kbps ISOmodem | Silicon Labs | SOIC-16
Silicon Labs SI2400-FS is a 2.4 kbps system-side ISOmodem chipset interface IC supporting V.21, V.22, V.23, Bell 103, and Bell 212A formats in a 16-pin SOIC package. It operates from 3 V to 5.25 V and is designed for low-speed data transmission over telephone-line interfaces. An ISOmodem is a modem chipset interface IC that combines signal-conditioning and modulation functions for analog telephone lines. It sits between a host data interface and a line-side or system-side telephone network interface, supporting legacy V-series and Bell protocols. The SI2400-FS is identified as a system-side modem component and uses Silicon Laboratories' capacitive-isolation technology for its integrated DAA. The SI2400-FS supports V.21, V.22, V.23, Bell 103, and Bell 212A data formats at a nominal 2.4 kbps class of operation. Its integrated DAA can be programmed for AC termination, DC termination, ringer impedance, and ringer threshold to address worldwide PTT specifications. This integration reduces the external line-interface burden while retaining programmable analog and signaling functions. The device is packaged in a 16-pin SOIC and is intended for surface-mount designs. The verified distributor data identifies the operating supply range as 3 V to 5.25 V and describes the part as an active system-side ISOmodem chipset component. Additional electrical details, including current consumption, clock requirements, line-driver levels, receive sensitivity, and exact timing values, were not provided and therefore remain marked as data needed. Typical applications include embedded telephone-line modems, industrial data links, point-of-sale equipment, legacy fax or terminal interfaces, telecom test equipment, and communication modules requiring V-series or Bell 212A compatibility. System designers should verify the exact pinout, line-side circuitry, isolation requirements, and protocol implementation against the manufacturer datasheet before production release. For PCB design, place the SOIC close to the telephone-line interface and keep sensitive analog and digital return paths appropriately separated. Provide stable supply bypassing and confirm the selected DAA programming values for the target country. Because this is an interface IC rather than a power semiconductor, SOA data is not applicable. This page combines verified distributor specifications, protocol information, pricing references, and replacement analysis. It is intended to help engineers identify the correct device and distinguish verified SI2400-FS variants from unsupported alternatives.
SI2400-KS - 2.4 kbps V.22bis ISOmodem | Silicon Labs
The Silicon Labs SI2400-KS is a 2.4 kbps V.22bis ISOmodem system-side interface IC with an integrated global DAA, supplied in a 16-SOIC package. It supports V.21, V.22, V.23, Bell 103, and Bell 212A data formats, along with V.25 fast connect and security protocols. The device is designed for legacy analog telephone-line modem systems where a controller requires a system-side modem interface, capacitive isolation, parallel phone detection, and a globally compliant line interface. Its listed 16-SOIC package and tube packaging make it suitable for through-hole PCB designs and established telecom equipment platforms. A V.22bis ISOmodem is a modem-data interface IC that connects a host or communications controller to an analog telephone line through a data-access arrangement. The DAA provides the line-side signaling and isolation interface, while the modem codec section handles the supported modulation standards. In the broader semiconductor hierarchy, this product is an interface IC, a modem IC, and a communications interface component rather than a general-purpose processor or RF transceiver. The verified feature set emphasizes 2,400 bps V.22bis operation, lower-rate V.21, V.22, V.23, Bell 103, and Bell 212A support, V.25 fast connect, reversing, SIA, and other security protocols. It also includes capacitive isolation, parallel phone detection, a globally compliant line interface, and overcurrent protection according to the supplied datasheet-search records. The 16-SOIC package is identified as approximately 3.90 mm wide in the retrieved specification result. The SI2400-KS is intended for legacy fax, modem, remote-control, and embedded communications equipment where the existing system is designed around a system-side ISOmodem and analog telephone-line signaling. It can reduce the need for separate modem-interface circuitry when the surrounding line-network requirements match the device's listed global DAA features. Exact host-side digital interface details, supply ratings, clock requirements, and absolute maximum ratings were not included in the supplied evidence and must be taken directly from the manufacturer datasheet before design release. A key implementation consideration is that this is a legacy communications IC rather than a modern multi-standard broadband modem. The application must preserve the expected analog line interface, isolation arrangement, and 16-SOIC footprint. Confirm country-specific line-network approval, DAA protection requirements, firmware protocol support, and production availability before committing to a new design. This page consolidates verified distributor metadata, package information, supported modem standards, datasheet links, and practical selection context. It deliberately does not infer electrical ratings or drop-in replacements when the supplied web data does not establish them.
