PCM1702U-JE6 Equivalent & Substitute Parts

Part Overview

The PCM1702U-JE6 is a 20-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for serial audio applications with a 44.1 kHz sampling rate. This component operates on dual ±5V supply and is housed in a 20-SOIC surface mount package. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PCM1702U-JE6

Texas InstrumentsIn Stock: 1175PCM1702U-JE6 Datasheet

Current PartRFQ

PCM1795DB

Texas InstrumentsIn Stock: 2193PCM1795DB Datasheet

MFR RecommendedRFQ

PCM1795DBR

Texas InstrumentsIn Stock: 15616PCM1795DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the PCM1702U-JE6 are identified based on functional compatibility within the audio DAC category. The primary substitutes—PCM1795DB and PCM1795DBR—share the following critical parameters with the original part:

• Dual-channel audio DAC architecture
• Surface mount technology
• Texas Instruments manufacture
• Operating temperature range of -25°C to 85°C
• ROHS3 compliance and REACH unaffected status
• Same HTSUS classification (8542.39.0001)

The PCM1795 series represents an enhanced evolution of the PCM1702 platform, offering increased resolution (32 bits versus 20 bits) and higher sampling rate capability (200 kHz versus 44.1 kHz). Both substitute parts maintain compatibility with the original supply voltage specifications through dual supply options (3V to 3.6V and 5V).

Parameter Comparison

Engineering Selection Recommendations

The PCM1702U-JE6 is classified as obsolete, necessitating component substitution for new production and ongoing system support. Both PCM1795DB and PCM1795DBR are active products from Texas Instruments and maintain full ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original part.

PCM1795DB is supplied in tube packaging, while PCM1795DBR is supplied in cut tape and Digi-Reel format. Both variants are functionally identical and differ only in packaging and distribution method. Selection between these two should be based on procurement volume and assembly line requirements.

The package transition from 20-SOIC to 28-SSOP requires PCB layout modification. Both substitute parts maintain the same 0.209" (5.30mm) width specification, facilitating footprint adaptation. The improved moisture sensitivity level (MSL 1 versus MSL 2) provides extended shelf life and reduced handling constraints.

Frequently Asked Questions (FAQ)

Q: Can PCM1795DB and PCM1795DBR be used interchangeably?

A: Yes. Both parts are functionally identical audio DACs with the same electrical specifications. The difference is packaging format: PCM1795DB uses tube packaging, while PCM1795DBR uses cut tape and Digi-Reel format. Selection depends on procurement volume and assembly process requirements.

Q: What is the primary difference between PCM1702U-JE6 and PCM1795 series?

A: The PCM1795 series offers higher resolution (32 bits versus 20 bits) and higher sampling rate capability (200 kHz versus 44.1 kHz). Both support dual-channel audio output and maintain compatible operating temperature ranges. The PCM1795 also supports both DSD and PCM data interfaces, compared to serial interface only on the PCM1702U-JE6.

Q: Does the package change from 20-SOIC to 28-SSOP affect compatibility?

A: Yes, a PCB layout redesign is required. The 28-SSOP package has a different pin count and footprint than the 20-SOIC. Both maintain the same 0.209" width, but the increased pin count necessitates new PCB artwork and assembly procedures.

Q: Are supply voltage requirements compatible?

A: The PCM1702U-JE6 requires ±5V dual supply. The PCM1795 series accepts 3V to 3.6V and 5V supplies with separate analog and digital supply pins. Existing ±5V supply designs can be adapted to the PCM1795 series, though optimization to lower voltage operation is possible.

Q: What is the inventory status for substitute parts?

A: PCM1795DB has 2,100 units in stock. PCM1795DBR has 15,599 units in stock. Both are active products with ongoing availability.

Q: How does the moisture sensitivity level change affect handling?

A: The PCM1702U-JE6 has MSL 2 (1 year shelf life), while PCM1795 parts have MSL 1 (unlimited shelf life). This improvement reduces moisture-related failures and extends storage duration without baking requirements.