PCM69AP Equivalent & Substitute Parts

Part Overview

The PCM69AP is an 18-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for stereo audio applications with PCM data interface support. The device operates on 5V supply and is housed in a 16-DIP through-hole package. The PCM69AP is classified as obsolete, making equivalent or substitute components necessary for new designs or production continuity. Identifying suitable alternatives requires matching critical electrical parameters including resolution, channel count, data interface compatibility, and supply voltage specifications.

Substiute Parts

PCM69AP

Texas InstrumentsIn Stock: 1282PCM69AP Datasheet

Current PartRFQ

PCM1793DB

Texas InstrumentsIn Stock: 2243PCM1793DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM69AP is determined by the following critical parameters:

• Channel Configuration: Both main and substitute parts must support 2-channel stereo audio output
• Resolution Capability: Substitute must meet or exceed 18-bit resolution for audio fidelity
• Data Interface: PCM69AP uses PCM interface; substitutes with I2S interface are compatible as both are standard serial audio protocols
• Supply Voltage: PCM69AP operates at 5V; substitutes supporting 5V operation are acceptable
• Operating Temperature Range: Substitute must cover the -25°C ~ 85°C range
• Product Status: Active product status ensures ongoing availability and support

The PCM1793DB qualifies as a substitute based on these criteria: it maintains 2-channel configuration, exceeds resolution at 24-bit, supports 5V operation, covers the required temperature range, and maintains active product status.

Parameter Comparison

Engineering Selection Recommendations

The PCM1793DB is the designated manufacturer-recommended substitute for the PCM69AP. Selection of this substitute is supported by the following factors:

• Product Status Alignment: The PCM1793DB maintains active product status, ensuring long-term availability and manufacturing support compared to the obsolete PCM69AP
• Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements
• Electrical Compatibility: The PCM1793DB supports 5V operation, matching the PCM69AP supply voltage requirement, and exceeds resolution specifications at 24-bit versus 18-bit
• Temperature Range Coverage: Both components operate across the identical -25°C ~ 85°C temperature range, ensuring thermal compatibility in equivalent applications
• Functional Equivalence: Both devices are 2-channel audio DACs from the same manufacturer, maintaining functional parity for stereo audio applications

Design migration from PCM69AP to PCM1793DB requires accommodation of package and interface differences through circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the PCM1793DB directly replace the PCM69AP without circuit modifications?

A: No. While both are 2-channel audio DACs with compatible supply voltage and temperature ranges, the PCM1793DB differs in three critical aspects: package type (28-SSOP surface mount versus 16-DIP through hole), data interface (I2S versus PCM), and pin configuration. Circuit redesign is required.

Q: What is the primary reason the PCM69AP requires substitution?

A: The PCM69AP is classified as obsolete. The PCM1793DB is the manufacturer-recommended active alternative, ensuring continued component availability and manufacturing support.

Q: Does the PCM1793DB provide better audio performance than the PCM69AP?

A: The PCM1793DB provides higher resolution at 24-bit compared to the PCM69AP at 18-bit, and supports a higher sampling rate at 200k per second. Both maintain identical operating temperature ranges and regulatory compliance.

Q: Are there package considerations when selecting the PCM1793DB?

A: Yes. The PCM1793DB uses 28-SSOP surface-mount packaging versus the PCM69AP's 16-DIP through-hole package. This requires PCB layout redesign and surface-mount assembly capability.

Q: What is the difference between PCM and I2S data interfaces?

A: Both PCM and I2S are serial audio protocols. PCM69AP uses PCM interface while PCM1793DB uses I2S interface. Both are standard serial audio protocols; however, interface-specific signal timing and protocol requirements must be accommodated in the host controller design.

Q: Are both components RoHS compliant?

A: Yes. Both the PCM69AP and PCM1793DB maintain ROHS3 compliance and REACH unaffected status, meeting current environmental regulations.