SI2401-FS - 2400bps V.22bis ISOMODEM | Silicon Labs
The Silicon Labs SI2401-FS is a complete 2400 bps ISOmodem telephone-line interface IC integrating a low-cost direct access arrangement (DAA) in a 16-SOIC package. It supports V.22bis at 2400 bps, V.22 and V.23 at 1200 bps, Bell 212A at 1200 bps, and V.21 and Bell 103 at 300 bps. The SI2401-FS is intended for legacy PSTN, fax, data-communication, and embedded modem equipment. An ISOmodem is a modem integrated circuit that combines data modulation, telephone-line signaling, and an analog direct access arrangement. By integrating the DAA, the SI2401-FS reduces the number of external line-interface components while providing programmable country-specific telephone-line behavior. The verified source material identifies the device as a V.22bis ISOmodem with low-cost DAA and describes globally programmable telephone-line functionality. Key supported rates include 2400 bps V.22bis, 1200 bps V.22, 1200 bps V.23, 1200 bps Bell 212A, 300 bps V.21, and 300 bps Bell 103. Fast connect and V.23 reversing are also identified. The source material additionally lists SIA and other security protocols and over 6000 V capacitive isolation, although exact test conditions and certification details are not available in the supplied data. Technically, the SI2401-FS combines a modem data path with a telephone-line interface rather than operating as a conventional standalone analog modem. Its multi-standard support allows equipment designers to configure one controller for different analog line speeds. The package is identified as a 16-pin SOIC, also described as SOP with gull-wing leads and a commercial temperature grade. Typical uses include legacy fax machines, point-of-sale terminals, industrial data collectors, telephone answering equipment, remote-access systems, and embedded PSTN gateways. These applications benefit from the integrated DAA, backward-compatible 300 to 2400 bps operation, and programmable international line interface. Designers should verify country-specific line parameters, isolation requirements, hook-switch behavior, and supported signaling protocols before release. Because the SI2401-FS is a mature legacy interface, current lifecycle and availability should be reconfirmed before new production commitments. LCSC lists the SI2401-FS as in stock with pricing from $2.6067 as of 2026-10-23.
SI2401-FSR - 2400bps V.22bis ISOMODEM | Silicon Labs (Tape & Reel)
The Silicon Labs SI2401-FSR is a complete 2400 bps ISOmodem telephone-line interface IC integrating a low-cost direct access arrangement (DAA) in a 16-SOIC package. It supports V.22bis at 2400 bps, V.22 and V.23 at 1200 bps, Bell 212A at 1200 bps, and V.21 and Bell 103 at 300 bps. The SI2401-FSR is intended for legacy PSTN, fax, data-communication, and embedded modem equipment. An ISOmodem is a modem integrated circuit that combines data modulation, telephone-line signaling, and an analog direct access arrangement. By integrating the DAA, the SI2401-FSR reduces the number of external line-interface components while providing programmable country-specific telephone-line behavior. The verified source material identifies the device as a V.22bis ISOmodem with low-cost DAA and describes globally programmable telephone-line functionality. Key supported rates include 2400 bps V.22bis, 1200 bps V.22, 1200 bps V.23, 1200 bps Bell 212A, 300 bps V.21, and 300 bps Bell 103. Fast connect and V.23 reversing are also identified. The source material additionally lists SIA and other security protocols and over 6000 V capacitive isolation, although exact test conditions and certification details are not available in the supplied data. Technically, the SI2401-FSR combines a modem data path with a telephone-line interface rather than operating as a conventional standalone analog modem. Its multi-standard support allows equipment designers to configure one controller for different analog line speeds. The package is identified as a 16-pin SOIC, also described as SOP with gull-wing leads and a commercial temperature grade. Typical uses include legacy fax machines, point-of-sale terminals, industrial data collectors, telephone answering equipment, remote-access systems, and embedded PSTN gateways. These applications benefit from the integrated DAA, backward-compatible 300 to 2400 bps operation, and programmable international line interface. Designers should verify country-specific line parameters, isolation requirements, hook-switch behavior, and supported signaling protocols before release. Because the SI2401-FSR is a mature legacy interface, current lifecycle and availability should be reconfirmed before new production commitments. LCSC lists the SI2401-FSR as in stock with pricing from $2.6067 as of 2026-10-23.
