PCM69AP-J Equivalent & Substitute Parts

Part Overview

The PCM69AP-J is an 18-bit audio DAC manufactured by Texas Instruments, designed for stereo audio applications with PCM data interface support. This component operates on 5V supply and is housed in a 16-DIP through-hole package. The PCM69AP-J is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PCM69AP-J

Texas InstrumentsIn Stock: 841PCM69AP-J Datasheet

Current PartRFQ

PCM1793DB

Texas InstrumentsIn Stock: 2243PCM1793DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The PCM1793DB qualifies as a manufacturer-recommended substitute for the PCM69AP-J based on the following substitution criteria:

Functional Compatibility:

• Both components are stereo audio DACs (2 channels) manufactured by Texas Instruments
• Both support the same operating temperature range (-25°C ~ 85°C)
• Both maintain ROHS3 compliance and REACH unaffected status

Electrical Compatibility:

• The PCM1793DB accepts dual supply voltages (3V ~ 3.6V and 5V), which encompasses the PCM69AP-J's 5V requirement
• Both components are designed for audio applications with compatible analog and digital supply architecture

Substitution Limitations:

• Resolution upgrade: PCM1793DB provides 24-bit resolution versus 18-bit in the original part
• Data interface change: PCM1793DB uses I2S interface instead of PCM
• Sampling rate: PCM1793DB supports 200k sampling rate (not specified in original)
• Package change: PCM1793DB uses 28-SSOP surface mount versus 16-DIP through-hole
• Mounting type: Transition from through-hole to surface mount requires PCB redesign

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement Scenarios: The PCM1793DB is the manufacturer-recommended substitute and is actively produced, ensuring long-term availability. Both components maintain identical compliance certifications (ROHS3, REACH unaffected) and operate within the same temperature range.

Design Modification Requirements: Substitution of PCM69AP-J with PCM1793DB requires the following changes:

• PCB redesign due to package footprint change (16-DIP to 28-SSOP)
• Controller firmware modification to support I2S data interface instead of PCM
• Verification of 5V supply compatibility with the PCM1793DB's dual voltage specification

Compliance Considerations: Both components maintain equivalent regulatory compliance. The PCM1793DB's active product status provides superior long-term supply chain stability compared to the obsolete PCM69AP-J.

Frequently Asked Questions (FAQ)

Q: Can the PCM1793DB be used as a direct pin-for-pin replacement? A: No. The PCM1793DB uses a 28-SSOP surface-mount package compared to the PCM69AP-J's 16-DIP through-hole package. PCB redesign is required.

Q: What is the primary difference between PCM and I2S data interfaces? A: PCM and I2S are distinct serial audio protocols. The PCM69AP-J accepts PCM-formatted data, while the PCM1793DB requires I2S-formatted data. Controller firmware modification is necessary to support this interface change.

Q: Does the higher resolution of the PCM1793DB (24-bit vs. 18-bit) affect compatibility? A: The 24-bit resolution of the PCM1793DB is a functional upgrade that does not prevent substitution. However, the system controller must be capable of generating 24-bit audio data streams to utilize this capability.

Q: Are there supply voltage compatibility concerns? A: The PCM1793DB accepts 3V ~ 3.6V and 5V supplies. Systems currently supplying 5V to the PCM69AP-J can operate the PCM1793DB at 5V without modification to the power supply circuit.

Q: What is the inventory status of these components? A: The PCM69AP-J (obsolete) has 814 units in stock. The PCM1793DB (active) has 2220 units in stock, providing superior availability for new designs and ongoing production.

Q: Are there compliance or certification differences between these components? A: Both components are ROHS3 compliant and REACH unaffected. No compliance-related barriers exist for substitution.