SI3230-KT - Programmable CMOS SLIC with Ringing | Skyworks
料号： SI3230-KT ✓ 量产中SI3230-KT 概述
A subscriber line interface circuit, or SLIC, is the analog line-side component of a voice-over-packet or legacy telephone system. It connects the telephone line to a digital voice processor, supervises the line state, generates dial and ring signals, and helps establish the DC line voltage required by conventional handsets. Within the communications hierarchy, the SI3230-KT is a ProSLIC integrated circuit that combines line-interface functions with programmable ringing and battery supply generation rather than relying on a large collection of discrete telephone-line components.
The main advantages of the SI3230-KT are integration and configuration flexibility. Its software-programmable internal ringing generator supports balanced ring voltages as high as 90 VPK, while the integrated battery supply provides dynamic line-voltage generation. Software control also enables DTMF signaling and codec-interface adjustment, allowing one hardware design to support multiple ringing and line-state requirements. The codec interface integrates the SLIC with a companion digital voice processor without requiring a separate physical telephone line for every configuration.
The SI3230-KT includes a BJT/inductor DC-DC converter for the battery supply, as described in the manufacturer documentation. This converter supports the elevated DC and ringing voltages required by analog subscriber lines. Because the converter, ringing generator, battery supply, and signaling logic share one integrated package, the design must account for both analog line quality and the switching energy associated with generating ring voltage. Component selection for the external inductor and energy-storage network should follow the reference configuration and required ringing cadence in the datasheet.
Typical applications include Voice over IP endpoint designs, digital subscriber line equipment, analog terminal adapters, voice gateways, embedded telephony controllers, and centralized telephone line cards. The device is particularly suitable when a compact single-channel solution is needed for line supervision, hook detection, DTMF handling, ringing generation, and codec interfacing. In multichannel equipment, several SI3230-KT devices may be arranged around a common voice processor, subject to channel-to-channel isolation, thermal, and routing requirements.
Designers should preserve the separation between the line-side and codec-side circuitry, use the recommended ringing and battery-supply external components, and route sensitive analog and high-voltage ring-node connections carefully. The 3.13 V to 5.25 V supply requirement and approximately 88 mA supply current must be accommodated by the host power supply. Because the package exposes high-voltage line functions, board cleanliness, insulation spacing, and protection strategy are as important as low-noise digital layout.
This product page combines the principal line-interface capabilities, package constraints, sourcing guidance, and design considerations needed to evaluate the SI3230-KT. It also distinguishes documented device features from parameters that require confirmation against the latest manufacturer datasheet, helping engineers assess it for telecom and embedded voice applications without changing the PCB footprint during early design review.
直接替换替代料： SI3230-KT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
SI3230-E-FMR
✅ 直接替换📋 参考替代料（不在目录中）
SI3230M-E-FM
✅ 直接替换📋 参考替代料（不在目录中）
SI3230M-E-FMR
✅ 直接替换📋 参考替代料（不在目录中）
SI3230-KT 规格参数
| Device Type | Programmable CMOS subscriber line interface circuit (ProSLIC) |
| Number of Channels | 1 channel |
| Supply Voltage Range | 3.13 V to 5.25 V |
| 电源电流 | 88 mA |
| Power Dissipation | 700 mW |
| Internal Ringing Voltage | 90 VPK maximum |
| Ringing Load at 4 kft | 5 REN |
| Ringing Load at 8 kft | 3 REN |
| DTMF Support | Generation and decoding |
| Codec Interface | Software-programmable serial codec interface |
| Battery Supply Architecture | Integrated battery supply with dynamic voltage output |
| DC-DC Converter | On-chip BJT/inductor DC-DC converter |
| Interface Standard | SPI |
| 封装 | 38-pin TFSOP surface-mount package |
| 安装类型 | Surface mount |
SI3230-KT 38-pin tfsop surface-mount package 引脚配置指南
SI3230-KT（38-pin tfsop surface-mount package 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SI3230-KT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI3230-KT 适用于 6 应用s: Voice over IP Phone Interface, Analog Terminal Adapter, Digital Subscriber Line Equipment, Voice Gateway Line Card, Embedded Telephony Controller, Industrial Telephony Monitor.
Voice over IP Phone Interface
The SI3230-KT fits a Voice over IP endpoint that must present a conventional analog telephone line while a digital voice processor handles packetized audio. Its software-programmable codec interface connects the line-side channel to the host processor, and the integrated DTMF generation and decoding simplifies signaling support. The programmable balanced ringing generator can produce up to 90 VPK, while the specified loading limits of 5 REN at 4 kft or 3 REN at 8 kft guide line design. A practical implementation must also include the required external line-network components and validate echo-cancellation behavior.
推荐
Analog Terminal Adapter
An analog terminal adapter can use the SI3230-KT to bridge an RJ-style subscriber line and an embedded voice system. The integrated battery supply, dynamic voltage output, and internal ringing generation reproduce several functions that would otherwise require discrete line components. With a 3.13 V to 5.25 V host supply, the device fits compact adapters that must generate ringing, supervise hook state, and exchange DTMF tones. Engineers should use the manufacturer reference circuit for the external inductor and protection network, and confirm regulatory line-interface requirements before production release.
