SI3050-D-FT - 20-TSSOP Voice DAA | Skyworks Solutions
MPN： SI3050-D-FT ✓ 啟用中SI3050-D-FT 概覽
A DAA is a telecommunications interface IC that connects a codec or digital voice processor to an analog telephone line. It belongs to the telecom interface hierarchy: voice DAA, analog line interface, telephone interface IC, and semiconductor. Unlike a purely digital interface, the SI3050 includes line-side functions needed to supervise, monitor, and control an FXO connection while passing voice traffic through a standard telephony PCM path.
The SI3050 integrates Silicon Laboratories' isolation-capacitor approach, allowing the system-side DAA solution to avoid conventional isolation transformers, relays, and opto-isolators. According to the manufacturer datasheet, the chipset also improves surge immunity for field equipment. This integration reduces board area and component count compared with a discrete telephone-interface implementation.
Programmable operating characteristics make the SI3050-D-FT appropriate for globally connected voice products. Its SPI control interface permits register-level configuration, while PCM highway support accommodates common narrowband voice transports. The device can operate in nominal +6 dBm or +3.2 dBm TX/RX level modes, and line-voltage and loop-current monitoring help the host detect line state and fault conditions.
Typical uses include Voice over IP terminals, embedded voice gateways, telephony adapters, PBX line cards, caller-ID equipment, and small-business analog telephone interfaces. It is particularly relevant where a compact system-side interface must combine digital PCM connectivity with analog line supervision. A companion Si3011, Si3018, or Si3019 host-side DAA completes the chipset where a complete two-chip telephone interface is required.
PCB implementation should preserve the separation between the analog telephone-line pins and digital PCM or SPI circuitry. Place the required bypass and line-network components according to the manufacturer reference circuit, and route high-current line-driver returns directly to their intended power and ground structures. Use the datasheet pin-description table when assigning every package connection.
This product page combines the SI3050-D-FT interface capabilities, package details, chipset relationships, and practical implementation guidance in a searchable engineering format. It also helps distinguish the D-FT ordering code from other SI3050 family members and identifies the information needed for PCB reuse, sourcing, and system selection.
直接替換替代品，適用於 SI3050-D-FT — 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。
此系列的變體
與下列產品可直接替換的同系列型號： SI3050-D-FT （相同外形與佔位） — 差異在於 Digital Interface, Isolation Technology, Lead-Free Status, Line Monitoring, Package.
SI3050-KT
✅ 直接替換聯絡詢價
查看資料表 →SI3050-BT
✅ 直接替換📋 參考替代品（不在目錄中）
SI3050-E1-FTR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SI3050-E1-GTR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SI3050-E1-FMR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SI3050-D-FT 規格
| Product Type | System-side Digital Access Arrangement (DAA) |
| 封裝 | 20-pin TSSOP |
| Package Width | 4.40 mm |
| Package Body Length | 0.173 inch |
| 安裝類型 | Surface mount |
| Voice Signal Dynamic Range | 80 dB |
| PCM Data Format | Mu-law and A-law companding |
| Control Interface | SPI |
| Digital Interface | PCM highway and GCI |
| Line Monitoring | TX/RX line-voltage monitor and loop-current monitor |
| TX/RX Level Modes | +6 dBm or +3.2 dBm |
| Handset Interface | Parallel handset interface |
| Isolation Technology | Integrated isolation capacitor technology |
| Packaging | Tube |
| Lead-Free Status | Lead free |
| RoHS 狀態 | RoHS compliant |
| External Component Count | Minimal external components for the companion Si3011/Si3018/Si3019 chipset |
SI3050-D-FT 0.173 inch 腳位配置指南
SI3050-D-FT（0.173 inch 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： SI3050-D-FT.
請參閱 資料表 以查看完整腳位配置。
典型應用
SI3050-D-FT 適用於 6 應用s: Voice over IP Terminals, Embedded Voice Gateways, PBX Line Cards, Analog Telephone Adapters, Caller ID and Message Systems, Industrial Voice Control Panels.
Voice over IP Terminals
The SI3050-D-FT fits a Voice over IP terminal that retains an analog telephone-line connection. Its PCM highway interface transfers voice data toward the digital processor, while the SPI interface provides a configuration path for line control and monitoring. The 80 dB voice dynamic range supports a conventional narrowband voice path, and the integrated isolation-capacitor architecture reduces the isolation-component burden associated with a discrete FXO design. Engineers should still implement the exact line-network, protection, bypass, and decoupling network from the manufacturer reference circuit.
推薦
Embedded Voice Gateways
The SI3050-D-FT is appropriate for embedded gateways that bridge digital voice media and an analog FXO port. PCM highway connectivity reduces the number of parallel voice-data signals required by the system, while SPI control supports register-based configuration. TX/RX line-voltage monitoring and loop-current monitoring allow the host to identify line presence and operating conditions without adding separate supervisory circuits. The resulting board should preserve the manufacturer’s analog-versus-digital partitioning and use the documented external components for the target country.
