W6811IE

Overview

The W6811IE is a single-channel voiceband PCM CODEC manufactured by Nuvoton Technology Corporation, designed for digital telephone systems and central office equipment. It supports pin-selectable μ-Law or A-Law companding compliant with ITU G.711 and features filtering compliant with ITU G.712. The device operates on separated analog (5V) and digital (3V) power supplies, consuming typical power of 25 mW in normal mode and 0.5 mW in power-down mode. It supports seven master clock rates ranging from 256 kHz to 4.096 MHz and includes push-pull power amplifiers with external gain adjustment capable of driving a 300 Ω load. The component is available in 24-pin PDIP, SOG, SSOP, and TSSOP packages and functions within an industrial temperature range of –40°C to +85°C.

Feature Summary

• Supports pin-selectable μ-Law and A-Law companding standards
• Integrates fully-differential analog circuit design with on-chip precision reference
• Includes push-pull power amplifiers with external gain adjustment capability
• Compliant with ITU G.712 specification for CODEC A/D and D/A filtering

Applications

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

Procurement Notes

Verify the specific suffix 'IE' against official Nuvoton documentation to confirm it denotes the industrial temperature grade (-40°C to +85°C) and package type. Ensure compatibility with required companding standards and power supply configurations before procurement. Cross-reference datasheet revisions to confirm pinout and electrical characteristics match system requirements.

Selection Notes

Select this component for applications requiring a single-channel voiceband codec with low power consumption. Verify that the system design accommodates separate analog and digital power supplies. Confirm that the available package options meet PCB layout constraints. Ensure the master clock rate requirements align with the supported range of 256 kHz to 4.096 MHz.

Part Context

The W6811 series belongs to Nuvoton's portfolio of general-purpose PCM CODECs. It serves as a direct functional equivalent to similar voiceband codecs used in telecommunications infrastructure. The device integrates digitization, reconstruction, and filtering functions into a single chip, simplifying design complexity for digital voice applications compared to discrete solutions.