W6811IEG

Overview

The W6811IEG is a single-channel voiceband PCM codec manufactured by Nuvoton Technology Corporation. It features an 8-bit resolution with one ADC and one DAC, designed for digital telephone applications. The device operates on separated analog (5V) and digital (3V) power supplies within specified voltage ranges. It supports pin-selectable μ-law or A-law companding compliant with ITU G.711 standards. The component utilizes a PCM audio interface and is housed in a 24-pin PDIP package. It functions across an 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 specifications
• Features fully-differential analog circuit design with on-chip precision reference
• Includes CODEC A/D and D/A filtering compliant with ITU G.712 specification
• Operates with separated analog and digital power supplies for noise isolation

Applications

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

Procurement Notes

Verify the specific suffix 'IEG' corresponds to the 24-pin PDIP package variant when sourcing replacements. Confirm that the target application requires separated 5V analog and 3V digital power rails, as this component does not support unified supply voltages. Ensure compatibility with standard PCM interfaces and check if pin-selectable companding meets system requirements. Validate that the industrial temperature range aligns with environmental constraints.

Selection Notes

Select this component for applications requiring a dedicated single-channel voiceband codec with standard PCM interfacing. It is suitable for systems needing separate analog and digital power domains to minimize interference. Consider its compliance with ITU G.711 and G.712 standards for regulatory adherence. Evaluate the need for pin-selectable companding flexibility versus fixed configuration alternatives. Assess package size constraints against the 24-pin DIP footprint availability.

Part Context

The W6811 series represents a family of general-purpose single-channel PCM codecs from Nuvoton Technology Corporation. These devices are engineered for telecommunication infrastructure, providing digitization and reconstruction of voice signals. The series includes various package options to suit different mounting requirements while maintaining consistent electrical performance and protocol compliance across variants.

Replacement Considerations

W6811IEG is listed as obsolete. Verify cross-compatibility with other W6811 series variants offering identical pinouts and electrical characteristics. Ensure substitute components maintain support for separated 5V/3V power supplies and ITU G.711/G.712 compliance.