Skyworks Solutions Inc. SI3019-F-GMR

Overview

SI3019-F-GMR from Skyworks Solutions is a line-side voice Data Access Arrangement (DAA) IC for FXO analog telephony interfaces, implementing patented capacitive isolation (≥5000 V), programmable AC/DC termination, and integrated ring detection. It operates at 3.3 V, supports 8–16 kHz sampling, delivers 80 dB dynamic range, and pairs with the Si3050 system-side controller in VoIP gateways and IP-PBX systems.

For engineers reviewing the SI3019-F-GMR datasheet, SI3019-F-GMR pinout, SI3019-F-GMR application, or SI3019-F-GMR equivalent, this page provides verified technical context, exact pin functions, real-world use scenarios in DSL IADs and DECT base stations, and validated alternative options for global FXO interface design.

Technical Context

The SI3019-F-GMR implements a fully programmable FXO line interface with dual-mode DC termination (configurable for 20–120 mA loop current), adaptive ring detection (three voltage thresholds: 15/21.5/45 V_RMS), and integrated analog hybrid for 2-wire to 4-wire conversion. It supports ground-start and loop-start signaling while maintaining <5 µA on-hook leakage.

It features SPI-controlled digital gain adjustment in 0.1 dB steps, programmable transhybrid balance (30 dB typical at 1 kHz), and dual filter paths-FIR (74 dB stopband attenuation) and IIR-for transmit/receive signal conditioning across 300–3400 Hz voice band.

Key Specifications

Pinout & Package

SI3019-F-GMR is housed in a 20-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pinout is validated per Skyworks Rev. 1.5 datasheet Section 7 and Package Outline #15.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FXO line interface applications.

Compared with SI3019-F-GMR, Si3018-F-GMR offers identical form-factor and basic FXO functionality but reduced ring flexibility and CID fidelity, while SLIC1200-IM represents a fundamentally different architectural approach requiring additional components and higher power.

Availability

SI3019-F-GMR is available at Aetrix Electronics and suitable for DSL IADs, VoIP gateways, and IP-PBX systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SI3019-F-GMR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, broadband, automotive, and industrial markets.

The SI3019-F-GMR belongs to Skyworks' Voice DAA chipset family, engineered specifically for transformerless, globally compliant FXO analog telephony interfaces in next-generation VoIP infrastructure.

FAQ

What is the primary function of the SI3019-F-GMR in a voice communication system?

The SI3019-F-GMR serves as the line-side Data Access Arrangement (DAA) IC in an FXO interface, handling all physical-layer functions between the PSTN telephone line (TIP/RING) and the system-side controller (e.g., Si3050). It manages loop supervision, ring detection, off-hook signaling, DC/AC termination, and voice signal conditioning - all using Skyworks' patented capacitive isolation technology. The SI3019-F-GMR enables transformerless, globally compliant analog telephony connectivity.

Does the SI3019-F-GMR require external isolation components?

No, the SI3019-F-GMR does not require external isolation transformers, relays, or optocouplers. It integrates Skyworks' patented capacitive isolation technology, delivering ≥5000 V RMS isolation between the line side and system side. This eliminates associated BOM cost, board space, and reliability concerns of discrete isolation components while meeting ITU-T K.21 surge immunity requirements. The SI3019-F-GMR achieves this with internal high-voltage capacitors and proprietary barrier architecture.

How does the SI3019-F-GMR support multiple regional ring standards?

The SI3019-F-GMR supports three programmable ring detect voltage thresholds - 15 V_RMS, 21.5 V_RMS, and 45 V_RMS - selectable via register configuration. These correspond to North American (Type I), European (Type II), and Japanese ring signal standards respectively. The device uses differential inputs RNG1/RNG2 and internal comparators to reliably detect ring events across all three ranges without hardware changes. This configurability makes the SI3019-F-GMR suitable for global product deployment.

What power supply requirements does the SI3019-F-GMR have?

The SI3019-F-GMR operates from a single 3.3 V ±10% supply (VD = 3.0–3.6 V), drawing 8.5–10 mA in active mode and as low as 1.3–1.5 mA in deep sleep mode. It includes an internal VREG output that supplies regulated 3.3 V to its analog sections and requires a 1 µF ceramic capacitor for stability. No secondary voltage rails or LDOs are needed, simplifying power design. All digital I/Os are 3.3 V tolerant, eliminating level-shifting requirements when interfacing with common microcontrollers.

Can the SI3019-F-GMR be used without the Si3050 system-side controller?

No - the SI3019-F-GMR is designed exclusively as a line-side companion to the Si3050 system-side controller and cannot operate autonomously. It relies on the Si3050 for PCM/GCI data transport, SPI register access, clock generation (PCLK, FSYNC), and overall state management. The two devices form a tightly coupled chipset: the Si3050 handles digital interface, codec, and control logic, while the SI3019-F-GMR handles high-voltage line-side analog functions. Their interface is defined in the Skyworks Si3050+Si3011/18/19 datasheet Rev. 1.5.