SI3232-KQ - Dual-Channel Programmable SLIC | Silicon Labs
MPN： SI3232-KQ ✓ 啟用中SI3232-KQ 概覽
A SLIC is an integrated telephone-interface device that combines programmable analog voice-channel functions with digital control. It belongs to the interface IC hierarchy, connecting a voice codec or system controller to an analog telephone line. The SI3232-KQ targets CPE designs requiring two channels, centralized register configuration, and a compact low-voltage CMOS implementation.
The device provides dual-channel SLIC functionality, a 3.3 V single-supply operating requirement, and a standard SPI control interface. These features make it suitable for voice gateways, digital subscriber line equipment, analog telephone adapters, and other multi-channel voice systems. Programmability allows the controller to configure channel behavior through the serial interface instead of requiring separate fixed-function logic for each line.
Its architecture separates low-voltage channel processing from high-voltage linefeed functions. According to the supplied Silicon Laboratories datasheet, the SI3232 performs all programmable SLIC functions, whereas the Si3200 performs all high-voltage functions. This division limits high-voltage handling to the dedicated linefeed IC while allowing the SI3232-KQ to operate from 3.3 V CMOS supply rails.
Typical applications include two-channel analog telephone interfaces, customer premise equipment, voice-over-packet gateways, and telecom access products that require software-controlled SLIC operation. A system implementation must also account for the external Si3200, external line protection, and the separation between low-voltage logic and high-voltage telephone-line functions.
The principal design consideration is system partitioning. The SI3232-KQ should not be treated as a complete standalone line interface: it requires the Si3200 for high-voltage functions, suitable bypass components, careful SPI control, and application-specific protection. Verified pin-level connection and absolute timing limits should be checked against the manufacturer datasheet before layout release.
This page consolidates the verified SI3232-KQ product facts, identifies the Si3200 companion device, and separates documented characteristics from parameters that require datasheet confirmation. It also highlights sourcing and replacement constraints that are not resolved by generic SLIC cross-reference results.
直接替換替代品，適用於 SI3232-KQ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品SI3232-KQ 規格
| Product Type | Dual-channel programmable CMOS SLIC |
| Number of Channels | 2 channels |
| 供應電壓 | 3.3 V |
| Supply Architecture | Single supply |
| Process Technology | Low-voltage CMOS |
| Digital Control Interface | Standard SPI bus |
| Programmability | Fully software-programmable SLIC functions |
| High-Voltage Function Location | External Si3200 linefeed interface IC |
| 封裝 | 64-pin TQFP |
| 腳位數 | 64 pins |
| 安裝類型 | Surface mount |
| Application Category | Customer premise equipment (CPE) |
| Telephone Interface Type | Analog telephone interface |
| High-Voltage Functions | Not performed by SI3232 |
| Regulatory Support | LSSGR, ITU, and ETSI specifications |
SI3232-KQ 64-pin tqfp 腳位配置指南
SI3232-KQ（64-pin tqfp 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： SI3232-KQ.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI3232-KQ 適用於 6 應用s: Dual-Channel Analog Telephone Interface, Customer Premise Equipment, Voice Gateway and VoIP Terminal Interface, Digital Subscriber Line Access Equipment, Analog Telephone Adapter, Programmable Telecom Test Interface.
Dual-Channel Analog Telephone Interface
The SI3232-KQ fits a two-channel analog telephone interface because it combines two programmable SLIC channels with a common 3.3 V supply and SPI control path. A system controller can configure the device through the standard serial interface while the companion Si3200 handles high-voltage linefeed functions. This partitioning reduces the high-voltage burden on the SI3232-KQ and keeps the low-voltage control section compatible with customer premise equipment. The application still requires verified protection, grounding, and line-interface components around the Si3200.
推薦
Customer Premise Equipment
The SI3232-KQ is suitable for customer premise equipment because it provides a fully software-programmable dual-channel SLIC in a single 64-pin TQFP device. Its 3.3 V single-supply operation fits controller-based CPE architectures, and SPI permits centralized configuration of both analog channels. The device should be implemented with the Si3200 for high-voltage functions, together with the external protection and filtering required by the target telephone line. Firmware support for the SI3232 register model must also be confirmed before design freeze.
