TS4902IST Equivalent & Substitute Parts

Part Overview

The TS4902IST is a Class AB mono audio amplifier IC manufactured by STMicroelectronics, designed for low-voltage audio applications with 700mW output power at 8Ω load. The device integrates depop, standby, and thermal protection features in an 8-MiniSO surface mount package.

The TS4902IST carries an Obsolete product status. Identifying equivalent and substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this amplifier topology.

Substiute Parts

TS4902IST

STMicroelectronicsIn Stock: 1802TS4902IST Datasheet

Current PartRFQ

LM4902MM/NOPB

Texas InstrumentsIn Stock: 17839LM4902MM/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TS4902IST is determined by the following critical parameters:

Functional Compatibility Criteria:

• Amplifier topology: Class AB mono configuration
• Output power capability: minimum 675mW at 8Ω load
• Supply voltage range: compatible with 2.0V ~ 5.5V minimum
• Integrated protection features: depop and thermal protection required
• Operating temperature range: -40°C ~ 85°C

Physical Compatibility Criteria:

• Surface mount technology
• 8-pin package footprint (8-TSSOP, 8-MSOP, or 8-VSSOP)
• 0.118" (3.00mm) package width

Regulatory Compliance Criteria:

• ROHS3 compliance
• Moisture Sensitivity Level 1
• REACH Unaffected status

The LM4902MM/NOPB from Texas Instruments meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

The LM4902MM/NOPB qualifies as a direct substitute for the TS4902IST based on the following engineering criteria:

Functional Equivalence: Both devices implement Class AB mono amplifier architecture with integrated depop and thermal protection. Output power differential (700mW vs. 675mW at 8Ω) represents a 3.6% reduction within acceptable tolerance for audio amplifier applications.

Supply Voltage Compatibility: The LM4902MM/NOPB supports a lower minimum supply voltage (2.0V vs. 2.2V), providing expanded operational range while maintaining full compatibility with the TS4902IST supply envelope.

Regulatory and Compliance Alignment: Both components maintain ROHS3 compliance, MSL Level 1 rating, and REACH Unaffected status, ensuring equivalent environmental and regulatory standing.

Product Lifecycle Status: The LM4902MM/NOPB carries Active product status with confirmed inventory availability (17,778 pcs), providing supply chain continuity for the obsolete TS4902IST.

Physical Integration: Identical package footprint (8-TSSOP/8-MSOP, 0.118" width) and surface mount technology enable direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the LM4902MM/NOPB replace the TS4902IST in existing designs without PCB modification?

A: Yes. Both components utilize identical 8-pin surface mount package footprints (8-TSSOP, 8-MSOP) with 0.118" (3.00mm) width. Pin configuration and electrical interface are compatible, enabling direct substitution without PCB layout changes.

Q: What is the significance of the 25mW output power difference between these devices?

A: The TS4902IST delivers 700mW at 8Ω load, while the LM4902MM/NOPB delivers 675mW at the same load impedance. This 3.6% reduction falls within standard tolerance ranges for audio amplifier applications and does not constitute a functional limitation for equivalent audio performance.

Q: Are the standby and shutdown features functionally equivalent?

A: Both features provide low-power operational modes. Standby (TS4902IST) and Shutdown (LM4902MM/NOPB) achieve equivalent power management objectives through device deactivation. Specific control methodology should be verified against application requirements and datasheet specifications.

Q: Does the LM4902MM/NOPB support the full supply voltage range of the TS4902IST?

A: Yes. The LM4902MM/NOPB operates across 2.0V ~ 5.5V, which encompasses the TS4902IST range of 2.2V ~ 5.5V. The LM4902MM/NOPB additionally supports operation at 2.0V and 2.1V, providing expanded low-voltage capability.

Q: What packaging format differences exist between these components?

A: The TS4902IST is supplied in Cut Tape (CT) and Digi-Reel® packaging. The LM4902MM/NOPB is supplied in Tape & Reel (TR) format. Both formats are standard surface mount delivery methods; packaging selection depends on production volume and handling requirements.

Q: Are both components compliant with current environmental and regulatory standards?

A: Yes. Both the TS4902IST and LM4902MM/NOPB maintain ROHS3 compliance, MSL Level 1 rating, and REACH Unaffected status, ensuring equivalent regulatory standing for current manufacturing and distribution requirements.

Q: What is the operational temperature range for both devices?

A: Both components operate across -40°C ~ 85°C (TA), providing identical thermal performance envelope for industrial and consumer applications.