TS4890IDT Equivalent & Substitute Parts

Part Overview

The TS4890IDT is a Class AB audio amplifier IC manufactured by STMicroelectronics, designed for mono audio applications with 1W output power at 8Ω load impedance. This device integrates depop, standby, and thermal protection features in an 8-SOIC surface mount package. The TS4890IDT is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across electrical specifications, mechanical packaging, and regulatory compliance standards.

Substiute Parts

TS4890IDT

STMicroelectronicsIn Stock: 32031TS4890IDT Datasheet

Current PartRFQ

TS4990IDT

STMicroelectronicsIn Stock: 3479TS4990IDT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TS4890IDT is determined by the following critical parameters:

Package Compatibility: The substitute part must utilize the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB layout compatibility and assembly process alignment.

Amplifier Classification: The substitute must be a Class AB mono audio amplifier IC to maintain equivalent operational characteristics and thermal behavior.

Output Power Capability: The substitute must deliver a minimum of 1W output power at 8Ω load impedance. Enhanced output power specifications are acceptable as they provide functional equivalence with improved performance margin.

Supply Voltage Range: The substitute must operate within or encompass the 2.5V ~ 5.5V supply voltage window. Expanded voltage ranges are acceptable.

Integrated Protection Features: The substitute must include depop, standby, and thermal protection functionality to maintain system-level reliability and audio quality standards.

Regulatory Compliance: The substitute must maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status to satisfy manufacturing and environmental requirements.

Manufacturer Continuity: STMicroelectronics substitutes are prioritized to maintain design ecosystem consistency and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The TS4990IDT is the qualified substitute for the obsolete TS4890IDT based on the following engineering criteria:

Product Status Alignment: The TS4990IDT maintains active product status with STMicroelectronics, ensuring long-term availability, technical support, and supply chain continuity. The TS4890IDT obsolescence status creates supply risk for ongoing production and field service applications.

Regulatory Compliance Continuity: Both components maintain identical ROHS3 compliance, MSL 1 rating, and REACH unaffected status, satisfying manufacturing and environmental regulatory requirements without modification to procurement or assembly processes.

Electrical Parameter Compatibility: The TS4990IDT encompasses the TS4890IDT supply voltage range (2.2V ~ 5.5V vs. 2.5V ~ 5.5V) and delivers enhanced output power (1.2W vs. 1W at 8Ω), providing functional equivalence with improved performance margin. The expanded feature set including differential inputs adds design flexibility without compromising backward compatibility.

Mechanical Package Equivalence: Identical 8-SOIC package specifications ensure direct PCB layout compatibility and assembly process alignment without design modification.

Feature Parity: Both components integrate depop, standby, and thermal protection. The TS4990IDT adds differential input capability, which does not conflict with single-ended input applications.

Frequently Asked Questions (FAQ)

Q: Can the TS4990IDT directly replace the TS4890IDT on existing PCBs?

A: Yes. Both components utilize identical 8-SOIC (0.154", 3.90mm Width) surface mount packages with matching pinout configurations. No PCB layout modification is required for mechanical substitution.

Q: What are the electrical differences between these components?

A: The TS4990IDT provides 1.2W output power at 8Ω compared to 1W for the TS4890IDT. The TS4990IDT supply voltage range extends to 2.2V minimum versus 2.5V for the TS4890IDT. The TS4990IDT includes differential input capability in addition to the shared depop, standby, and thermal protection features.

Q: Are there regulatory compliance differences?

A: No. Both components maintain identical ROHS3 compliance, MSL 1 rating, and REACH unaffected status. No compliance documentation changes are required for substitution.

Q: Why is the TS4890IDT classified as obsolete?

A: The TS4890IDT is designated obsolete by STMicroelectronics. The TS4990IDT represents the active product line continuation with enhanced specifications and ongoing manufacturer support.

Q: Does the TS4990IDT's higher output power affect thermal design?

A: The TS4990IDT integrates thermal protection equivalent to the TS4890IDT. Enhanced output power capability does not mandate thermal design modification for applications operating within the 1W power envelope of the original design.

Q: Are the operating temperature ranges identical?

A: Yes. Both components operate across -40°C ~ 85°C (TA), maintaining identical thermal performance specifications.

Q: What is the significance of differential inputs on the TS4990IDT?

A: The TS4990IDT differential input feature provides design flexibility for noise rejection in single-ended applications. Existing single-ended input designs remain fully compatible without modification.