WAU8812RG Equivalent & Substitute Parts

Part Overview

The WAU8812RG is an audio codec interface IC manufactured by Nuvoton Technology Corporation, designed for speaker driver applications in a 28-SSOP surface mount package. This part is classified as Obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The WAU8812RG operates with separate analog (2.5V ~ 3.6V) and digital (1.71V ~ 1.95V) supply voltages and delivers 91 dB S/N ratio on the ADC and 93 dB on the DAC.

Substiute Parts

WAU8812RG

Nuvoton Technology CorporationIn Stock: 61867WAU8812RG Datasheet

Current PartRFQ

NAU8812RG

Nuvoton Technology CorporationIn Stock: 2349NAU8812RG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WAU8812RG is based on the following critical parameters that must remain compatible:

• Package / Case: Both parts must use 28-SSOP (0.209", 5.30mm Width) for PCB layout compatibility
• Mounting Type: Surface Mount requirement must be maintained
• Number of ADCs / DACs: 1 ADC and 1 DAC configuration
• S/N Ratio Performance: ADC 91 dB and DAC 93 dB typical values
• Analog Supply Voltage: 2.5V ~ 3.6V range
• Operating Temperature Range: -40°C ~ 85°C
• Manufacturer: Nuvoton Technology Corporation (same design family)
• RoHS and Compliance: ROHS3 Compliant, REACH Unaffected status

The NAU8812RG qualifies as a direct substitute based on these parameters. While the NAU8812RG features an I2S data interface (versus Serial on the WAU8812RG) and extended digital supply voltage range (1.71V ~ 3.6V), it maintains all critical electrical and mechanical compatibility requirements. The NAU8812RG is Active status, ensuring ongoing availability and support.

Parameter Comparison

Engineering Selection Recommendations

The NAU8812RG is the manufacturer-recommended substitute for the obsolete WAU8812RG. Selection of the NAU8812RG is justified on the following basis:

• Product Status: The NAU8812RG maintains Active status with ongoing manufacturer support, whereas the WAU8812RG is Obsolete and subject to discontinuation
• Compliance Alignment: Both parts maintain ROHS3 Compliance and REACH Unaffected status, ensuring regulatory continuity
• Electrical Compatibility: Identical S/N ratio performance (91 dB ADC / 93 dB DAC), analog supply voltage range (2.5V ~ 3.6V), and operating temperature range (-40°C ~ 85°C)
• Mechanical Compatibility: Identical 28-SSOP package and surface mount configuration ensure direct PCB layout compatibility without redesign
• Supply Chain Continuity: Current inventory of 2,300 units available versus obsolete status of the WAU8812RG

The primary design consideration is the data interface change from Serial (WAU8812RG) to I2S (NAU8812RG). This requires firmware or control logic modification to accommodate the I2S protocol, but does not affect analog signal path performance or power supply requirements.

Frequently Asked Questions (FAQ)

Q: Can the NAU8812RG be used as a direct pin-for-pin replacement for the WAU8812RG?

A: The NAU8812RG shares the identical 28-SSOP package footprint and pin count, enabling direct PCB placement without layout modification. However, the data interface protocol differs (Serial versus I2S), requiring corresponding changes to the host controller firmware or digital interface logic.

Q: What are the key differences between the WAU8812RG and NAU8812RG?

A: The primary differences are: (1) Data Interface—WAU8812RG uses Serial protocol while NAU8812RG uses I2S; (2) Sigma Delta Architecture—NAU8812RG incorporates Sigma Delta conversion while WAU8812RG does not; (3) Digital Supply Voltage Range—NAU8812RG extends to 3.6V maximum versus 1.95V for WAU8812RG; (4) Product Status—NAU8812RG is Active while WAU8812RG is Obsolete. Audio performance metrics (S/N ratio, operating temperature, analog supply voltage) remain identical.

Q: Are there any supply voltage compatibility issues when substituting the NAU8812RG?

A: The analog supply voltage range (2.5V ~ 3.6V) is identical for both parts. The digital supply voltage range for the NAU8812RG (1.71V ~ 3.6V) encompasses the WAU8812RG range (1.71V ~ 1.95V), providing greater flexibility. Existing power supply designs for the WAU8812RG will operate the NAU8812RG without modification.

Q: Does the NAU8812RG maintain the same moisture sensitivity and handling requirements?

A: Yes. Both parts specify MSL 3 (168 Hours), requiring identical moisture control procedures during storage, handling, and assembly. No changes to component storage or reflow processes are necessary.

Q: What is the impact of the I2S interface change on system design?

A: The I2S protocol change requires modification to the digital interface firmware or control logic that communicates with the audio codec. The analog signal path, power supply requirements, and PCB layout remain compatible. Detailed protocol specifications should be reviewed in the respective datasheets to ensure host controller compatibility.