PCM1604Y Equivalent & Substitute Parts

Part Overview

The PCM1604Y is a 24-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for audio applications requiring high-resolution conversion at sampling rates up to 200 kHz. The device features 3 output channels, I2S digital interface, and operates from dual supply voltages (3V–3.6V and 5V). The PCM1604Y is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PCM1604Y

Texas InstrumentsIn Stock: 57171PCM1604Y Datasheet

Current PartRFQ

PCM1602APT

Texas InstrumentsIn Stock: 1094PCM1602APT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM1604Y is determined by the following critical parameters:

• Package Compatibility: Both the main part and substitute must use the 48-LQFP (7×7 mm) surface-mount package to ensure PCB layout and assembly compatibility.
• Digital Interface: I2S interface requirement must be maintained for signal protocol compatibility.
• Resolution: 24-bit resolution is a core functional requirement.
• Supply Voltage: Dual supply operation (3V–3.6V and 5V) must be supported.
• Operating Temperature Range: −25°C to +85°C range must be met or exceeded.
• Regulatory Compliance: RoHS3 and REACH compliance status must be equivalent or superior.

The PCM1602APT qualifies as a direct substitute based on these parameters. While the PCM1602APT supports a higher sampling rate (192 kHz versus 200 kHz) and provides 6 channels instead of 3, these represent functional enhancements rather than incompatibilities. The substitute maintains identical package geometry, I2S interface, 24-bit resolution, dual supply voltage support, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The PCM1602APT is the designated substitute for the obsolete PCM1604Y based on the following engineering criteria:

• Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring equivalent environmental and regulatory standing.
• Product Status: The PCM1602APT is classified as active, providing assured long-term availability and supply chain continuity compared to the obsolete PCM1604Y.
• Package and Interface Compatibility: Identical 48-LQFP package geometry and I2S interface ensure direct PCB compatibility without layout modifications.
• Electrical Specifications: Matching 24-bit resolution, dual supply voltage support (3V–3.6V and 5V), and operating temperature range (−25°C to +85°C) guarantee functional equivalence in existing circuit designs.
• Enhanced Capability: The PCM1602APT provides 6 output channels and 192 kHz sampling rate, representing functional enhancements that do not compromise backward compatibility with designs specified for the PCM1604Y.

Frequently Asked Questions (FAQ)

Q: Can the PCM1602APT be used as a direct replacement for the PCM1604Y in existing designs?

A: Yes. The PCM1602APT maintains identical package geometry (48-LQFP), I2S digital interface, 24-bit resolution, dual supply voltage support, and operating temperature range. No PCB layout modifications are required.

Q: What is the difference in sampling rate between these parts?

A: The PCM1604Y supports up to 200 kHz sampling rate, while the PCM1602APT supports up to 192 kHz. Both rates exceed standard audio application requirements (48 kHz, 96 kHz). The PCM1602APT is suitable for applications not requiring the maximum 200 kHz specification.

Q: Why does the PCM1602APT have 6 channels instead of 3?

A: The PCM1602APT is a higher-channel-count variant within the same product family. Designs using only 3 channels can utilize the substitute without modification; the additional 3 channels remain unused. This represents a functional enhancement rather than an incompatibility.

Q: Are the supply voltage requirements identical?

A: Yes. Both the PCM1604Y and PCM1602APT require dual supply voltages of 3V–3.6V and 5V, with identical operating temperature range (−25°C to +85°C).

Q: What is the moisture sensitivity level for both parts?

A: Both parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the PCM1604Y and PCM1602APT are ROHS3 compliant and REACH unaffected, meeting equivalent environmental standards.