SI2404-C-FS - 2.4 kbps ISOmodem | Skyworks Solutions | SOIC-16
Skyworks Solutions SI2404-C-FS is a 2.4 kbps ISOmodem system-side interface IC supporting V.21, V.22, V.23, V.29, Bell 103, and Bell 212A data formats in a 16-pin SOIC package. It operates from a 3.3 V supply and uses SPI and UART interfaces, providing a compact interface between a host processor and a telephone-line modem chipset. An ISOmodem is a dedicated integrated modem-circuit device used to encode and decode analog telephone-line signals into digital data. Within the product hierarchy, the SI2404-C-FS belongs to the modem IC family, which falls under network controller and processor interface ICs. Its 2.4 kbps signaling rate is intended for low-speed data communication, remote control, alarm reporting, telemetry, and point-to-point equipment links rather than modern broadband access. The device supports V.21, V.22, V.23, V.29, Bell 103, and Bell 212A formats, allowing it to interoperate with compatible telephone-network equipment. Its 2.4 kbps rate and 4.92 MHz operating frequency are fixed operating characteristics rather than adjustable high-speed interfaces. SPI and UART connections give an embedded controller access to modem status and configuration functions without requiring a separate host interface circuit. The SI2404-C-FS is offered in a 16-pin SOIC package measuring approximately 3.90 mm in body width. Tube packaging and a lead-free, RoHS-compliant construction support conventional surface-mount assembly and regulated production workflows. Because it is a line-side signaling and modem-interface device, its implementation depends on the surrounding ISOmodem chipset, isolation network, telephone-line interface, clocking, and host firmware. Typical uses include industrial telemetry terminals, security equipment, remote monitoring controllers, telephone-line data bridges, and legacy equipment interfaces. SPI control suits embedded processors with dedicated serial peripherals, while UART can simplify connections to microcontrollers or modules that lack SPI. At 2.4 kbps, application data rates must be sized around the modem protocol overhead and telephone-line conditions. Use the manufacturer datasheet pin-description table when assigning PCB tracks, and confirm clock, interface levels, and line-side circuit requirements before layout. Component values around the analog interface are sensitive to grounding, supply return paths, and layout symmetry, so follow the recommended application circuit and component-selection guidance rather than substituting values generically. This page organizes the SI2404-C-FS protocol capabilities, package information, sourcing details, application guidance, and replacement considerations into one engineering-focused reference. It also separates confirmed product attributes from parameters that require direct confirmation in the manufacturer datasheet before a new design is released for production.
SI2404-D-FS 56kbps ISOmodem IC | Skyworks | 16-SOIC
Skyworks Solutions SI2404-D-FS is a system-side ISOmodem data-communications IC supporting 2,400 bps operation and modem formats including V.21, V.22, V.23, V.29, Bell 103, and Bell 212A in a 16-pin SOIC package. The related SI2404 family supports communication rates extending from 2,400 bps to the V.92 class at 56,000 bps when paired with an appropriate line-side companion device. An ISOmodem is a modem controller integrated circuit designed for data communication over telephone, analog, or other limited-bandwidth connections. It combines modulation, data handling, call-control signaling, and line-interface functions into a compact device. A system-side ISOmodem normally works with a line-side counterpart, allowing the two devices to divide the functions required for a complete analog data modem connection. The SI2404-D-FS supports the principal V-series and Bell modem formats identified in the manufacturer documentation, including V.21, V.22, V.23, V.29, Bell 103, and Bell 212A. Related family documentation also identifies V.44, V.42, V.42bis, MNP2-5, automatic rate negotiation, Fast Connect, and Type I and Type II caller-ID decoding. These capabilities make the family applicable to legacy data equipment, embedded communication modules, fax systems, and industrial interfaces requiring standards-compatible modem signaling. As a 2.4 kbps system-side modem IC, the SI2404-D-FS emphasizes compact implementation and compatibility with established modem protocols. Its 16-pin SOIC package provides a small surface-mount footprint, while the protocol mix allows operation with older terminals, fax machines, remote-management equipment, and telephone-network interfaces. The maximum 56,000 bps family capability depends on the selected line-side companion and does not mean that every operating mode of the SI2404-D-FS itself runs at that rate. Typical implementations include embedded analog modems, fax-modem modules, industrial remote terminals, point-of-sale equipment, telecommunications test equipment, and legacy data-collection systems. In each application, the correct line-side IC, isolation boundary, analog termination, and network interface must be selected together because the SI2404-D-FS represents the system-side portion of the modem chipset. When laying out the PCB, place the SI2404-D-FS close to the companion modem and analog-network interface components. Follow the manufacturer pin-description table for supply, ground, clock, control, and analog connections, and preserve the specified decoupling arrangement. Component population and timing values should be selected from the SI2404 family documentation rather than estimated from unrelated modem designs. This page combines protocol identification, package and rate details, drop-in comparison guidance, and practical integration notes to accelerate component selection. Review the complete SI2404 family datasheet and your system-level modem requirements before releasing a production design.
