TS4990ID Equivalent & Substitute Parts

Part Overview

The TS4990ID is a Class AB mono audio amplifier IC manufactured by STMicroelectronics, housed in an 8-SOIC surface mount package. This device delivers 1.2W output power at 8Ω load with a supply voltage range of 2.2V to 5.5V. The TS4990ID incorporates depop circuitry, differential inputs, standby mode, and thermal protection features suitable for portable audio applications.

The TS4990ID is classified as obsolete. Locating equivalent substitute components is necessary to support ongoing production requirements, design revisions, and inventory management for systems currently utilizing this amplifier IC.

Substiute Parts

TS4990ID

STMicroelectronicsIn Stock: 1191TS4990ID Datasheet

Current PartRFQ

TPA751D

Texas InstrumentsIn Stock: 1646TPA751D Datasheet

SimilarRFQ

TPA751DR

Texas InstrumentsIn Stock: 105319TPA751DR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the TS4990ID are identified based on the following critical parameters that determine functional and physical compatibility:

Package Compatibility: Both substitute parts utilize the 8-SOIC package with identical physical dimensions (0.154", 3.90mm Width), ensuring direct PCB footprint compatibility without layout modifications.

Amplifier Classification: All parts are Class AB mono amplifiers with differential input stages, maintaining the same signal processing architecture and input impedance characteristics.

Supply Voltage Range: The TS4990ID operates from 2.2V to 5.5V. Substitute parts operate from 2.5V to 5.5V, providing overlap within the 2.5V to 5.5V window. Applications requiring operation below 2.5V cannot use these substitutes.

Operating Temperature Range: All parts share the identical operating temperature specification of -40°C to 85°C (TA), ensuring thermal performance equivalence across the specified range.

Output Power Consideration: The TS4990ID delivers 1.2W at 8Ω, while substitute parts deliver 700mW at 8Ω. This represents a 42% reduction in maximum output power. Substitution is valid only for applications where 700mW output power is acceptable.

Regulatory Compliance: All parts are ROHS3 compliant, REACH unaffected, and share the same ECCN (EAR99) and HTSUS classifications, ensuring equivalent regulatory status.

Product Status: Substitute parts are classified as active products with established supply chains, addressing the obsolescence status of the TS4990ID.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The TPA751D and TPA751DR are functionally equivalent substitutes for the TS4990ID within the constraints of reduced output power (700mW versus 1.2W) and minimum supply voltage (2.5V versus 2.2V). Both Texas Instruments parts are active products with established supply availability, addressing the obsolescence status of the STMicroelectronics device.

Packaging Selection: TPA751D is supplied in tube packaging, while TPA751DR is supplied in tape and reel format. Selection between these two variants depends on procurement volume and assembly line requirements. Both parts are electrically identical.

Compliance Status: All three parts maintain equivalent regulatory compliance (ROHS3, REACH unaffected, EAR99 classification), ensuring no additional certification requirements for substitution.

Moisture Sensitivity Consideration: The TS4990ID carries MSL rating 3 (168 hours), while substitute parts carry MSL rating 1 (unlimited). This represents improved moisture tolerance in the substitute components, reducing handling and storage constraints.

Supply Voltage Compatibility: Applications operating at supply voltages below 2.5V cannot use the TPA751D or TPA751DR substitutes. Designs requiring operation in the 2.2V to 2.5V range must retain the TS4990ID or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the TPA751D or TPA751DR be used as a direct drop-in replacement for the TS4990ID?

A: Physical and electrical compatibility exists for PCB footprint and signal interface. However, the reduced maximum output power (700mW versus 1.2W) must be evaluated against application requirements. If the application requires output power exceeding 700mW at 8Ω load, these substitutes are not suitable.

Q: What is the impact of the reduced output power specification?

A: The TPA751D and TPA751DR deliver 42% less maximum output power than the TS4990ID. Applications designed for 1.2W output will experience reduced audio level capability. Acoustic performance and system loudness will be affected proportionally.

Q: Are there supply voltage compatibility issues?

A: The TS4990ID operates from 2.2V minimum, while substitutes operate from 2.5V minimum. Applications using supply voltages between 2.2V and 2.5V cannot use the TPA751D or TPA751DR. Designs operating at 2.5V or higher are compatible.

Q: What is the difference between TPA751D and TPA751DR?

A: Both parts are electrically identical. The difference is packaging format: TPA751D is supplied in tube packaging, while TPA751DR is supplied in tape and reel format. Selection depends on procurement volume and assembly process requirements.

Q: Do the substitute parts have improved protection features?

A: Yes. The TPA751D and TPA751DR include short-circuit protection in addition to thermal protection, whereas the TS4990ID specifies thermal protection only. This represents an enhancement in fault tolerance.

Q: Is there a moisture sensitivity difference?

A: Yes. The TS4990ID carries MSL rating 3 (168 hours), while substitutes carry MSL rating 1 (unlimited). The substitute parts have superior moisture tolerance, reducing handling and storage constraints during manufacturing.

Q: Can I use these substitutes in new designs?

A: Yes. The TPA751D and TPA751DR are active products with established supply chains. They are suitable for new designs provided output power requirements do not exceed 700mW at 8Ω load and minimum supply voltage is 2.5V or higher.

Q: What features are common across all three parts?

A: All three parts are Class AB mono amplifiers in 8-SOIC packages with differential inputs, identical operating temperature ranges (-40°C to 85°C), and equivalent regulatory compliance (ROHS3, REACH unaffected).