W684386FG

Overview

The W684386FG is a quad programmable extended CODEC and Subscriber Line Control Circuit (SLCC) manufactured by Nuvoton Technology Corporation. It integrates four FXS telephone line interfaces optimized for short loop applications, performing complete BORSCHT functions within a single QFP-128 package. The device supports internal balanced and unbalanced ringing up to 90 VPK with a capacity of 5 REN at 4k ft. Audio encoding is configurable for μ-law, A-law, or 16-bit linear PCM. Operating voltage is specified at 3.3V. Digital interfaces include PCM, GCI, and SPI, supporting both master and slave modes with an on-chip PLL for flexible clocking options.

Feature Summary

• Integrates SLCC functionality with quad programmable CODECs and DC-to-DC controllers for comprehensive line interface management
• Supports extensive signaling capabilities including DTMF generation, FSK, metering pulse generation, and enhanced caller ID
• Features programmable linefeed characteristics such as impedance matching, trans-hybrid balancing, and constant current feed
• Includes integrated power management options with per-channel and centralized transformer-based DC-to-DC control

Applications

• Residential VoIP Gateways and Routers
• Analog Telephone Adapters (ATA)
• Optical Network Terminals (ONT)
• Integrated Access Devices
• Voice-enabled DSL Modems

Procurement Notes

Verify the specific ordering suffix FG against official documentation to confirm the QFP-128 package type and RoHS compliance status. Ensure compatibility with system requirements for 3.3V operation and digital interface protocols before procurement. Confirm availability through authorized distributors as lead times may vary based on production schedules.

Selection Notes

Select this component for designs requiring high integration of four voice ports in a compact footprint. Evaluate the need for internal ringing capabilities up to 90 VPK and specific audio encoding formats. Consider the benefits of reduced software overhead due to high programmability and the inclusion of on-chip diagnostics like temperature sensing.

Part Context

This part belongs to the W684386 series of quad programmable extended CODECs/SLCCs from Nuvoton. It is designed to replace discrete front-end protection and analog components in telephony systems, consolidating line feed, signaling, and audio processing into one integrated circuit.

Replacement Considerations

Check for updated revisions or alternative packages within the same family. Verify pinout compatibility if substituting with other models in the W6843xx series.