SI3232-FQ - Dual-Channel 3.3V ISDN SLIC | Silicon Labs
MPN: SI3232-FQ ✓ NakahandaSI3232-FQ Ulas
A Subscriber Line Interface Circuit, or SLIC, is an integrated-circuit category within analog and telecom interface ICs. It connects a telephone line to a digital or voice-processing system, providing line supervision, DC feed, ring generation, caller-status signaling, and the analog termination required for voice-band operation. In the electronics hierarchy, the SI3232-FQ is a dual-channel SLIC, a telecom interface IC, and ultimately a semiconductor designed for customer-premise telephony equipment.
Key features include two integrated analog channels, software-programmable operation, internal balanced ringing rated to 65 Vrms, and low standby consumption below 65 mW per channel. The 3.3 V supply operation is suitable for modern embedded voice systems, while the 28 mA operating current helps control total board-level consumption. Its 64-TQFP package provides a compact surface-mount footprint for CPE designs requiring two telephone interfaces.
The SI3232-FQ uses a low-voltage CMOS architecture and combines line-interface functions that would otherwise require multiple discrete or integrated circuits. The -FQ ordering code identifies the lead-free 64-TQFP package associated with a 10 mm × 10 mm body. Because this is a high-voltage telephone-interface device, correct isolation, protection, component spacing, and board-layout practices remain essential even though its logic supply is only 3.3 V.
Typical uses include ISDN terminal adapters, VoIP phones, voice gateways, customer-premise analog phone adapters, small-business telephone systems, and embedded telephony equipment. In each case, the two channels can serve separate subscriber lines while software control configures line behavior and monitoring functions. The device is particularly relevant where a compact, integrated SLIC is preferred over discrete line-driver circuitry.
Designers should not assume that the 3.3 V logic supply is the only voltage present at the line pins. Balanced ringing can reach 65 Vrms, so external protection, insulation coordination, and creepage or clearance planning must satisfy the applicable telephone-interface requirements. Decoupling should be placed close to the supply pins, and the complete line network should be validated under off-hook, on-hook, surge, and ringing conditions.
This product record combines verified distributor specifications, source-backed interface characteristics, and design guidance focused on the SI3232-FQ. It also distinguishes the confirmed SI3232-G-FQ cross-reference candidate from unverified alternatives, avoiding unsupported claims about pin-compatible parts while helping engineers evaluate the original dual-channel SLIC for legacy CPE, ISDN, and VoIP designs.
Mga alternatibo na pwedeng ilagay na SI3232-FQ — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
SI3232-G-FQ
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
SI3232-FQ Mga Spesipikasyon
| Product Type | Dual-channel Subscriber Line Interface Circuit (SLIC) |
| Number of Channels | 2 channels |
| Interface Standard | ISDN |
| Supply Voltage Range | 3.13 V to 3.47 V |
| Nominal Supply Voltage | 3.3 V |
| Operating Supply Current | 28 mA |
| Power Dissipation | 280 mW |
| Standby Power | <65 mW per channel |
| Internal Balanced Ringing | 65 Vrms |
| Architecture | Low-voltage CMOS |
| Programmability | Fully software programmable |
| Application Segment | Customer-premise equipment (CPE) |
| Hanay ng Temperature na Operasyon | 0 °C to +70 °C |
| Packhaging | 64-TQFP (10 mm × 10 mm) |
| Uri ng Pagpapasok | Surface mount |
| Lead-Free Status | Lead-free |
| Moisture Sensitivity | Moisture sensitive |
| Tindminan RoHS | Unknown |
| REACH Status | Unknown |
| AEC-Q100 Qualification | Not applicable |
Gabay sa Pin Configuration ng SI3232-FQ 64-tqfp (10 mm × 10 mm)
Pin configuration para sa SI3232-FQ (64-tqfp (10 mm × 10 mm) 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 SI3232-FQ.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
SI3232-FQ ay nararapat para sa 6 aplikasyons: ISDN Terminal Adapter, VoIP Desktop Phone, Customer-Premise Voice Gateway, Analog Telephone Adapter, Small-Business PBX Line Card, Legacy Voice Processing System.
ISDN Terminal Adapter
The SI3232-FQ fits an ISDN terminal adapter because it combines two programmable subscriber-line channels with a 3.13 V to 3.47 V logic supply. Its 28 mA operating current and standby power below 65 mW per channel help fit the interface into compact CPE without creating excessive local power demand. A host controller can configure the two channels while the SLIC handles the analog line-side functions and generates balanced ringing up to 65 Vrms. The design must still include approved line protection and verify ringing and supervision behavior across the intended network conditions.
Inirekomenda
VoIP Desktop Phone
A dual-line VoIP desktop phone can use the SI3232-FQ when it needs two software-programmable analog line interfaces alongside a 3.3 V host platform. The 64-TQFP, 10 mm × 10 mm package conserves board area, while operating current of 28 mA and standby power below 65 mW per channel support energy-conscious CPE. Because the SLIC can generate 65 Vrms balanced ringing, the PCB must separate line-side energy from sensitive audio and logic circuitry while preserving the approved protection network and required isolation boundaries.
