W6811IW

Overview

The W6811IW is a single-channel voiceband PCM codec manufactured by Nuvoton Technology Corporation. It performs digitization and reconstruction of voice signals, incorporating band-limiting and smoothing filters compliant with ITU G.712 specifications. The device supports pin-selectable μ-Law or A-Law companding in accordance with ITU G.711 standards. It operates from a single +5V power supply and features fully-differential analog circuit design with an on-chip precision reference. The component is available in multiple package options including 20-pin PDIP, SOG, SSOP, and TSSOP, and is rated for the industrial temperature range of –40°C to +85°C.

Feature Summary

• Supports pin-selectable μ-Law and A-Law companding compliant with ITU G.711
• Integrates A/D and D/A filtering compliant with ITU G.712 specification
• Operates on a single +5V power supply with low power consumption capabilities
• Features fully-differential analog circuit design with push-pull power amplifiers

Applications

• Digital Telephone Systems
• Central Office Equipment such as Gateways, Switches, and Routers
• PBX Systems and PABX/SOHO Systems
• VoIP Terminals and Enterprise Phones
• Analog Line Cards and Digital Voice Recorders

Procurement Notes

Verify the manufacturer designation carefully, as the W6811 series is historically associated with Winbond. Ensure the datasheet explicitly confirms Nuvoton Technology Corporation as the current producer or rights holder. Confirm that the specific suffix 'IW' matches the required package type and temperature rating before procurement to avoid compatibility issues with existing system designs.

Selection Notes

Select this component for applications requiring a single-channel voiceband codec with standard PCM interface requirements. Verify that the system clock rates supported by the device align with the host processor's master clock outputs. Ensure the chosen package variant fits the PCB layout constraints and that the industrial temperature range meets the environmental operating conditions of the target application.

Part Context

The W6811 series belongs to the family of single-channel voiceband codecs designed for digital telephony applications. These components bridge analog voice signals and digital PCM data streams. The series is commonly utilized in telecommunications infrastructure where reliable voice quality and compliance with international standards are critical for network interoperability and performance.

Replacement Considerations

The W6810IW is a functionally similar single-channel voiceband codec. Verify pin compatibility and electrical specifications before substitution. Other generic PCM CODECs may require significant circuit redesign due to differences in interface protocols or power requirements.