TDA7294S Equivalent & Substitute Parts

Part Overview

The TDA7294S is a Class AB linear amplifier IC manufactured by STMicroelectronics, designed for mono audio applications with 100W output power capability. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and component procurement. The TDA7294S features integrated protection mechanisms including depop, mute, short-circuit, and thermal protection functions, along with standby capability. Due to its obsolete status, sourcing alternatives from the active product portfolio is essential for new designs and production continuity.

Substiute Parts

TDA7294S

STMicroelectronicsIn Stock: 1024TDA7294S Datasheet

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TDA7293V

STMicroelectronicsIn Stock: 5434TDA7293V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TDA7294S is determined by the following critical parameters:

Core Compatibility Criteria:

• Amplifier topology: Class AB
• Channel configuration: 1-Channel (Mono)
• Package type: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Mounting method: Through Hole
• Protection feature set: Depop, Mute, Short-Circuit and Thermal Protection, Standby
• Regulatory compliance: ROHS3 Compliant

Allowable Parameter Variations:

• Supply voltage range may extend beyond the original specification
• Output power capability may differ based on load impedance
• Product status transition from obsolete to active is acceptable
• Moisture sensitivity level may improve (lower MSL value)
• Additional features beyond the base specification are permissible

The TDA7293V qualifies as a substitute based on matching core topology, channel configuration, package type, mounting method, and protection features while maintaining regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The TDA7293V is the qualified substitute for the obsolete TDA7294S based on the following engineering criteria:

Product Status Alignment: The TDA7293V maintains active product status with STMicroelectronics, ensuring continued availability and manufacturing support. This addresses the primary limitation of the TDA7294S, which is classified as obsolete.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements for equivalent component selection.

Functional Equivalence: The TDA7293V preserves the core amplifier topology (Class AB), mono channel configuration, and identical package form factor (Multiwatt-15 with vertical, bent, and staggered leads). Through-hole mounting compatibility is maintained.

Protection Feature Enhancement: The TDA7293V includes all protection mechanisms present in the TDA7294S (depop, mute, short-circuit and thermal protection, standby) with the addition of differential input capability, providing enhanced functionality without compromising existing circuit compatibility.

Supply Voltage Compatibility: The TDA7293V supply voltage range (±12V ~ 50V) encompasses the TDA7294S specification (±12V ~ 45V), ensuring compatibility with existing power supply designs.

Moisture Sensitivity Improvement: The TDA7293V demonstrates superior moisture resistance (MSL 1, Unlimited) compared to the TDA7294S (MSL 3, 168 Hours), reducing handling and storage constraints.

Frequently Asked Questions (FAQ)

Q: Can the TDA7293V be used as a direct replacement for the TDA7294S in existing designs?

A: The TDA7293V is functionally equivalent for mono Class AB amplifier applications. Both components share identical package geometry (Multiwatt-15), mounting method (through-hole), and core protection features. Circuit board layouts and pin configurations are compatible. The TDA7293V's extended supply voltage range (±12V ~ 50V) and additional differential input capability do not prevent direct substitution in designs utilizing the TDA7294S.

Q: What is the significance of the different output power ratings at different load impedances?

A: The TDA7294S specifies 100W output at 8Ohm load impedance, while the TDA7293V specifies 100W output at 4Ohm load impedance. Both components deliver equivalent power capability; the difference reflects the load impedance at which this power level is achieved. In applications using 8Ohm loads, both components deliver comparable performance. The TDA7293V's rating at 4Ohm indicates capability at lower impedance conditions.

Q: Are there any packaging or handling differences between these components?

A: Both components are supplied in tube packaging and utilize identical Multiwatt-15 package geometry. The TDA7293V exhibits improved moisture sensitivity characteristics (MSL 1 versus MSL 3), resulting in less stringent handling and storage requirements. This represents an advantage for supply chain management and long-term inventory storage.

Q: Why does the TDA7293V include differential inputs while the TDA7294S does not?

A: The TDA7293V incorporates differential input capability as an enhanced feature. This addition does not affect substitution compatibility; designs utilizing single-ended inputs on the TDA7294S can operate identically with the TDA7293V by applying input signals to the differential input stage. The differential input feature provides design flexibility for applications requiring balanced audio signal processing.

Q: What compliance certifications apply to both components?

A: Both the TDA7294S and TDA7293V maintain ROHS3 compliance and REACH unaffected status. These regulatory certifications ensure compliance with environmental and hazardous substance restrictions applicable to electronic components in regulated markets. ECCN classification (EAR99) and HTSUS code (8542.33.0001) are identical for both components.