PCM1606E Equivalent & Substitute Parts

Part Overview

The PCM1606E is a 24-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for audio applications requiring 6-channel output with a 200 kHz sampling rate and I2S data interface. The device operates from a single 5V supply and is housed in a 20-SSOP surface mount package.

The PCM1606E has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

PCM1606E

Texas InstrumentsIn Stock: 2141PCM1606E Datasheet

Current PartRFQ

PCM1681PWP

Texas InstrumentsIn Stock: 1434PCM1681PWP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM1606E is determined by the following critical parameters:

• Resolution and Audio Capability: Both the main part and substitute must support 24-bit audio DAC functionality
• Data Interface Compatibility: The substitute must support I2S protocol to maintain signal compatibility with existing designs
• Channel Configuration: The substitute must provide sufficient output channels for the application
• Supply Voltage: The substitute must operate within compatible voltage ranges or support the required supply voltage through design modification
• Sampling Rate: The substitute must support the required sampling frequency or higher
• Package and Mounting: Surface mount technology must be maintained for PCB integration compatibility
• Compliance Standards: RoHS3 compliance and REACH status must be maintained

The PCM1681PWP is identified as a manufacturer-recommended substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

The PCM1681PWP is the manufacturer-recommended substitute for the obsolete PCM1606E. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

Key considerations for selection:

• Active Product Status: The PCM1681PWP is an active product with ongoing manufacturer support and availability, addressing the supply discontinuation of the PCM1606E
• Enhanced Specifications: The substitute provides 8 channels versus 6 channels, supporting expanded audio output requirements
• Sampling Rate: The PCM1681PWP operates at 192 kHz, which is compatible with the PCM1606E's 200 kHz specification for most audio applications
• Supply Voltage Flexibility: The PCM1681PWP supports both 3V–3.6V and 5V supplies, providing design flexibility compared to the single 5V requirement of the PCM1606E
• Extended Temperature Range: Operating range of -40°C to 85°C exceeds the PCM1606E specification
• Package Differences: The PCM1681PWP uses a 28-PowerTSSOP package versus the 20-SSOP package of the PCM1606E, requiring PCB layout modification
• Moisture Sensitivity: The PCM1681PWP has MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the PCM1606E, requiring appropriate handling and storage protocols

Frequently Asked Questions (FAQ)

Q: Can the PCM1681PWP directly replace the PCM1606E without PCB modifications?

A: No. The PCM1681PWP uses a 28-PowerTSSOP package while the PCM1606E uses a 20-SSOP package. PCB layout redesign is required to accommodate the different pin count and package footprint.

Q: Are the data interfaces compatible between these devices?

A: Yes. Both devices support I2S protocol. The PCM1681PWP additionally supports DSP interface, providing expanded protocol options.

Q: What is the impact of the 192 kHz versus 200 kHz sampling rate difference?

A: The PCM1681PWP's 192 kHz sampling rate is compatible with standard audio applications. Applications requiring exactly 200 kHz sampling must evaluate whether 192 kHz meets functional requirements.

Q: How does the increased channel count affect system design?

A: The PCM1681PWP provides 8 channels compared to 6 channels in the PCM1606E. Systems can utilize the additional 2 channels for expanded audio output or leave them unused if not required.

Q: What supply voltage should be used for the PCM1681PWP?

A: The PCM1681PWP supports 3V–3.6V or 5V supplies. For designs currently using 5V, the 5V supply option maintains compatibility. Designs can alternatively adopt 3V–3.6V supplies if system architecture permits.

Q: Does the moisture sensitivity difference require special handling?

A: Yes. The PCM1681PWP has MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the PCM1606E. The substitute requires controlled storage conditions and has a limited floor life of 168 hours after moisture exposure, necessitating appropriate component handling and storage protocols.

Q: Are both devices RoHS and REACH compliant?

A: Yes. Both the PCM1606E and PCM1681PWP are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance for electronic component applications.