SI3225-BQ Dual-Channel SLIC/CODEC | Silicon Laboratories
MPN: SI3225-BQ ✓ نشطSI3225-BQ نظرة عامة
A SLIC is the analog front end of a voice subscriber line, while a CODEC converts between analog voice signals and digital PCM data. The SI3225 family combines these functions into a single CMOS IC, reducing the number of discrete telephone-interface components required by a central office, voice gateway, line card, or access-equipment design. Its dual-channel architecture allows one physical device to service two subscriber lines while sharing control, clock, and power circuitry.
The SI3225-BQ supports both 3.3 V and 5 V supply configurations and has a listed maximum supply current of 65 mA. Its operating temperature range is -40°C to 85°C, with a listed maximum power dissipation of 941 mW. These ratings make the device appropriate for industrial and communications equipment that must operate from a controlled 3.3 V or 5 V system rail. The 64-pin TQFP package also provides a standardized surface-mount format for high-density line-card designs.
Programmable CMOS integration gives the device a defined role in a telephone-line interface rather than a general-purpose signal path. The SI3225 family performs the BORSCHT line functions, supports external bulk ringer operation, and is intended for line lengths up to 18 kft. Its integrated SLIC and codec architecture simplifies the relationship between the physical analog line and the host PCM or GCI data interface, while internal control supports predictable telephone-network behavior.
Typical applications include two-channel analog telephone line cards, voice-over-IP access equipment, central-office line interfaces, digital loopback and line-testing systems, and embedded voice gateways. In each design, the host processor must configure the device and exchange PCM traffic through a supported serial interface. The device is most suitable where two independent analog lines, digital voice conversion, and compact surface-mount integration are required in the same subsystem.
Design attention should focus on the 3.3 V or 5 V supply implementation, analog telephone-line routing, external bulk-ringer support, and the host interface configuration. Keep sensitive analog and line-driver traces away from high-current switching paths, follow the package and reference-design layout guidance, and verify thermal performance against the 941 mW maximum rating under worst-case line activity. Firmware and line-card validation must also confirm BORSCHT and network requirements for the intended deployment.
This product page combines the SI3225-BQ family specifications, interface and application context, verified source links, and engineering-focused design considerations. It also distinguishes temperature-ordering alternatives from functional replacements so procurement and design teams can assess compatibility without treating merely similar codecs as true drop-in devices.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع SI3225-BQ (نفس عامل الشكل والبصمة) — يختلف في Package, Product Type.
SI3225-FQ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←SI3225-BQ المواصفات
| Product Type | Dual-channel SLIC and CODEC interface IC |
| Number of Circuits | 2 channels |
| جهد التغذية | 3.3 V or 5 V |
| Maximum Supply Current | 65 mA |
| Maximum Power Dissipation | 941 mW |
| نطاق درجة حرارة التشغيل | -40°C to 85°C |
| العلبة | 64-pin TQFP |
| نوع التركيب | Surface mount |
| Host Interfaces | GCI, PCM, and SPI |
| Telephone Line Functions | BORSCHT functions |
| Maximum Line Length | 18 kft |
| Bulk Ringer Support | External bulk ringer support |
| Process Technology | Low-voltage CMOS |
| Lead-Free Status | Contains lead |
دليل تكوين أطراف SI3225-BQ 64-pin tqfp
تكوين الأطراف لـ SI3225-BQ (حزمة 64-pin tqfp). يتم تعريف ترقيم الأطراف والوظائف ومخططات التوصيل في ورقة البيانات الفنية من الشركة المصنعة. راجعها للحصول على البصمة الدقيقة وإرشادات اللحام.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ SI3225-BQ.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
SI3225-BQ مناسب لـ 6 التطبيقs: Two-Channel Voice Gateway, Central Office Line Card, Voice over IP Access Equipment, Analog Telephone Test Equipment, Digital Loopback Line Interface, Private Branch Exchange Line Interface.
Two-Channel Voice Gateway
The SI3225-BQ fits a two-channel voice gateway because it combines two analog SLIC channels and their codec functions in one 64-pin TQFP device. Its PCM, SPI, and GCI interfaces allow a host processor to configure the telephone channels and exchange digital voice traffic, while the listed 3.3 V or 5 V supplies accommodate common communications platforms. The design should use the manufacturer reference layout for line routing and protection. External bulk-ringer support may also be required. At the system level, place the two low-voltage interfaces near the host connector and keep the analog line paths away from noisy switching and high-speed digital nets.
موصى به
Central Office Line Card
The SI3225-BQ can serve two analog subscriber lines on a central-office line card while sharing one IC footprint and digital control path. Its two-channel architecture reduces board area compared with separate SLIC and codec arrangements, and its -40°C to 85°C operating range suits temperature-controlled access equipment. The host processor can use PCM for voice transport and SPI or GCI for configuration, depending on the system architecture. Designers should confirm line length, ringing, BORSCHT behavior, and protection requirements against the Silicon Laboratories SI3225 documentation before production release.
