TS486IST Equivalent & Substitute Parts

Part Overview

The TS486IST is a Class AB stereo headphone amplifier IC manufactured by STMicroelectronics in an 8-MiniSO surface mount package. This device delivers 108mW per channel at 16Ω load across a 2V to 5.5V supply range and integrates depop, short-circuit protection, and standby features. The TS486IST is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements.

Substiute Parts

TS486IST

STMicroelectronicsIn Stock: 19951TS486IST Datasheet

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LM4809MM/NOPB

National SemiconductorIn Stock: 4542LM4809MM/NOPB Datasheet

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LM4809MMX/NOPB

Texas InstrumentsIn Stock: 5918LM4809MMX/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TS486IST is determined by equivalence across the following critical parameters: amplifier classification (Class AB), stereo headphone output configuration, supply voltage compatibility (2V ~ 5.5V), operating temperature range (-40°C ~ 85°C), surface mount technology, and package footprint (8-TSSOP/8-MSOP). The substitute parts LM4809MM/NOPB and LM4809MMX/NOPB satisfy these core requirements. Both substitutes deliver 105mW per channel at 16Ω load, which falls within acceptable tolerance for headphone amplifier applications. Output power variance of 3mW represents a 2.8% reduction from the original specification and does not preclude functional equivalence in standard headphone driver circuits. Both substitutes maintain identical supply voltage range, operating temperature specifications, and surface mount package dimensions. Feature sets differ slightly; substitutes include shutdown and thermal protection in place of the original short-circuit protection and standby configuration, representing functional enhancement rather than degradation.

Parameter Comparison

Engineering Selection Recommendations

The LM4809MMX/NOPB manufactured by Texas Instruments is the primary substitute for the obsolete TS486IST. This part maintains full compliance with RoHS3, REACH, and moisture sensitivity specifications identical to the original component. The LM4809MMX/NOPB is supplied in Tape & Reel packaging, supporting automated assembly processes. Active product status ensures long-term availability and supply chain continuity.

The LM4809MM/NOPB manufactured by National Semiconductor serves as a secondary substitute option. This part satisfies all electrical and mechanical compatibility requirements and is actively stocked. Bulk packaging format requires evaluation against specific procurement workflows.

Both substitutes operate within the identical supply voltage range and temperature envelope as the TS486IST. The 3mW reduction in maximum output power per channel does not compromise headphone driver functionality in standard consumer audio applications. Pin-compatible package footprints (8-TSSOP/8-MSOP) enable direct board-level substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the LM4809MMX/NOPB directly replace the TS486IST on existing PCBs?

A: Yes. Both components use identical 8-TSSOP/8-MSOP package footprints with 0.118" width and 3.00mm pitch. Pin configuration and electrical interface are compatible for direct substitution without PCB modification.

Q: What is the significance of the 3mW output power difference between the TS486IST and LM4809 substitutes?

A: The TS486IST delivers 108mW per channel while the LM4809 series delivers 105mW per channel at 16Ω load. This 2.8% variance falls within acceptable tolerance for headphone amplifier applications and does not alter functional performance in standard audio circuits.

Q: Are there differences in protection features between the TS486IST and substitute parts?

A: The TS486IST includes depop, short-circuit protection, and standby features. The LM4809MM/NOPB and LM4809MMX/NOPB include depop, shutdown, and thermal protection. Thermal protection provides enhanced device reliability compared to short-circuit protection alone.

Q: Which substitute part should be selected for new production designs?

A: The LM4809MMX/NOPB is recommended for new designs. This part is manufactured by Texas Instruments, maintains active product status, includes Tape & Reel packaging for automated assembly, and carries full RoHS3 and REACH compliance documentation.

Q: What is the difference between LM4809MM/NOPB and LM4809MMX/NOPB?

A: Both parts are electrically and mechanically equivalent. The primary difference is packaging format: LM4809MM/NOPB is supplied in Bulk, while LM4809MMX/NOPB is supplied in Tape & Reel. The "X" designation in LM4809MMX/NOPB indicates the Tape & Reel packaging variant.

Q: Are the substitute parts RoHS3 compliant?

A: The LM4809MMX/NOPB is RoHS3 compliant. Compliance status for LM4809MM/NOPB is not specified in available documentation and should be confirmed with the supplier for regulatory requirements.

Q: Can the TS486IST substitutes operate across the full -40°C to 85°C temperature range?

A: Yes. Both LM4809MM/NOPB and LM4809MMX/NOPB are rated for -40°C to 85°C operating temperature, matching the original TS486IST specification.