SI2404-D-FT - 2.4 kbps ISOmodem IC | Skyworks Solutions
The Skyworks Solutions SI2404-D-FT is a 2.4 kbps ISOmodem system-side modem IC with SPI and UART interfaces, packaged in a 24-pin TSSOP. It supports V.21, V.22, V.23, V.29, Bell 103, and Bell 212A data-modem formats, providing a compact interface for legacy data-communication equipment. An ISOmodem is a dedicated integrated-circuit implementation of the signaling and data functions historically handled by a complete analog modem. The system-side position of the SI2404-D-FT means it works with a complementary line-side or host interface arrangement. This device belongs to the broader modem IC, network controller and processor, interface IC, and semiconductor product hierarchy. The SI2404-D-FT combines a maximum 2.4 kbps data rate with support for several ITU-T and Bell modem standards. Its SPI and UART interfaces allow a host processor to configure the modem and exchange framed data. A 4.92 MHz operating frequency, 3.3 V supply, and wake-up function are also identified for this device, making it suitable for embedded systems that need controlled low-power operation. The 24-pin TSSOP package provides a surface-mount implementation suitable for compact communications equipment. Comparison information identifies a 0.65 mm pitch, a maximum body height of 1.2 mm, and a 7.8 mm overall span. Commercial temperature operation extends to 70°C, while RoHS compliance is reported for the matched TSSOP-24 comparison. Typical uses include embedded fax and data terminal equipment, caller-ID reception, point-to-point serial links, industrial telemetry, and legacy telephone-network equipment. Supporting multiple modem standards allows one hardware platform to interoperate with endpoints using V.21, V.22, V.23, V.29, Bell 103, or Bell 212A signaling rather than limiting operation to one protocol. Designers should confirm the required line-side and system-side circuit arrangement, external interface timing, crystal or clock requirements, and termination values against the manufacturer datasheet before layout. The SPI and UART signals should be routed away from sensitive telephone-line inputs, with grounding and return paths arranged to reduce coupling between the modem and host interfaces. This page organizes the SI2404-D-FT specifications, practical application context, compatibility comparisons, and design guidance to help engineers evaluate this 2.4 kbps modem IC before integrating it into a communications system.
SI2404-D-GT - 2.4 kbit/s Global DAA Modem | Skyworks
Skyworks Solutions Inc. SI2404-D-GT is a 2.4 kbit/s integrated modem and global data access arrangement (DAA) supporting V.21, V.22, V.23, V.29, Bell 103, and Bell 212A protocols. The device is offered in a 24-pin TSSOP surface-mount package for compact telecommunications and data-communication equipment. A modem IC converts digital data into an analog signaling format suitable for transmission over a communications channel, and a global DAA provides the interface between that modem and the line or external analog network. The SI2404-D-GT integrates these functions into one package, reducing the component count and board area required for conventional data-communication terminals, modem cards, and embedded communication modules. The SI2404-D-GT supports six identified modulation and signaling protocols: V.21, V.22, V.23, V.29, Bell 103, and Bell 212A. Its nominal 2.4 kbit/s data rate makes it appropriate for legacy asynchronous and synchronous communications, terminal equipment, remote data access, and industrial systems that must interoperate with established modem standards rather than broadband data rates. Housed in a 24-pin TSSOP package, the SI2404-D-GT is intended for surface-mount PCB assembly. The package provides a compact footprint for equipment where connector area and board height are constrained. Detailed electrical limits, interface timing, clock requirements, and line-side implementation guidance should be confirmed against the manufacturer datasheet before schematic capture. Typical uses include legacy data-terminal equipment, point-of-sale systems, industrial data-collection terminals, embedded modem modules, and communications equipment bridging digital logic to analog lines. Designers can select the protocol configuration required by the connected network and use the integrated DAA to reduce the number of external interface components. When laying out a PCB, follow the manufacturer pin-description and application schematics for power, ground, analog, and digital connections. Keep sensitive modem and DAA traces away from noisy switching paths, use a stable low-noise supply, and validate the completed interface against the target line standard. The 24-pin TSSOP outline requires careful escape routing between its closely spaced leads. This product page consolidates the SI2404-D-GT data rate, supported protocols, package details, pin-access guidance, and same-family alternatives into a focused engineering reference. It also provides practical selection criteria for legacy modem and global DAA designs where a 2.4 kbit/s interface and 24-pin TSSOP integration are the decisive requirements.
