TAS5704PAP Equivalent & Substitute Parts

Part Overview

The TAS5704PAP is a Class D audio amplifier IC manufactured by Texas Instruments, configured as a dual-channel (stereo) or quad-channel (quad) amplifier in a 64-HTQFP surface mount package. The device delivers 20.6W per channel at 8Ω load and operates across a 10V to 26V supply voltage range. It integrates digital audio inputs via I2S protocol, mute control, short-circuit protection, thermal protection, and shutdown functionality.

The TAS5704PAP is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure continued design flexibility, maintain supply chain alternatives, and support long-term product availability for applications requiring Class D amplification with multi-channel configurations.

Substiute Parts

TAS5704PAP

Texas InstrumentsIn Stock: 837TAS5704PAP Datasheet

Current PartRFQ

TAS5805MPWPR

Texas InstrumentsIn Stock: 21430TAS5805MPWPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TAS5704PAP is evaluated based on the following critical parameters that define functional equivalence within Class D amplifier applications:

Primary Substitution Criteria:

• Amplifier topology (Class D technology)
• Digital audio interface compatibility (I2S protocol support)
• Supply voltage operating range overlap
• Output power delivery capability
• Protection feature set (thermal, short-circuit, shutdown)
• Surface mount packaging compatibility
• RoHS3 compliance and regulatory alignment

The TAS5805MPWPR is identified as a manufacturer-recommended substitute. While the TAS5805MPWPR operates in a different output configuration (1-Channel Mono or 2-Channel Stereo versus the TAS5704PAP's 2-Channel or 4-Channel capability), it maintains Class D topology, I2S digital input support, overlapping supply voltage range, and equivalent protection mechanisms. The TAS5805MPWPR is in Active product status, providing long-term availability compared to the Last Time Buy status of the TAS5704PAP.

Parameter Comparison

Engineering Selection Recommendations

TAS5704PAP (Main Part): The TAS5704PAP remains the primary selection for applications requiring quad-channel amplification or dual-channel stereo operation with the specified 20.6W output power at 8Ω. Current inventory of 774 pieces supports immediate procurement. However, Last Time Buy status indicates limited future availability. This part is suitable for existing designs with established supply agreements or applications with extended lead time flexibility.

TAS5805MPWPR (Substitute): The TAS5805MPWPR is recommended for new designs or applications where stereo (2-channel) amplification is sufficient. Active product status ensures long-term availability and supply chain stability. The TAS5805MPWPR delivers higher output power at 4Ω (45W) and equivalent power at 8Ω (23W) compared to the TAS5704PAP. Extended operating temperature range (-25°C to 85°C) provides broader environmental compatibility. Significantly higher inventory (21,400 pieces) supports immediate availability. The smaller 28-PowerTSSOP package reduces PCB footprint compared to the 64-PowerTQFP.

Both parts maintain ROHS3 compliance and equivalent regulatory status. Selection between these parts depends on channel count requirements and long-term supply chain strategy.

Frequently Asked Questions (FAQ)

Q: Can the TAS5805MPWPR directly replace the TAS5704PAP in existing designs?

A: Direct replacement requires design evaluation. The TAS5805MPWPR supports 2-channel stereo operation, matching the TAS5704PAP's stereo capability. However, applications utilizing quad-channel (4-channel) operation cannot use the TAS5805MPWPR without circuit redesign. Package differences (64-PowerTQFP versus 28-PowerTSSOP) require PCB layout modification. I2S digital interface compatibility exists on both parts, supporting protocol-level substitution for stereo applications.

Q: What are the key electrical differences between these parts?

A: The TAS5805MPWPR provides higher output power density (45W at 4Ω, 23W at 8Ω stereo) compared to the TAS5704PAP (20.6W at 8Ω stereo). The TAS5805MPWPR operates across a wider supply voltage range (4.5V to 26.4V) with extended lower temperature operation (-25°C minimum). Both maintain Class D topology and I2S digital input protocol.

Q: Are there packaging considerations for substitution?

A: Yes. The TAS5704PAP uses 64-PowerTQFP (10x10mm), while the TAS5805MPWPR uses 28-PowerTSSOP (4.40mm width). The TAS5805MPWPR package is significantly smaller, reducing PCB area requirements. Pin count differs (64 versus 28), requiring complete PCB redesign. Thermal management characteristics may differ due to package geometry; thermal analysis is necessary for high-power applications.

Q: What is the significance of Last Time Buy status for the TAS5704PAP?

A: Last Time Buy designation indicates Texas Instruments will discontinue the TAS5704PAP after current inventory depletion. No future production is planned. Existing designs using this part should evaluate migration to Active status alternatives such as the TAS5805MPWPR to ensure long-term supply chain continuity and avoid obsolescence risk.

Q: Do both parts support I2S digital audio input?

A: The TAS5704PAP explicitly includes I2S digital input capability. The TAS5805MPWPR parameter set provided does not specify I2S support in the detailed features list. Verification of digital interface compatibility is required before substitution in I2S-dependent applications.

Q: What protection features are common to both parts?

A: Both parts integrate short-circuit protection and thermal protection mechanisms. Both support shutdown functionality. The TAS5704PAP explicitly lists mute control; the TAS5805MPWPR feature set does not specify mute capability in the provided parameters.