W681388DG TR

Overview

The W681388 is a single-channel programmable extended CODEC and SLIC designed for short-loop telephone line interfaces. It integrates Subscriber Line Interface Circuit (SLIC) functionality with a DC-to-DC controller, performing complete BORSCHT functions. The device supports internal ringing up to 90 VPK and accommodates 5 REN loads at 4 kft. Audio encoding is configurable for μ-law/A-law or 16-bit linear PCM. Digital communication utilizes PCM Master/Slave modes and an SPI bus interface. An on-chip PLL provides flexible clocking options including 1MHz and 2MHz frequencies for 3.3V operation. Available in LQFP-48 and QFN-48 packages.

Feature Summary

• Integrates SLIC, programmable CODEC, and DC-to-DC controller for comprehensive line interface management
• Supports programmable signaling capabilities including DTMF, FSK, metering pulses, and tone generation
• Features integrated power management with DC-DC regulation to minimize power dissipation
• Includes loop test and diagnostics support with real-time linefeed monitoring and temperature sensing

Applications

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

Procurement Notes

Verify the specific package suffix against official documentation, as 'DG' denotes LQFP-48 while 'YG' indicates QFN-48. Confirm current availability status directly with Nuvoton Technology Corporation or authorized distributors, as component lifecycle stages may affect supply chain continuity. Ensure environmental compliance requirements match project specifications before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high integration of FXS line interface functions within a small footprint. Consider the device when system design demands reduced bill of materials through consolidated BORSCHT processing. Evaluate compatibility with existing PCM or SPI digital interfaces and verify that the 3.3V operating voltage aligns with the target processor architecture.

Part Context

The W681388 belongs to the family of single programmable extended CODECs and SLICs originally developed by Winbond and subsequently managed by Nuvoton Technology Corporation. This series targets telecommunications equipment requiring compact, low-power solutions for analog telephone line interfacing in modern voice-enabled networking hardware.

Replacement Considerations

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