W681512SG

Overview

The W681512SG is a single-channel voiceband CODEC manufactured by Nuvoton Technology Corporation, designed for PCM interface applications. It operates on a single +5V power supply with a voltage range of 4.5 V to 5.5 V and supports an 8-bit resolution. The device integrates one ADC and one DAC, functioning within an industrial temperature range of -40°C to +85°C. It is housed in a 20-pin SOP (SOG) package suitable for surface mount installation. The component complies with ITU G.712 specifications for filtering and ITU G.711 standards for companding.

Feature Summary

• Supports selectable μ-law or A-law companding via pin configuration
• Integrates a push-pull power amplifier capable of driving differential loads
• Features full-differential analog circuit design for improved noise performance
• Includes an on-chip precision voltage reference for stable operation

Applications

• VoIP gateways and network voice equipment
• Digital telephony systems requiring PCM interfaces
• ISDN terminal adapters utilizing IDL or GCI communication protocols

Procurement Notes

Verify component authenticity through authorized distributors as the W681512SG may be subject to discontinuation notices. Confirm package integrity upon receipt, as the SOP-20 form factor requires careful handling during inspection. Cross-reference datasheet revisions to ensure compatibility with existing system designs before procurement.

Selection Notes

Select this component for designs requiring a standalone voiceband codec with differential output capabilities. Ensure the host microcontroller supports the required PCM frame formats and clock rates between 256 kHz and 4.096 MHz. Verify that the PCB layout accommodates the 20-pin SOP footprint and provides adequate thermal dissipation for the specified operating temperature range.

Part Context

The W681512SG belongs to the W681512 family of audio interface ICs from Nuvoton. Variants such as the W681512WG and W681512RG offer identical electrical functionality but differ in packaging, utilizing TSSOP-20 and SSOP-20 forms respectively. This family is engineered for cost-effective integration into voice processing hardware.

Replacement Considerations

Direct replacements include the W681512WG and W681512RG, which share the same core specifications. Designers must account for mechanical differences when substituting the SOP package with TSSOP or SSOP variants, ensuring footprints are compatible or adapter solutions are employed.