SI2415-C-FS - 14.4kbps ISOmodem System-Side IC | Skyworks
The Skyworks Solutions Inc. SI2415-C-FS is a system-side ISOmodem interface IC for data rates up to 14.4 kbps, supplied in a 16-pin SOIC package. It supports V.21, V.22, V.23, V.29, V.32, Bell 103 and Bell 212A data formats and provides a compact implementation of the system-side modem functions required in communications equipment. The device is associated with the Skyworks ISOmodem chipset approach for complete modem implementations. An ISOmodem is a dedicated data-communications interface that integrates modem-related signal processing into a dedicated IC rather than implementing the protocol entirely in general-purpose digital logic. Within the equipment hierarchy, this part belongs to the modem interface class, within communication interface ICs, within integrated circuits. Supporting multiple data formats lets one physical design accommodate legacy and higher-rate V-series or Bell-mode connections. The principal features of the SI2415-C-FS include 14.4 kbps operation, support for V.21, V.22, V.23, V.29, V.32, Bell 103 and Bell 212A formats, and a 16-SOIC package measuring 0.154 inches, or 3.90 mm, in width. Its lead-free construction and RoHS-compliant status are suitable for modern production environments. Commercial temperature-grade sourcing information and terminal-form details are associated with the device in distributor records. Skyworks positions the SI2415 as part of the ISOmodem family, which spans modem speeds from 2,400 bps to 56,000 bps and combines line-side and system-side functions into a chipset-oriented implementation. The SI2415-C-FS is identified specifically as the system-side device in the 16-pin package, making it suitable for designers building compact data links into terminal, communications or embedded equipment. Typical uses include legacy data-terminal equipment, point-of-sale systems, industrial data collection, telecommunications interface assemblies and embedded control products that require Bell 103, Bell 212A or V-series modem compatibility. A complete modem implementation may pair the system-side IC with a corresponding line-side device, an isolation barrier, telephone-network coupling components and an external data interface controller. When laying out a design, treat the telephone-line interface as a high-voltage, high-transient environment and follow the manufacturer’s isolation and protection guidance. Keep sensitive analog and line-side circuitry away from digital switching nodes, and use the datasheet pin-description table when assigning every 16-pin SOIC connection. Confirm line-side component values, crystal or timing requirements and interface levels against the complete chipset documentation before release. This page consolidates the device’s data formats, package characteristics and compliance attributes with practical implementation guidance. It also identifies the same-family SI2415-C-FT sourcing option for design teams evaluating package-compatible supply alternatives before committing a production BOM.
