W681310SG TR

Overview

The W681310SG TR is a single-channel PCM CODEC manufactured by Nuvoton Technology Corporation. It operates from a single +3V power supply (2.7V to 5.25V) and supports pin-selectable μ-Law or A-Law companding compliant with ITU G.711. The device includes an on-chip precision voltage reference and push-pull power amplifiers capable of driving 300Ω loads differentially up to 3.544V peak-to-peak. It accepts eight master clock rates between 256 kHz and 4.800 MHz, with an internal pre-scaler for system timing. Performance is specified over the industrial temperature range of –40°C to +85°C.

Feature Summary

• Fully-differential analog circuit design reduces noise and improves power supply rejection ratio.
• Supports long-frame and short-frame synchronous communications for PCM applications, as well as IDL and GCI modes for ISDN.
• Includes an on-chip precision voltage reference and additional power amplifier for direct load driving.

Applications

• VoIP and Voice over Networks
• Digital telephone and communication systems
• Wireless voice devices
• PABX/SOHO systems
• ISDN equipment

Procurement Notes

Verify component authenticity through authorized distributors or the manufacturer directly. Confirm that the specific SG suffix corresponds to the required package type and verify RoHS compliance status before procurement. Ensure the revision level matches the design requirements.

Selection Notes

Select this component for single-channel voiceband applications requiring low power consumption and high integration. Verify compatibility with the target system's master clock frequencies and frame sync formats. Ensure the operating voltage range aligns with the available power supply rails in the final application.

Part Context

The W681310 is part of Nuvoton's audio codec portfolio designed for voiceband processing. The SG suffix typically denotes a specific package variant within the 20-pin family, which may include SOG, SSOP, or TSSOP options. This series is engineered for cost-effective implementation in digital telephony and communication infrastructure.

Replacement Considerations

Consult official documentation for verified substitute part numbers. Cross-reference pinouts and electrical characteristics carefully when considering alternatives from other manufacturers to ensure functional compatibility.

FAQ

How is the companding format selected?

The companding format is pin-selectable via the μ/A-Law pin. Connecting this pin to VDD selects μ-Law, while connecting it to VSS selects A-Law.

What interface modes are supported?

The device supports Long Frame Sync, Short Frame Sync, General Circuit Interface (GCI), and Interchip Digital Link (IDL) modes, selectable via the BCLKR and FSR pins.

Can the power amplifier be powered down?

Yes, the transmit power amplifier can be powered down by connecting the PAI pin to VDD if it is not required for the application.