SI2457-C-FS - 56 kbps V.90 ISO Modem | Skyworks
MPN: SI2457-C-FS ✓ NakahandaSI2457-C-FS Ulas
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.
Mga alternatibo na pwedeng ilagay na SI2457-C-FS — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Wala ng magagamit na drop-in alternatibo para sa produkto na ito.
Hilingin ang AlternatiboSI2457-C-FS Mga Spesipikasyon
| Product Type | System-side ISOmodem integrated circuit |
| Maximum Data Rate | 56 kbps |
| Primary Protocol | V.90 |
| Supported V-Series Protocols | V.21, V.22, V.23, V.32, V.34 and V.90 |
| Bell Protocol Support | Bell 103 and Bell 212A |
| Supported Packet Structures | Protocol 1 and Protocol 2 as defined by ETSI ES 201 912 |
| Packhaging | 16-SOIC |
| Terminal Count | 16 terminals |
| Package Code | SOP |
| Terminal Form | Gull wing |
| Uri ng Pagpapasok | Surface mount |
| Temperature Grade | Commercial |
| Manufacturer | Skyworks Solutions |
Gabay sa Pin Configuration ng SI2457-C-FS sop
Pin configuration para sa SI2457-C-FS (sop package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa SI2457-C-FS.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
SI2457-C-FS ay nararapat para sa 6 aplikasyons: 56 kbps V.90 Data Modem, Analog Fax Terminal Interface, Telephone Line Interface Card, Remote Monitoring and Control Link, Legacy Network Terminal Adapter, Industrial Telemetry Gateway.
56 kbps V.90 Data Modem
The SI2457-C-FS is suited to a system-side V.90 modem block requiring 56 kbps operation while also supporting lower V.21, V.22, V.23, V.32 and V.34 modes. Place the device beside the companion line-side codec and route the digital modem interface to the host controller. This partition confines analog modulation and demodulation to a dedicated 16-SOIC device while the host handles signaling and data framing. The Protocol 1 and Protocol 2 structures defined by ETSI ES 201 912 provide selectable message formats.
Inirekomenda
Analog Fax Terminal Interface
The SI2457-C-FS can support fax and multifunction terminal designs that require legacy analog-line compatibility. Its documented V.21 through V.34 and V.90 support gives the host processor access to multiple modem modes through one system-side device, while Bell 103 and Bell 212A broaden interoperability with North American analog equipment. The 16-SOIC package limits board area, but line coupling, protection and regulatory isolation must be implemented separately according to the manufacturer application circuit.
Inirekomenda
Telephone Line Interface Card
A telephone interface card can use the SI2457-C-FS as the system-side element of a channelized analog modem design. Pairing it with a line-side codec allows the board to terminate one analog line while the host processor manages call control, data transfer and diagnostics. The 56 kbps V.90 ceiling suits legacy remote-access equipment, and commercial-grade qualification supports industrial environments. Confirm supply limits, clock requirements and signal levels in the manufacturer data sheet before layout.
Inirekomenda
Remote Monitoring and Control Link
Embedded monitoring equipment can use the SI2457-C-FS to establish a V.90 or lower-rate analog data connection over an existing telephone circuit. The multi-protocol capability allows the system to fall back through lower-rate modes when line quality is poor, while the host processor handles application data and control commands. A companion line-side codec and telephone-network protection network remain necessary. The modem controller's 16-SOIC footprint helps keep the analog communication section compact beside the host electronics.
Inirekomenda
Legacy Network Terminal Adapter
A legacy terminal adapter can combine the SI2457-C-FS with a host interface to bridge older serial equipment onto analog telephone lines. Supporting V.21 through V.34 plus V.90 provides compatibility with different modem configurations, while Bell 103 and Bell 212A cover additional line-signaling modes. The device is suitable where a dedicated controller handles packet framing and the ISOmodem concentrates bit-level modulation and demodulation. Verify timing, digital levels and reset behavior in the family data sheet.
Inirekomenda
Industrial Telemetry Gateway
Industrial telemetry gateways can use the SI2457-C-FS when a site still offers only an analog telephone connection and a V.90-compatible rate is sufficient for the data payload. The commercial temperature grade matches many indoor industrial designs, and the multi-mode protocol set supports fallback operation over variable-quality lines. Keep the analog path isolated from the digital host section, follow recommended decoupling and provide the line-side codec and protection network specified in the application circuit.
Inirekomenda
Impormasyon ng Talumpati sa Engineering for SI2457-C-FS — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto |
|---|---|
| Brand | Skyworks Solutions |
| Package | 16-SOIC |
| Maximum Data Rate | 56 kbps |
| Primary Protocol | V.90 |
| Supported V-Series Protocols | V.21, V.22, V.23, V.32, V.34 and V.90 |
| Bell Protocol Support | Bell 103 and Bell 212A |
| Packet Structures | Protocol 1 and Protocol 2 as defined by ETSI ES 201 912 |
| Modem Function | System-side modulation and demodulation |
| Temperature Grade | Commercial |
| Terminal Count | 16 terminals |
Pangunahing mga Pagkakaiba
- System-side ISOmodem architecture with broad protocol support (kumpara saSI2457-C-FT)
- Smaller terminal count for space-constrained analog communication designs (kumpara saSI2457-C-FT)
- Selectable standardized message packet structures (kumpara saDiscrete analog modem implementation)
Talaan ng Disenyo
Assign every one of the 16 SOIC connections using the pin-description table in the Si2457/34/15/04 manufacturer data sheet. Keep the modem's analog-side routing away from clock and high-speed digital return paths, place bypass capacitors close to the supply pins, and preserve the component placement and ground-return geometry shown in the recommended application circuit.
Treat clock and digital interface traces as controlled-impedance paths. Route clock lines away from the analog modem connections, minimize stub branches, and provide a continuous ground reference beneath signal routes. The system-side modem must be paired with the intended line-side codec, so mismatched clocking or grounding between the two devices can appear as poor line negotiation or intermittent data errors.
Do not treat the SI2457-C-FT as a drop-in substitute for the SI2457-C-FS: the SI2457-C-FT is listed in 24-TSSOP rather than 16-SOIC. Also confirm whether a proposed ordering option changes only packing or changes electrical and temperature characteristics. Validate the actual protocol mode, line-side companion device, clock source and reset sequence against the family data sheet before releasing a production design.
Impormasyon ng Pagsunod sa Kautusan
The commercial-grade SI2457-C-FS is a legacy communications IC rather than an automotive-qualified device. Specific RoHS, REACH, lead-free, halogen-free and conflict-minerals declarations were not available in the retrieved product records.