PCM69AU-J Equivalent & Substitute Parts

Part Overview

The PCM69AU-J is an 18-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for audio applications requiring PCM data interface. This component operates with a 5V supply and supports 2-channel audio conversion. The PCM69AU-J is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity.

Substiute Parts

PCM69AU-J

Texas InstrumentsIn Stock: 1155PCM69AU-J Datasheet

Current PartRFQ

PCM1793DB

Texas InstrumentsIn Stock: 2243PCM1793DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM69AU-J is determined by the following critical parameters:

• Functional Category: Audio DAC with 2-channel output capability
• Resolution Compatibility: Minimum 18-bit resolution required
• Data Interface: PCM or compatible serial audio interface
• Supply Voltage: 5V operation or dual-supply compatibility including 5V
• Operating Temperature Range: -25°C ~ 85°C minimum
• Mounting Type: Surface mount configuration
• Regulatory Compliance: ROHS3 and REACH compliance maintained

The PCM1793DB qualifies as a substitute based on these parameters, despite differences in resolution, sampling rate, and package configuration, as these represent functional enhancements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The PCM1793DB is an active product from Texas Instruments and maintains full compliance with ROHS3 and REACH regulations. As the PCM69AU-J is obsolete, the PCM1793DB provides design continuity with equivalent 2-channel audio DAC functionality and identical operating temperature range. Both components are surface-mount devices with ROHS3 compliance, supporting long-term supply chain stability.

The PCM1793DB offers enhanced resolution (24-bit versus 18-bit) and dual supply voltage compatibility (3V ~ 3.6V, 5V), providing design flexibility. The data interface differs (I2S versus PCM), requiring firmware or interface logic adaptation. Package configuration changes from 20-SOIC to 28-SSOP, necessitating PCB layout revision.

Frequently Asked Questions (FAQ)

Q: Can the PCM1793DB directly replace the PCM69AU-J without design changes?

A: Direct pin-for-pin replacement is not possible due to different package configurations (20-SOIC versus 28-SSOP) and data interface protocols (PCM versus I2S). PCB layout and interface logic require modification.

Q: What are the key compatibility factors for audio DAC substitution?

A: Channel count, resolution, supply voltage compatibility, operating temperature range, and data interface protocol are the primary factors. The PCM1793DB maintains channel count and temperature range while offering enhanced resolution and expanded voltage compatibility.

Q: Does the higher resolution of the PCM1793DB affect compatibility?

A: Higher resolution (24-bit) is functionally compatible with 18-bit source material and represents a performance enhancement rather than a limitation. System firmware must support the I2S interface protocol.

Q: Are both components compliant with current regulatory standards?

A: Both the PCM69AU-J and PCM1793DB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the primary reason for substitution?

A: The PCM69AU-J is obsolete. The PCM1793DB is an active product from the same manufacturer, ensuring ongoing availability and supply chain support.