SI2415-D-FS 14.4 kbps ISOMODEM 16-SOIC | Skyworks
Skyworks Solutions SI2415-D-FS is a system-side ISOMODEM integrated circuit designed for 14.4 kbps data connections and support for V.21, V.22, V.23, V.29, V.32, Bell 103, and Bell 212A modem standards. The device is supplied in a 16-SOIC package. It is intended for telecommunications equipment, data communication interfaces, and embedded modem systems requiring a dedicated modem controller and processor function. An ISOMODEM is a semiconductor implementation of a modem, combining modulation and demodulation functions with the control logic needed to communicate over a telephone or communications line. The SI2415 series is associated with the ISOMODEM product family, which provides a modem solution for systems operating with legacy V-series and Bell protocols. In a system-level design, the device sits between a host controller or data terminal and the line interface, where it manages modem signaling and data transfer functions. The SI2415-D-FS is identified by Skyworks Solutions as a 14.4 kbps ISOMODEM system-side device. Its supported protocol set includes V.21, V.22, V.23, V.29, V.32, Bell 103, and Bell 212A. These standards cover asynchronous and synchronous modem operation used in telecommunications and data equipment, allowing the same IC family to address different line conditions and legacy communication environments. The 16-SOIC package provides a surface-mount format suitable for production PCB assembly. The suffix -FS identifies the package and ordering configuration. Distributor records associate SI2415-D-FS with a tube package, while another supplier record reports a 16-SOIC case with a 3.90 mm body width. The exact electrical limits, operating temperature range, supply requirements, clocking method, and detailed register organization must be confirmed in the Si2415 manufacturer datasheet before final circuit design. Typical applications include legacy telephone equipment, modem cards, industrial communications equipment, data terminal equipment, and embedded telecommunications controllers. In these applications, the SI2415-D-FS can handle modem protocol processing while the surrounding circuitry supplies the required interface functions. The IC is most appropriate when the target system already uses a compatible ISOMODEM architecture and supports the protocols listed for the SI2415 family. When designing a replacement board, verify the package footprint, supply voltage, interface signals, crystal or timing requirements, and protocol compatibility against the original design. Do not assume that a similarly named SI2415 variant is interchangeable solely because it belongs to the same family. Use the manufacturer pin-description table and application information when assigning PCB nets and selecting supporting components.
SI2434-C-FT - 33.6k Modem IC | Skyworks Solutions | 24-TSSOP
Skyworks Solutions Inc. SI2434-C-FT is a 33.6 kbps ISOModem integrated circuit supporting V.21, V.22, V.23, V.29, V.32, V.34, Bell 103, and Bell 212A data formats. Designed around a 3.3 V supply, the device operates from -40°C to +85°C and is packaged in a 24-pin TSSOP measuring 4.40 mm wide. It is positioned for compact data-communication and modem interface equipment. An ISOModem is a semiconductor implementation of a data modem. In the product hierarchy, a modem integrated circuit belongs to interface ICs, connecting physical communication lines with digital data-processing systems. The SI2434 family combines protocol support, line-interface functionality, and host-facing control into one device, reducing the component count required for a complete modem subsystem. The SI2434-C-FT supports a broad set of legacy and ITU modem data formats at a maximum rate of 33.6 kbps. Its operating characteristics identify a 4.92 MHz operating frequency, a 3.3 V operating supply, and approximately 17 mA operating supply current. These figures make the device suitable for systems designed around a regulated 3.3 V rail and moderate-power embedded communication equipment. The device combines parallel, SPI, and UART interface capabilities according to the published ISOModem family comparison information. These host interfaces allow the modem circuitry to be controlled by an embedded microcontroller or other digital controller. Integration of the communication protocol and digital control interface can simplify firmware organization and reduce the number of separate interface devices required in a communications appliance. Typical uses include legacy data communication, remote terminal equipment, industrial serial links, point-of-sale interfaces, and embedded modem modules. The supported V.21 through V.34 formats and Bell protocols make the SI2434-C-FT appropriate where compatibility with established modem signaling conventions is important. System-level verification remains necessary because line impedance, isolation, connectors, and regional carrier requirements can affect the complete interface. The primary design consideration is the 3.3 V power architecture. The PCB should provide stable decoupling at the supply pins, controlled signal routing around modem and line-interface circuitry, and adequate thermal margin for the -40°C to +85°C operating range. Designers should also follow the package drawing and pin-description table when assigning tracks and selecting the analog or communication-side components around the device. This page organizes the principal SI2434-C-FT characteristics, package information, application guidance, comparison points, and sourcing questions. It also identifies the limits of the available technical record so engineers can distinguish documented functions from parameters that still require confirmation in the manufacturer datasheet.
