TS486-1IST Equivalent & Substitute Parts

Part Overview

The TS486-1IST is a Class AB stereo headphone amplifier IC manufactured by STMicroelectronics in 8-MiniSO surface mount packaging. 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 TS486-1IST is classified as obsolete, necessitating identification of functionally equivalent active alternatives for new designs and ongoing production requirements.

Substiute Parts

TS486-1IST

STMicroelectronicsIn Stock: 3558TS486-1IST 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 TS486-1IST is determined by equivalence across the following critical parameters:

Electrical Compatibility:

• Amplifier topology (Class AB)
• Output configuration (2-Channel Stereo Headphone)
• Supply voltage range (2V ~ 5.5V)
• Operating temperature range (-40°C ~ 85°C)

Mechanical Compatibility:

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

Functional Features:

• Depop functionality
• Thermal and short-circuit protection mechanisms

The substitute parts LM4809MM/NOPB and LM4809MMX/NOPB meet these criteria with output power specifications of 105mW per channel at 16Ω, representing a 2.8% reduction from the TS486-1IST. Both substitutes maintain identical supply voltage ranges, operating temperature specifications, and package dimensions. The LM4809 series implements equivalent protection features including depop, shutdown, and thermal protection.

Parameter Comparison

Engineering Selection Recommendations

LM4809MMX/NOPB (Texas Instruments) is the primary substitute for the TS486-1IST. This part maintains active product status, carries RoHS3 compliance certification, and holds MSL Level 1 rating identical to the original device. The LM4809MMX/NOPB is supplied in Tape & Reel packaging with 5900 units currently in stock, supporting high-volume production requirements.

LM4809MM/NOPB (National Semiconductor) serves as a secondary substitute option. This part is actively produced and functionally equivalent across all critical electrical and mechanical parameters. The LM4809MM/NOPB is supplied in Bulk packaging with 4445 units in stock. Compliance documentation for RoHS3 and MSL rating is not specified in available data.

Both LM4809 variants operate within the identical supply voltage range (2V ~ 5.5V) and temperature envelope (-40°C ~ 85°C) as the TS486-1IST. The 3mW reduction in maximum output power per channel (105mW versus 108mW at 16Ω) falls within acceptable tolerance for headphone amplifier applications. Package footprints are mechanically and electrically compatible, enabling direct PCB layout substitution.

Frequently Asked Questions (FAQ)

Q: Can the LM4809 series directly replace the TS486-1IST without PCB modifications?

A: Yes. Both the LM4809MM/NOPB and LM4809MMX/NOPB share identical 8-pin package dimensions (8-TSSOP, 8-MSOP, 0.118" width, 3.00mm) and pinout compatibility with the TS486-1IST. PCB layout and footprints require no modification.

Q: What is the significance of the 3mW output power difference between the TS486-1IST and LM4809 variants?

A: The TS486-1IST delivers 108mW per channel at 16Ω load, while LM4809 devices deliver 105mW per channel at the same load impedance. This 2.8% reduction does not impact headphone amplifier functionality in standard audio applications operating within the 2V to 5.5V supply range.

Q: Are the protection features equivalent between the TS486-1IST and LM4809 substitutes?

A: Both device families integrate depop functionality and thermal protection mechanisms. The TS486-1IST specifies short-circuit protection and standby mode, while LM4809 variants specify shutdown and thermal protection. These feature sets provide equivalent circuit protection across normal operating conditions.

Q: Which substitute part is recommended for new production designs?

A: The LM4809MMX/NOPB (Texas Instruments) is recommended for new designs. This part carries active product status, RoHS3 compliance certification, MSL Level 1 rating, and is supplied in Tape & Reel format suitable for automated assembly. Inventory availability is 5900 units.

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

A: Both parts are functionally identical Class AB stereo headphone amplifiers with 105mW per channel output at 16Ω. The primary differences are manufacturer (National Semiconductor versus Texas Instruments), packaging format (Bulk versus Tape & Reel), and available compliance documentation. Electrical performance and package dimensions are equivalent.

Q: Are supply voltage and operating temperature ranges identical across all three parts?

A: Yes. The TS486-1IST, LM4809MM/NOPB, and LM4809MMX/NOPB all operate across 2V to 5.5V supply voltage and -40°C to 85°C ambient temperature ranges. These specifications are fully compatible for direct substitution.

Q: What compliance certifications apply to each substitute part?

A: The LM4809MMX/NOPB carries RoHS3 compliance and MSL Level 1 certification. The LM4809MM/NOPB compliance status is not specified in available documentation. Both parts carry EAR99 ECCN classification and HTSUS code 8542.33.0001 identical to the TS486-1IST.