STA500 Equivalent & Substitute Parts

Part Overview

The STMicroelectronics STA500 is a Class D amplifier IC designed for 2-channel (stereo) or 4-channel (quad) audio applications, delivering 60W per channel at 8Ω load impedance. The device integrates short-circuit and thermal protection features and operates across a 10V to 36V supply voltage range. The STA500 is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the core amplifier topology, channel configuration, and protection features while accommodating variations in output power, supply voltage range, and operating temperature specifications.

Substiute Parts

STA500

STMicroelectronicsIn Stock: 3004STA500 Datasheet

Current PartRFQ

D2-24044-MR

Renesas Electronics CorporationIn Stock: 3216D2-24044-MR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STA500 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Amplifier topology: Class D architecture
• Channel configuration: 2-channel (stereo) or 4-channel (quad) capability
• Protection features: Short-circuit and thermal protection integration
• Mounting technology: Surface mount assembly

Electrical Performance Parameters:

• Output power per channel at 8Ω load impedance
• Supply voltage operating range
• Operating temperature range

Regulatory & Environmental Compliance:

• RoHS3 compliance status
• REACH compliance status
• Moisture sensitivity level (MSL) rating

The Renesas Electronics Corporation D2-24044-MR qualifies as a substitute based on matching Class D topology, dual/quad channel configuration, and integrated protection features. However, this substitute operates at reduced maximum output power (30W versus 60W per channel) and operates within a narrower supply voltage range (9V ~ 26V versus 10V ~ 36V). The substitute features an extended operating temperature range (-10°C ~ 85°C) and maintains equivalent regulatory compliance (ROHS3, REACH Unaffected).

Parameter Comparison

Engineering Selection Recommendations

STA500 (STMicroelectronics) - Obsolete Status: The STA500 is classified as obsolete and no longer in active production. While inventory remains available (2949 pcs), this part number should not be selected for new designs or long-term production commitments. Existing designs utilizing the STA500 require migration planning to active alternatives.

D2-24044-MR (Renesas Electronics) - Active Status: The D2-24044-MR is an active product with current manufacturing support and established supply chain availability (3153 pcs in stock). This substitute maintains ROHS3 and REACH compliance equivalent to the STA500. The D2-24044-MR is suitable for applications where the reduced output power specification (30W per channel at 8Ω versus 60W) and narrower supply voltage range (9V ~ 26V versus 10V ~ 36V) align with system requirements. The extended operating temperature range (-10°C ~ 85°C) provides broader environmental operating capability compared to the STA500 (0°C ~ 70°C).

Selection of the D2-24044-MR requires circuit-level validation to confirm that the 50% reduction in maximum output power per channel and the modified supply voltage operating window are compatible with the target application's power delivery and voltage regulation architecture.

Frequently Asked Questions (FAQ)

Q: Can the D2-24044-MR directly replace the STA500 in existing PCB designs?

A: Direct PCB replacement is not possible due to package differences. The STA500 uses PowerSO-36 packaging with an exposed bottom pad, while the D2-24044-MR uses 38-HTSSOP (0.173", 4.40mm Width) packaging. PCB layout redesign and re-qualification are required for any substitution.

Q: What is the impact of the reduced output power specification in the D2-24044-MR?

A: The D2-24044-MR delivers 30W per channel at 8Ω load impedance, compared to 60W per channel for the STA500. This 50% reduction in maximum output power directly affects the audio system's maximum sound pressure level capability. Applications requiring the full 60W per channel output cannot use the D2-24044-MR without system redesign.

Q: Are there supply voltage compatibility issues between the STA500 and D2-24044-MR?

A: Yes. The STA500 operates across 10V ~ 36V, while the D2-24044-MR operates across 9V ~ 26V. Systems designed for the STA500's extended upper voltage limit (36V) cannot use the D2-24044-MR without power supply circuit modification. The D2-24044-MR supports operation at 9V, providing a 1V lower minimum threshold.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the STA500 and D2-24044-MR are ROHS3 compliant and REACH unaffected. Regulatory compliance is equivalent between the two parts.

Q: What is the difference in operating temperature ranges?

A: The STA500 operates across 0°C ~ 70°C (TA), while the D2-24044-MR operates across -10°C ~ 85°C (TA). The D2-24044-MR provides extended low-temperature operation (-10°C versus 0°C) and extended high-temperature operation (85°C versus 70°C), making it suitable for broader environmental applications.

Q: Why is the STA500 classified as obsolete?

A: The STA500 is no longer in active production by STMicroelectronics. While existing inventory remains available, the manufacturer has discontinued development and support for this part number. New designs should not incorporate the STA500 due to long-term supply uncertainty and lack of ongoing technical support.

Q: What is the moisture sensitivity level (MSL) difference between these parts?

A: The STA500 has MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling. The D2-24044-MR has MSL 3 (168 Hours), requiring controlled humidity storage and limiting the time the component can be exposed to ambient conditions before soldering. This affects component handling procedures and storage infrastructure requirements.

Q: Can the D2-24044-MR be used in applications requiring the full 36V supply voltage?

A: No. The D2-24044-MR maximum supply voltage is 26V. Applications designed for 36V operation require either power supply redesign to operate within the 9V ~ 26V range or selection of an alternative amplifier IC with higher voltage rating.