W681388DG

Overview

The W681388DG is a single-channel programmable extended CODEC and SLIC integrated circuit manufactured by Winbond, distributed under the Nuvoton brand. It implements complete BORSCHT functions for FXS telephone line interfaces optimized for short loop applications. The device integrates SLIC functionality with a programmable CODEC supporting μ-law/A-law or 16-bit linear PCM encoding, alongside an on-chip DC-to-DC controller. Key electrical parameters include internal balanced ringing up to 90 VPK (5 REN at 4 kft), constant current feed ranging from 20 to 41 mA, and 3.3V operation. It features PCM Master/Slave modes, SPI bus interface, and an on-chip PLL supporting 1MHz/2MHz clocking options.

Feature Summary

• Performs complete BORSCHT functions for a single channel with a single device
• Integrates SLIC, programmable CODEC, and DC-to-DC controller for high system integration
• Supports comprehensive signaling capabilities including DTMF, FSK, and tone generation
• Features programmable linefeed characteristics and extensive loop supervision diagnostics

Applications

• Analog Telephone Adapter
• Voice enabled DSL Modems
• Residential VoIP Gateways / Routers
• Integrated Access Devices
• Optical Network Terminals (ONT)

Procurement Notes

Verify the manufacturer designation as Winbond, as the component originates from their product line. Confirm the package type corresponds to the DG suffix, which indicates LQFP-48 Pb-Free construction. Ensure compatibility with 3.3V logic levels and check for RoHS compliance status in the specific batch documentation prior to procurement.

Selection Notes

Select this component for designs requiring a single-chip solution for FXS line interfaces with integrated power management. It is suitable for applications needing programmable impedance matching and transhybrid balancing for worldwide deployment. Consider the LQFP-48 package constraints and verify that the host processor supports the required PCM or SPI digital interfaces for control and data transfer.

Part Context

The W681388 is part of Winbond's single programmable extended CODEC/SLIC family. The DG suffix specifically denotes the LQFP-48 leaded package variant, while the YG suffix indicates the QFN-48 package. This series is designed to reduce system bill of materials by integrating multiple discrete front-end components into one IC.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.