推薦
Voice Gateway and VoIP Terminal Interface
A voice gateway can use the SI3232-KQ when it must expose two analog telephone lines to a digital voice processor. The standard SPI interface gives the host controller a configurable path for channel setup, while the dual-channel architecture reduces the number of separate low-voltage SLIC packages. The verified 3.3 V operating requirement supports integration with modern CMOS logic. Because this is a line-facing application, engineers should not omit the Si3200, surge protection, isolation strategy, or regulatory review of the completed telephone interface.
推薦
Digital Subscriber Line Access Equipment
The SI3232-KQ can support programmable analog voice-channel functions within DSL access equipment that also contains high-speed digital line processing. Its two-channel SLIC organization allows one low-voltage IC to serve two voice paths, while SPI lets a system controller reuse the same configuration mechanism. The SI3232 remains complementary to the Si3200 because only the latter performs high-voltage functions. Board-level telephone protection, isolation, and regulatory compliance must therefore be designed around the complete SLIC-plus-linefeed arrangement.
推薦
Analog Telephone Adapter
The SI3232-KQ is applicable to a two-port analog telephone adapter when the product needs software-programmable SLIC behavior rather than a fixed-function interface. Its single 3.3 V supply and SPI control simplify integration with a digital baseband or network processor, and the 64-pin TQFP package provides a defined surface-mount implementation. The adapter must still include the Si3200 for high-voltage operation, along with suitable line protection and ringing/speech-path components. Exact pin use and timing limits must be verified from the manufacturer datasheet.
推薦
Programmable Telecom Test Interface
The SI3232-KQ can be used in telecom test equipment that needs two configurable analog SLIC channels under host control. SPI programming allows test software to vary supported channel parameters, while the fixed dual-channel structure simplifies repeatable multi-port test setups. The SI3232-KQ operates from 3.3 V, but production equipment still needs the Si3200 and appropriate external line networks to reproduce high-voltage telephone conditions. Calibration, protection, and test-safety isolation should be reviewed independently of the IC's programmable SLIC capability.
推薦
推薦產品摘要
工程參考資料，適用於 SI3232-KQ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Brand | Silicon Laboratories |
| Package | 64-pin TQFP |
| Product Type | Programmable CMOS SLIC |
| Channel Count | 2 channels |
| Supply Voltage | 3.3 V single supply |
| Digital Control Interface | Standard SPI bus |
| High-Voltage Functions | Performed by external Si3200 |
| Process Technology | Low-voltage CMOS |
| Programmability | Fully software-programmable |
| Application Category | Customer premise equipment |
主要差異化特點
- Two programmable analog channels in one device (對比Si3200)
- Single 3.3 V low-voltage CMOS supply (對比Si3200)
- Standard SPI digital configuration path (對比Si3200)
設計說明
The SI3232-KQ operates from a single 3.3 V supply, but the complete telephone interface also contains the external Si3200 and its high-voltage circuitry. Follow the manufacturer power-decoupling connections and provide local bypass close to the SI3232 supply pins. Keep the 3.3 V low-voltage return and high-voltage linefeed return strategy consistent with the reference design to avoid coupling line transients into the SPI-controlled SLIC section.
Separate the low-voltage SI3232-KQ section from the Si3200 high-voltage linefeed area and route telephone-line currents away from SPI signals and supply traces. The verified material does not provide exact keepout or creepage dimensions, so use the manufacturer application circuit, recommended layout, and applicable telephone-network isolation requirements rather than relying on generic spacing assumptions. Confirm the 64-pin TQFP land pattern directly against the package drawing.
Do not treat the Si3200 as a substitute for the SI3232-KQ: the Si3200 performs the high-voltage functions, while the SI3232 performs programmable SLIC functions. Similarly, generic cross-reference results do not prove pin compatibility. Before a replacement is approved, compare the 64-pin TQFP pinout, 3.3 V limits, SPI timing and register map, channel behavior, and the exact ordering suffix used by the production BOM.
合規資訊
The supplied SI3232-KQ datasheet states compliance with relevant LSSGR, ITU, and ETSI specifications for programmable SLIC functions, but no explicit RoHS, REACH, halogen-free, or conflict-minerals declarations were included. AEC-Q100 is not applicable to this telecom-interface IC based on the provided category information.