موصى به
Voice over IP Access Equipment
The SI3225-BQ is suitable for voice-over-IP access equipment that must terminate two analog lines and transfer the resulting voice data to a digital processor. Combining the SLIC and codec reduces the number of separate analog-interface devices, while PCM connectivity aligns with common digital voice datapaths. Its maximum supply current of 65 mA and 941 mW power rating support planning around a 3.3 V or 5 V communications rail. The final design must include the external protection and ringing network required by the target line, and firmware must initialize the device according to the SI3225 configuration procedure.
موصى به
Analog Telephone Test Equipment
The SI3225-BQ can be used in automated telephone-line test equipment because it provides two programmable SLIC/CODEC channels and BORSCHT functions in a single package. Test systems can connect the device to a line simulator or controlled analog network, then use PCM, SPI, or GCI access to configure measurements and exchange test traffic. The 3.3 V and 5 V supply options simplify integration into different test-platform architectures. For repeatable results, provide controlled line protection, isolate sensitive analog paths from digital switching circuitry, and validate the device across the full -40°C to 85°C operating range when required.
موصى به
Digital Loopback Line Interface
The SI3225-BQ supports digital-loopback and line-interface test functions through its integrated SLIC, codec, and host-interface architecture. Two channels allow a tester to drive or monitor dual lines, while PCM transport makes voice samples available to the supervising processor. The device's listed 65 mA maximum supply current and 941 mW maximum power dissipation help designers establish conservative rail budgets. Keep the analog inputs and line-driver outputs on controlled impedances, follow the recommended grounding scheme, and verify loopback timing and line-state behavior in firmware before using the circuit for production testing.
موصى به
Private Branch Exchange Line Interface
The SI3225-BQ can terminate two analog lines in a private branch exchange or enterprise telephone interface while a host processor handles call control and digital voice transfer. Its integrated SLIC/CODEC arrangement simplifies the analog front end, and the support for 3.3 V or 5 V supplies makes it adaptable to embedded communications platforms. The SI3225 documentation should guide line termination, external bulk-ringer, and BORSCHT configuration. Because the 64-pin TQFP contains sensitive analog and digital functions in the same package, use a single referenced ground strategy, isolate line-driver current from processor supplies, and reserve filtering and protection components at the connector entry point.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ SI3225-BQ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | SI3225-FQ |
|---|---|---|
| Package | 64-pin TQFP | 64-pin TQFP |
| Brand | Silicon Laboratories | Silicon Laboratories |
| Number of Channels | 2 channels | 2 channels |
| Host Interfaces | GCI, PCM, and SPI | GCI, PCM, and SPI |
| Telephone Line Functions | BORSCHT functions | BORSCHT functions |
| Bulk Ringer Support | External bulk ringer support | External bulk ringer support |
| Process Technology | Low-voltage CMOS | Low-voltage CMOS |
أبرز الفروقات
- Combines two complete SLIC and CODEC channels in one device (مقابلSI3225-FQ)
- Supports three communications paths for host integration (مقابلSI3225-FQ)
- Supports common low-voltage communications rails (مقابلSI3225-FQ)
- Provides integrated line-control functionality (مقابلSI3225-FQ)
ملاحظات التصميم
Follow the Silicon Laboratories SI3225 reference layout for the 64-pin TQFP footprint, exposed-pad arrangement, and line-interface routing. Keep the dual analog line paths away from switching-regulator outputs, high-speed clock traces, and digital return currents. Use a continuous ground reference beneath the device where the package and board design permit, and place protection components close to the external line connectors so surge current does not traverse sensitive circuitry.
Design the 3.3 V or 5 V supply path for the listed 65 mA maximum supply current while allowing margin for line-driver activity, external ringing circuitry, and local decoupling. Place bypass capacitors at the device supply pins with short ground returns and separate sensitive analog supplies from switching stages where possible. Verify the 941 mW maximum power-dissipation limit against ambient temperature and the actual operating mode rather than assuming every channel remains at idle consumption.
Preserve the integrity of PCM, SPI, and GCI clock and data routes because incorrect clock topology or trace coupling can produce intermittent voice-channel errors. Match interface impedance and length according to the SI3225 hardware guidance, keep clock traces away from the analog line drivers, and provide a low-impedance return path beneath each interface. Validate signal timing at the system level across all three supported supply configurations.
Do not treat a shared package name as proof that an alternate ordering code is a production drop-in replacement. For SI3225-FQ, confirm the temperature grade, electrical limits, lifecycle status, firmware expectations, and qualification profile against the SI3225-BQ application. Also verify whether the system requires external bulk-ringer support and ensure the line-protection network is designed for the maximum intended telephone-line voltage.
Estimated: if the SI3225-BQ reaches its listed maximum dissipation of 941 mW, thermal design must keep the junction temperature within the device rating while the PCB is in its installed enclosure. The actual temperature rise depends on package construction, board copper, airflow, and adjacent heat sources, so calculate it using the approved package model and verify with thermocouples during worst-case line activity. Reduce dissipation or improve airflow if the operating margin is inadequate.
معلومات الامتثال
The SI3225-BQ listing identifies the lead-free status as containing lead. RoHS, REACH, halogen-free, and conflict-minerals status are not stated in the cited sources. AEC-Q100 is not applicable to this communications interface IC because no automotive qualification is identified.