W681388YG

Overview

The W681388YG is a single-channel programmable extended CODEC and SLIC optimized for short loop applications. It integrates SLIC functionality, a programmable CODEC, and a DC-to-DC controller within a QFN-48 package. The device supports internal ringing up to 90 VPK and handles 5 REN loads at 4 kft. Audio encoding includes μ-law/A-law and 16-bit linear PCM. Digital interfaces include PCM Master/Slave modes and SPI bus connectivity. Operating voltage is 3.3V with an on-chip PLL supporting 1MHz or 2MHz clocking options.

Feature Summary

• Performs complete BORSCHT functions for a single channel with integrated power management
• Supports programmable linefeed characteristics including ringing frequency, amplitude, and waveform types
• Enables extensive signal generation such as DTMF, metering pulses, FSK, and tone generation
• Provides loop test and diagnostics support with integrated loopback modes 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 suffix 'YG' corresponds to the QFN-48 Pb-Free package variant when sourcing. Confirm that the component is sourced from authorized distributors to ensure authenticity. Check revision status against the 01/2008 datasheet version. Ensure supply chain stability as this is a specialized telecommunications component. Validate pin compatibility if replacing existing designs.

Selection Notes

Select this component for single-port FXS telephone line interfaces requiring high integration. It is suitable for short loop applications where low power consumption is critical. Consider its programmability for reducing software overhead in voice-enabled gateways. Evaluate the QFN-48 footprint constraints against board space requirements. Verify compatibility with 3.3V logic levels and PCM/SPI host processors.

Part Context

The W681388 series serves as a highly integrated solution for analog telephony front ends. It combines subscriber line interface circuit capabilities with audio processing and power regulation. This consolidation reduces system bill of materials and simplifies design complexity for residential and enterprise communication devices.

Replacement Considerations

Direct substitutes are not explicitly listed in public documentation. Evaluate other single-channel CODEC/SLIC combinations from manufacturers like Texas Instruments or Analog Devices. Ensure equivalent BORSCHT functionality and 90V ringing capability. Verify package pinout compatibility for QFN-48 implementations.