推薦
PBX Line Cards
A PBX line card can use the SI3050-D-FT as the system-side interface for an analog subscriber or office line. Its programmable characteristics allow the host software to configure operating modes, monitor line voltage, and observe loop current during call establishment and supervision. The 20-pin TSSOP package supports compact multi-channel line-card designs, although analog isolation between channels must follow the manufacturer layout guidance. The companion Si3011, Si3018, or Si3019 provides the host-side portion of the programmable DAA chipset.
推薦
Analog Telephone Adapters
The SI3050-D-FT is well suited to analog telephone adapters designed to expose an FXO connection to a digital voice system. The device combines PCM data transport, mu-law and A-law companding, SPI configuration, and line-state monitoring in one interface. Its isolation-capacitor implementation can simplify the analog front end compared with a design containing conventional isolation transformers, relays, or opto-isolators. Final surge protection and line-network component selection should follow the country-specific reference design and applicable telephone-interface requirements.
推薦
Caller ID and Message Systems
The SI3050-D-FT can support telephone equipment that combines analog line supervision with a digital voice processor, including caller-ID and enhanced messaging products. The PCM highway carries the voice channel, while the GCI and SPI interfaces provide control paths for system configuration and line events. Line-voltage and loop-current monitoring help the firmware distinguish idle, off-hook, and fault conditions. The parallel handset interface also supports products that combine a telephone handset with digitally processed voice functions.
推薦
Industrial Voice Control Panels
The SI3050-D-FT can serve industrial voice-control panels that need a compact analog telephone interface for remote monitoring or service access. Its SPI-controlled configuration supports system-level adaptation, and the 80 dB voice dynamic range matches a narrowband voice channel. Line-voltage and loop-current monitoring provide useful supervision information for detecting disconnected or abnormal telephone lines. For industrial deployments, use the manufacturer’s isolation and surge-immunity layout practices and verify the complete system against the environmental requirements of the installation.
推薦
推薦產品摘要
工程參考資料，適用於 SI3050-D-FT — 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 | SI3050-KT | SI3050-BT | SI3050-E1-FTR | SI3050-E1-GTR | SI3050-E1-FMR |
|---|---|---|---|---|---|---|
| Package | 20-pin TSSOP | 20-pin TSSOP | 20-pin TSSOP | 20-pin TSSOP | 20-pin TSSOP | 20-pin TSSOP |
| Brand | Skyworks Solutions | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Type | System-side DAA | System-side DAA | System-side DAA | System-side DAA | System-side DAA | System-side DAA |
| Number of Pins | 20 pins | 20 pins | 20 pins | 20 pins | 20 pins | 20 pins |
主要差異化特點
- Matches the documented 20-pin TSSOP system-side DAA footprint (對比SI3050-KT)
- Combines three digital-facing interfaces in one system-side DAA (對比SI3050-BT)
- Supports programmable line supervision in the documented ordering code (對比SI3050-E1-FTR)
設計說明
Separate the analog telephone-line region from the PCM, SPI, and GCI digital region. Follow the manufacturer reference layout for isolation-capacitor placement, line-network components, bypass capacitors, and protected signal routing. Keep line-driver and sensing traces away from clocks and high-speed control signals, and use a continuous ground structure wherever the reference circuit permits.
Do not treat every SI3050 ordering suffix as automatically interchangeable. Confirm the 20-pin TSSOP footprint, pin names, supply limits, temperature grade, and companion-device requirements against the manufacturer datasheet. The SI3050-D-FT specifically supports PCM highway, SPI, GCI, mu-law and A-law companding, 80 dB dynamic range, line-voltage monitoring, and loop-current monitoring; verify that the substitute preserves the functions used by the design.
Size the supply network for the SI3050 and its companion DAA under the maximum expected voice and line-load condition. Use the manufacturer’s recommended bypass and decoupling values at the relevant supply pins, and route high-current returns without introducing shared impedance between analog line and digital circuitry. Confirm the complete board’s power budget because the system-side and host-side DAAs may not transition or sleep identically.
Treat the telephone-line pins as a high-level, potentially noisy interface even though the SI3050 uses integrated isolation-capacitor technology. Keep external protection components close to the line connector, use short return paths for surge-current events, and follow the manufacturer surge-immunity layout. Validate conducted emissions, immunity, and line behavior on the final enclosure and grounding configuration rather than relying only on component-level testing.
合規資訊
The SI3050-D-FT listing identifies RoHS compliance and lead-free construction. No separate REACH, halogen-free, conflict-minerals, or automotive qualification statement was identified.