推荐
Digital Subscriber Line Equipment
The SI3230-KT is applicable to DSL and subscriber-loop equipment requiring a controlled analog line interface alongside digital signal processing. Its single-channel architecture supports compact line cards where each subscriber channel needs software-configured ringing, battery voltage, DTMF, and codec control. Internal balanced ringing up to 90 VPK and load capability of 5 REN at 4 kft or 3 REN at 8 kft provide defined operating limits for the line network. Layout should preserve isolation between the codec side and line side while providing clean supply decoupling and robust surge protection.
推荐
Voice Gateway Line Card
A voice gateway line card can combine the SI3230-KT with a host processor to provide one analog line per integrated channel. Software programming allows the system to adjust ringing, DTMF signaling, line supervision, and codec behavior without changing the PCB. The single-channel device is useful when variable subscriber density or independent line configuration matters more than very high channel count. Because each instance includes a DC-DC converter for dynamic battery voltage, the board must account for converter layout, ringing transients, synchronization with the host interface, and adequate channel-to-channel separation.
推荐
Embedded Telephony Controller
The SI3230-KT can serve an embedded telephony controller that needs standard analog-line behavior in a compact instrument. A host MCU can configure the integrated codec interface, DTMF functions, line supervision, and ringing cadence through firmware. Because the device operates from 3.13 V to 5.25 V, it is compatible with systems that already distribute a 5 V rail internally, subject to startup and transient requirements. The design must use the manufacturer reference network for ringing and battery generation and should verify line impedance, insulation, and surge requirements for its target installation class.
推荐
Industrial Telephony Monitor
An industrial telephony monitor can use the SI3230-KT to supervise a subscriber line and generate controlled ring and DTMF signals for equipment testing. Software-programmable ringing up to 90 VPK enables repeatable line stimulus, while the codec interface allows monitoring equipment to connect to a voice path. The supported REN values should be selected according to the simulated line load and ringing frequency. For industrial deployment, the board must include approved protection components, controlled high-voltage routing, test-point access, and thermal verification of the integrated DC-DC converter.
推荐
推荐产品汇总
工程参考数据： SI3230-KT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SI3230-E-FMR | SI3230M-E-FM | SI3230M-E-FMR |
|---|---|---|---|---|
| Package | 38-pin TFSOP | 38-pin QFN | 38-pin QFN | 38-pin QFN |
| Brand | Skyworks Solutions Inc. | Skyworks Solutions Inc. | Skyworks Solutions Inc. | Skyworks Solutions Inc. |
| Device Type | Programmable CMOS ProSLIC | Programmable CMOS ProSLIC | Programmable CMOS ProSLIC | Programmable CMOS ProSLIC |
| Number of Channels | 1 channel | 1 channel | 1 channel | 1 channel |
| Internal Ringing Voltage | 90 VPK maximum | 90 VPK maximum | 90 VPK maximum | 90 VPK maximum |
| DTMF Functions | Generation and decoding | Generation and decoding | Generation and decoding | Generation and decoding |
| Codec Interface | Software-programmable | Software-programmable | Software-programmable | Software-programmable |
| Battery Supply | Integrated dynamic voltage output | Integrated dynamic voltage output | Integrated dynamic voltage output | Integrated dynamic voltage output |
关键差异点
- Integrated programmable ringing and battery generation （对比 SI3230M-E-FM)
- Defined single-channel ringing-load capability （对比 SI3230-E-FMR)
- Integrated DTMF generation, decoding, and codec control （对比 SI3230M-E-FMR)
设计说明
Use the manufacturer reference layout for the ringing inductor, battery-supply network, and codec interface. Keep the sensitive codec-side return path separated from line-side switching currents, place local supply decoupling at the device supply pins, and route high-voltage ring and battery nodes as compact, protected nets. Confirm the exact TFSOP or QFN ordering variant before releasing the footprint.
Design the host supply for startup, ringing, and converter transients rather than the nominal 88 mA operating current alone. The SI3230-KT uses an internal BJT/inductor DC-DC converter to generate dynamic battery voltage, so inductor selection, saturation margin, supply ripple, and sequencing affect line quality. Validate the design with the manufacturer external-component values and representative line loads.
Do not assume that all 38-pin SI3230 variants share the same PCB footprint or terminal arrangement. The SI3230 family is documented in both QFN and TSSOP-style packages, and ordering suffixes can indicate configuration differences. Before substituting, compare every pin, package drawing, codec timing requirement, ringing limit, firmware dependency, and production status.
Treat ringing and battery-generation circuits as potential noise sources even though the interface is integrated. Use a compact high-current loop around the converter inductor, provide effective supply bypass paths, and maintain separation between codec clocks, digital control signals, and line-side nodes. Confirm conducted and radiated emissions at the finished equipment level because PCB stack-up and cable geometry affect the final result.
合规信息
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration is identified for the SI3230-KT ordering code.
