PCM1771RGAR Equivalent & Substitute Parts

Part Overview

The PCM1771RGAR is a 24-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for audio applications requiring high-resolution conversion at 50 kHz sampling rate. The device operates from a single supply voltage between 1.6V and 3.6V and is housed in a 20-pin VQFN package. The PCM1771RGAR is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PCM1771RGAR

Texas InstrumentsIn Stock: 658PCM1771RGAR Datasheet

Current PartRFQ

PCM1771RGA

Texas InstrumentsIn Stock: 1954PCM1771RGA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM1771RGAR is determined by the following critical parameters that must remain consistent:

• Resolution (Bits): 24-bit conversion capability
• Sampling Rate (Per Second): 50 kHz operation
• Data Interface: I2S protocol compatibility
• Voltage Supply Source: Single supply operation within 1.6V to 3.6V range
• Operating Temperature Range: -25°C to 85°C
• Package / Case: 20-VQFN (4.2x4.2 mm) form factor
• Mounting Type: Surface Mount technology
• Compliance Standards: ROHS3 Compliant, REACH Unaffected

The PCM1771RGA is identified as a manufacturer-recommended substitute. While the PCM1771RGA maintains identical electrical specifications for resolution, sampling rate, data interface, supply voltage, operating temperature, package type, and compliance certifications, it differs in channel configuration (1 channel versus 2 channels in the original part) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The PCM1771RGA is the manufacturer-recommended substitute for the obsolete PCM1771RGAR. Both components maintain identical electrical and thermal specifications, including 24-bit resolution, 50 kHz sampling rate, I2S data interface, single supply voltage operation (1.6V to 3.6V), and -25°C to 85°C operating temperature range. Both are housed in the same 20-VQFN (4.2x4.2 mm) surface mount package and meet ROHS3 compliance and REACH requirements.

The primary distinction is the channel configuration: the PCM1771RGAR provides 2-channel output, while the PCM1771RGA provides 1-channel output. The PCM1771RGA holds Active product status, ensuring continued availability and manufacturer support, whereas the PCM1771RGAR is classified as Obsolete.

For applications requiring 2-channel audio DAC functionality with the specified electrical parameters, the PCM1771RGA is suitable only if system architecture can accommodate single-channel operation or if dual single-channel devices can be implemented in parallel. For applications strictly requiring 2-channel integrated operation, alternative 2-channel audio DAC solutions from the PCM177 base product family should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the PCM1771RGA directly replace the PCM1771RGAR in all applications?

A: The PCM1771RGA is electrically and thermally compatible with the PCM1771RGAR for all specified parameters including resolution, sampling rate, data interface, supply voltage, operating temperature, and package type. However, the PCM1771RGA provides 1-channel output versus the 2-channel output of the PCM1771RGAR. Direct replacement is possible only in applications that require single-channel operation or where dual single-channel configurations are acceptable.

Q: What is the significance of the product status difference?

A: The PCM1771RGAR is classified as Obsolete, indicating it is no longer manufactured or supported by Texas Instruments. The PCM1771RGA is classified as Active, meaning it is currently manufactured and supported. For new designs and ongoing system support, the Active product status of the PCM1771RGA provides assurance of continued availability and manufacturer technical support.

Q: Are the package dimensions and mounting requirements identical?

A: Yes. Both the PCM1771RGAR and PCM1771RGA are housed in a 20-VQFN (4.2x4.2 mm) surface mount package. PCB layout, footprint, and reflow soldering parameters are identical between the two components.

Q: Do both components meet the same compliance standards?

A: Yes. Both the PCM1771RGAR and PCM1771RGA are ROHS3 Compliant and REACH Unaffected. Both have a Moisture Sensitivity Level of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: What is the inventory status of these components?

A: The PCM1771RGAR has 636 pieces available as new original stock. The PCM1771RGA has 1900 pieces available as new original stock in Tray packaging. The higher inventory level of the PCM1771RGA reflects its Active product status.