Inirekomenda
Customer-Premise Voice Gateway
The SI3232-FQ is appropriate for a customer-premise voice gateway requiring two subscriber lines and a compact common logic supply. Its fully programmable CMOS architecture allows a host processor to control both channels, while the dual-channel format reduces the number of line-interface ICs needed per gateway. The verified 3.3 V supply range and 28 mA operating current simplify shared power planning, but engineers must budget the complete 65 Vrms balanced-ringing interface and its protection components rather than sizing the board solely around the 3.3 V core supply.
Inirekomenda
Analog Telephone Adapter
In an analog telephone adapter, the SI3232-FQ provides the line-facing circuitry needed to connect a traditional telephone line to digital voice equipment. Two integrated channels can support dual-line adapters, while the fully programmable architecture supports host-managed line supervision and ring handling. Its compact 64-TQFP package and 3.3 V operation suit CPE form factors. Production designs must validate DC feed, on-hook and off-hook behavior, ring voltage, line monitoring, surge protection, and regional network requirements rather than treating the SLIC as a complete unprotected telephone-line front end.
Inirekomenda
Small-Business PBX Line Card
The SI3232-FQ can serve as the subscriber-line front end on a small-business PBX line card where each channel must support a programmable telephone interface. Its dual-channel arrangement reduces component count, and the 3.13 V to 3.47 V operating range is compatible with a centralized 3.3 V power architecture. The 280 mW listed power dissipation provides a starting point for board-level thermal budgeting, while the 65 Vrms balanced ringing capability requires reinforced separation, protection, and surge testing. Host firmware and line parameters must be validated for each supported exchange or trunk type.
Inirekomenda
Legacy Voice Processing System
The SI3232-FQ is useful in a legacy voice-processing system that retains analog subscriber lines but requires a programmable modern interface controller. Two channels can share a common 3.3 V supply, and the 28 mA operating current plus low standby power are relevant to compact embedded telephone platforms. Integration still requires careful analog partitioning, especially where ringing reaches 65 Vrms. Keep noisy line-drive and protection currents away from sensitive voice signals, follow the manufacturer's application guidance, and validate the complete interface under dc, ac, ringing, and transient conditions.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for SI3232-FQ — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | SI3232-G-FQ |
|---|---|---|
| Brand | Silicon Labs | Silicon Labs |
| Package | 64-TQFP (10 mm × 10 mm) | 64-TQFP (10 mm × 10 mm) |
| Product Type | Dual-channel SLIC | SI3232-family telecom interface |
| Application Segment | Customer-premise equipment | SI3232-series subscriber-line interface |
Pangunahing mga Pagkakaiba
- Two-channel integration (kumpara saSI3232-G-FQ)
- Documented low standby consumption (kumpara saSI3232-G-FQ)
- Integrated balanced ringing (kumpara saSI3232-G-FQ)
- Compact 3.3 V integration (kumpara saSI3232-G-FQ)
Talaan ng Disenyo
The SI3232-FQ logic supply is limited to 3.13 V to 3.47 V, so a 3.3 V rail must remain within the verified operating range under load and temperature. Place the required bypass capacitors close to the supply and ground pins and use the manufacturer’s recommended network. Do not treat the 280 mW listed power dissipation as total system consumption: external protection, ring-driver components, isolation, and the telephone network can create additional board-level energy and thermal requirements.
Separate the 65 Vrms balanced-ringing region from low-level voice, logic, and host interfaces. Maintain the package and PCB clearance required by the manufacturer’s line-interface application guidance, preserve continuous ground references, and place surge-protection components directly at the line entry. Avoid routing sensitive audio or control signals beneath line-side circuitry, and verify isolation boundaries after the mechanical layout is complete rather than relying only on schematic spacing.
The 3.3 V core supply does not make the SI3232-FQ a low-voltage-only interface. Balanced ringing reaches 65 Vrms, and the line side can also present dc feed and transient energy. Do not omit the approved protection network, test the circuit with ringing and off-hook states, and confirm line supervision, DC characteristics, surge immunity, and regional telephone-network requirements. A successful logic-level schematic review is not sufficient validation of the analog line interface.
Use the verified 280 mW device power dissipation as an initial thermal input and calculate the total board dissipation separately. Estimated board heat from the SI3232-FQ alone equals 280 mW, but the result does not include external protection and ringing components and therefore does not establish the junction temperature. Confirm the actual operating mode, ambient range, PCB copper area, nearby heat sources, and package thermal data from the official datasheet before defining a temperature-rise budget.
Keep analog line and voice signals away from high-current switching paths and use the manufacturer’s recommended grounding and filtering arrangements. Place bypass and protection parts where their connection to the relevant pins is electrically short, and route sensitive nets before adding dense line circuitry. Validate dc feed, ring waveform, voice gain, distortion, noise, and off-hook behavior on physical hardware because schematic connectivity alone cannot establish line-interface performance.
Impormasyon ng Pagsunod sa Kautusan
The Mouser listing explicitly identifies the SI3232-FQ as lead-free. The supplied excerpts do not provide verified RoHS, REACH, halogen-free, or conflict-minerals declarations, so those fields remain unknown. AEC-Q100 is not applicable to this telecom interface IC.