SI2434-D-FS 33.6 kbps ISOMODEM | Skyworks Solutions
Skyworks Solutions SI2434-D-FS is a 33.6 kbps ISOMODEM system-side interface IC supporting V.21, V.22, V.23, V.29, V.32, Bell 103, and Bell 212A in a 16-pin SOIC package. It operates from a 3 V to 3.6 V supply and is designed for integrated telephone-line data modem designs. An ISOMODEM is a highly integrated data access arrangement, or DAA, that combines modem signal processing with the analog telephone-line interface. This system-side device belongs to the modem IC category within the broader interface IC and data-communication equipment hierarchy. Integrating the system-side functions into one package reduces the number of external components required for a telephone-line modem or data terminal adapter. The SI2434-D-FS supports 33.6 kbps operation and the listed V-series and Bell 103/212A modulation schemes. Its 16-SOIC surface-mount construction is suitable for compact communication equipment, while the 3 V to 3.6 V operating range suits modern low-voltage systems. The manufacturer describes the device as an ISOMODEM system-side component, pairing it with a compatible Skyworks line-side device in complete modem solutions. Skyworks ISOmodem devices use the patented direct access arrangement technology to provide a programmable telephone-line interface with high integration. The SI2434 provides the system-side modem functions, while a companion line-side device handles the line-facing interface. This division allows a compact two-chip implementation instead of a discrete modem, line driver, and protection network. Typical applications include asynchronous serial modems, remote-access systems, data terminal adapters, embedded telephone-line data equipment, and legacy data-communication links. The SI2434-D-FS is also appropriate for equipment that must interoperate with Bell 103 or Bell 212A systems while supporting the listed ITU V-series protocols. The principal design consideration is that the SI2434 is only the system-side portion of the chipset. Board designers must select a compatible line-side device, implement the recommended external network interface, and follow the manufacturer's reference circuit for filtering, protection, termination, and layout. Check the line-side device supply requirements and signal-level compatibility before releasing a production schematic. This page combines protocol coverage, package information, verified sourcing listings, drop-in same-family alternatives, and practical implementation guidance. It is intended to help engineers evaluate the SI2434-D-FS for legacy telephone-line modem upgrades, interface redesigns, and long-tail supply situations before requesting a quote.
SI2434-D-GT - 33.6 kbps ISOMODEM | Skyworks | 24-TSSOP
The Skyworks Solutions Inc. SI2434-D-GT is a 33.6 kbps ISOMODEM with integrated Global DAA, supporting ITU-T, Bell, V.21, V.22, V.29, V.32, V.42, V.42bis, V.44, MNP2-5, Fast Connect, and Type I and II caller-ID decoding in a 24-pin TSSOP package. An ISOMODEM is an integrated modem IC that combines digital signal processing with telephone-line interface functions. It belongs to the modem chipset family, interface IC hierarchy, and broader semiconductor category. Its Global DAA provides the analog telephone-line connection, while the integrated modem controller handles modulation, demodulation, data compression, error correction, and signaling protocols used by legacy analog, fax, and data-modem equipment. Key capabilities include support for ITU-T and Bell data rates from 300 bps through 56 kbps, automatic rate negotiation, Fast Connect operation, V.42 and V.42bis error correction, and MNP2-5 negotiation support. Caller-ID decoding for Type I and II systems provides a useful distinction in telephone equipment, while the 24-TSSOP package supports conventional surface-mount PCB assembly. Revision D applies to the SI2434, SI2435, SI2457, and SI2404 modem family documentation. This relationship allows engineers to interpret the modem formats and shared features accurately, but each orderable MPN should still be checked for its own electrical limits, pin connections, regional approval requirements, and firmware compatibility. The SI2434-D-GT is identified specifically as the Global DAA version. Typical uses include industrial data modems, remote terminal equipment, fax interfaces, telephone-line data products, and embedded analog-PSTN communication systems. In these systems, the IC can reduce board area by integrating modem signal processing and the line-side DAA, but external passive components, isolation, line protection, connectors, and approved interface circuitry remain important parts of a production design. Designers should follow the manufacturer datasheet for the exact 24-pin assignments, supply limits, clock requirements, line-side component values, and recommended layout. Do not substitute a related SI24xx MPN solely because it uses a similar package; confirm pin compatibility, Global DAA requirements, supported protocols, firmware, and applicable telephone-network approvals before releasing a replacement design. This page combines the exact product identity, package, supported modem formats, protocol capabilities, replacement assessment, and practical design guidance into one engineering reference. It also distinguishes direct replacement evidence from related-family comparisons so procurement and hardware teams can evaluate the SI2434-D-GT without confusing an orderable suffix, package variant, or protocol variant with a verified drop-in replacement.