PCM69APG4 Equivalent & Substitute Parts

Part Overview

The PCM69APG4 is an 18-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for audio applications requiring PCM data interface support. This component operates with dual-channel output and is housed in a 16-DIP through-hole package. The PCM69APG4 is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations.

Substiute Parts

PCM69APG4

Texas InstrumentsIn Stock: 719PCM69APG4 Datasheet

Current PartRFQ

PCM1793DB

Texas InstrumentsIn Stock: 2243PCM1793DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The PCM1793DB qualifies as a functional substitute for the PCM69APG4 based on the following criteria:

Shared Core Characteristics:

• Manufacturer: Texas Instruments (same source)
• Product Category: Data Acquisition / Audio DAC
• Number of Channels: 2 (dual-channel output maintained)
• Operating Temperature Range: -25°C ~ 85°C (identical)
• Voltage Supply Source: Analog and Digital (compatible supply architecture)
• RoHS Status: ROHS3 Compliant (regulatory alignment)
• REACH Status: REACH Unaffected (compliance maintained)

Substitution Basis: The PCM1793DB represents an active-production alternative with enhanced specifications. While the data interface differs (I2S vs. PCM) and resolution increases (24-bit vs. 18-bit), the component maintains dual-channel audio DAC functionality with compatible supply voltage options (3V–3.6V, 5V) and identical operating temperature range. The PCM1793DB's active product status and higher resolution provide forward compatibility for audio DAC applications.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Component Replacement: The PCM69APG4 is classified as obsolete. The PCM1793DB is the Texas Instruments recommended substitute, maintaining active production status and full regulatory compliance (ROHS3, REACH Unaffected). Both components share identical operating temperature specifications and dual-channel audio DAC architecture.

Design Considerations:

• Mounting transition required: PCM69APG4 uses through-hole (16-DIP), while PCM1793DB uses surface-mount (28-SSOP)
• Data interface change: PCM69APG4 uses PCM protocol; PCM1793DB uses I2S protocol
• Resolution upgrade: PCM1793DB provides 24-bit resolution versus 18-bit in the original component
• Supply voltage flexibility: PCM1793DB supports 3V–3.6V and 5V operation

Compliance Status: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system support.

Frequently Asked Questions (FAQ)

Q: Can the PCM1793DB directly replace the PCM69APG4 in existing designs? A: Direct pin-for-pin replacement is not possible due to package differences (16-DIP vs. 28-SSOP) and data interface protocol changes (PCM vs. I2S). Circuit redesign and firmware modification are required.

Q: What is the primary reason for substitution? A: The PCM69APG4 is obsolete. The PCM1793DB is the active-production Texas Instruments alternative for audio DAC applications.

Q: Are there supply voltage compatibility concerns? A: The PCM69APG4 operates at 5V. The PCM1793DB supports 3V–3.6V and 5V operation, providing broader supply flexibility while maintaining 5V compatibility.

Q: How do the resolution specifications compare? A: The PCM69APG4 provides 18-bit resolution; the PCM1793DB provides 24-bit resolution. The higher resolution of the substitute component is compatible with applications designed for the original 18-bit specification.

Q: What packaging changes must be accommodated? A: The PCM69APG4 uses through-hole mounting (16-DIP package). The PCM1793DB uses surface-mount technology (28-SSOP package). PCB layout and assembly process modifications are necessary.

Q: Do both components share the same operating temperature range? A: Yes. Both the PCM69APG4 and PCM1793DB operate across -25°C to 85°C, ensuring thermal compatibility.

Q: What is the data interface difference? A: The PCM69APG4 uses PCM (Pulse Code Modulation) data interface. The PCM1793DB uses I2S (Inter-IC Sound) protocol. System firmware and signal routing must be adapted accordingly.