PCM1605Y Audio DAC Equivalent & Substitute Parts

Part Overview

The PCM1605Y is a 24-bit audio digital-to-analog converter manufactured by Texas Instruments, designed for high-fidelity audio applications with I2S digital interface support. This device features 3 output channels, 200 kHz sampling rate capability, and operates across 3V–3.6V and 5V supply rails. The PCM1605Y is classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing design support and procurement.

Substiute Parts

PCM1605Y

Texas InstrumentsIn Stock: 809PCM1605Y Datasheet

Current PartRFQ

PCM1602KY

Texas InstrumentsIn Stock: 1466PCM1602KY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCM1605Y is determined by the following critical parameters:

• Resolution (Bits): 24-bit minimum requirement
• Data Interface: I2S protocol compatibility
• Voltage Supply Compatibility: Support for 3V–3.6V and/or 5V rails
• Operating Temperature Range: −25°C to +85°C minimum
• Mounting Type: Surface mount technology
• RoHS Compliance: ROHS3 Compliant status
• Base Product Family: PCM160 series

The PCM1602KY qualifies as a manufacturer-recommended substitute based on matching resolution, I2S interface, compatible voltage supplies, identical operating temperature range, surface mount packaging, and equivalent RoHS compliance within the PCM160 product family.

Parameter Comparison

Engineering Selection Recommendations

The PCM1602KY is designated as the manufacturer-recommended substitute for the PCM1605Y. Both devices maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring equivalent environmental and regulatory compatibility. The PCM1602KY provides enhanced functionality through 6 output channels versus 3 channels on the PCM1605Y, while maintaining 24-bit resolution and I2S interface protocol. The sampling rate differential (192 kHz versus 200 kHz) and package footprint reduction (48-LQFP 7×7 mm versus 48-BQFP 12×12 mm) represent design trade-offs that must be evaluated against specific application requirements. Both devices support identical supply voltage ranges and operating temperature specifications, confirming electrical compatibility within the specified environmental envelope.

Frequently Asked Questions (FAQ)

Q: Can the PCM1602KY directly replace the PCM1605Y in existing designs?

A: Direct replacement requires verification of three factors: (1) PCB layout accommodation of the smaller 48-LQFP (7×7 mm) package versus the original 48-BQFP (12×12 mm) footprint, (2) application tolerance for 192 kHz maximum sampling rate versus the original 200 kHz specification, and (3) utilization of the additional 6 output channels provided by the PCM1602KY or confirmation that excess channels can be left unconnected.

Q: Are the I2S interface pin configurations identical between these devices?

A: Both devices implement I2S digital interface protocol. Pin-level compatibility must be confirmed through detailed datasheet comparison, as package geometry differences may result in alternative pinout arrangements despite functional interface equivalence.

Q: What is the significance of the package change from 48-BQFP to 48-LQFP?

A: The transition from 48-BQFP (12×12 mm) to 48-LQFP (7×7 mm) represents a reduction in board footprint and component height. This change requires PCB redesign and may impact thermal management characteristics due to altered package geometry.

Q: Do both devices meet the same compliance and regulatory requirements?

A: Yes. Both the PCM1605Y and PCM1602KY are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1, Unlimited), confirming equivalent regulatory and environmental compliance status.

Q: Why is the PCM1602KY listed as discontinued at DiGi Electronics if it is the recommended substitute?

A: Manufacturer recommendation and distributor availability are independent factors. The PCM1602KY remains the designated functional equivalent within the PCM160 product family despite current discontinuation status at specific distributors. Availability should be verified through alternative authorized Texas Instruments distributors.