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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics TS486-1IST

Name: TS486-1IST
Brand: STMicroelectronics
SKU: TS486-1IST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS486-1IST

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: TS486-1IST.pdf

Description:: IC AMP AB STEREO 108MW 8MINISO

Quantity:: RFQ Add To RFQ list

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Inventory:4,245

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Product details

Overview

TS486-1IST from STMicroelectronics is a dual-channel, unity-gain stable audio power amplifier optimized for stereo headphone drive in low-voltage portable systems. It delivers 102mW per channel into 16Ω at 5V (0.1% THD+N), operates from 2V to 5.5V, consumes ≤2.5mA quiescent current, and features active-low standby mode with 10nA shutdown current. It targets space-constrained mobile audio interfaces requiring high SNR and crosstalk immunity.

For engineers reviewing the TS486-1IST datasheet, TS486-1IST pinout, TS486-1IST application, or TS486-1IST equivalent, key selection criteria include its fixed 0dB gain configuration, MiniSO8 package footprint, 103dB(A) SNR at 5V, 83dB crosstalk rejection at 1kHz, and compatibility with 16–32Ω headset loads in battery-powered designs.

Technical Context

The TS486-1IST implements a dual rail-to-rail output stage with integrated ON/OFF click reduction circuitry and short-circuit current limiting. Its internal architecture supports single-ended load driving without external DC-blocking capacitors when biased at VCC/2 via external CB capacitor.

It uses a fixed-gain (0dB, Av = –1) topology with no external gain-setting resistors required, and achieves 1.1MHz gain-bandwidth product and 0.4V/µs slew rate under 16Ω load - enabling full-audio-band fidelity with <0.3% THD+N up to 90mW/channel into 16Ω at 5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2V to 5.5V - enables direct operation from single Li-ion or dual alkaline cells without LDO regulation.
Output Power (16Ω, 5V)	102mW @ 0.1% THD+N - sufficient for loud, low-distortion stereo headphone playback at typical listening volumes.
Quiescent Current	≤2.5mA - minimizes battery drain during active audio playback in portable devices.
Standby Current	10nA (typ.) - extends shelf life and runtime in always-on audio subsystems with infrequent use.
SNR (A-weighted)	103dB at 5V - ensures audible noise floor remains below perceptual threshold even at maximum gain.
Crosstalk Rejection	83dB at 1kHz - prevents left/right channel bleed in stereo headphone applications requiring imaging precision.
PSRR	58dB at 1kHz - suppresses supply ripple-induced hum in noisy shared-rail mobile platforms.

Pinout & Package

TS486-1IST is housed in an 8-pin MiniSO8 package (3.0mm × 3.0mm, 0.65mm pitch), thermally optimized for portable PCB layouts with exposed pad (not electrically connected). Pin functions are validated per STMicroelectronics datasheet revision June 2003.

Pin/Terminal	Circuit Role	Design Meaning
1: BYPASS	Half-supply bias reference decoupling	Connects to 1µF capacitor to stabilize internal VCC/2 reference; critical for DC offset control and click suppression.
2: GND	Analog/digital ground reference	Common return for all signal paths; must be tied to low-impedance ground plane to maintain SNR and PSRR.
3: SHUTDOWN	Active-low enable control	Pull low to activate amplifier; high-Z or >1.5V disables output and reduces ICC to 10nA - used for system-level power gating.
4: Vcc	Positive supply input	Accepts 2–5.5V; requires local 100nF ceramic bypass capacitor to minimize high-frequency supply noise coupling.
5: OUT(2)	Channel 2 output driver	Rail-to-rail output capable of sourcing/sinking ≥106mA; drives right-channel headphone load directly.
6: OUT(1)	Channel 1 output driver	Identical to OUT(2); provides matched performance for left-channel stereo symmetry.
7: VIN(2)	Channel 2 inverting input	Fixed-gain (0dB) configuration ties internally to feedback node; accepts AC-coupled audio signal.
8: VIN(1)	Channel 1 inverting input	Matches VIN(2); differential input structure enables common-mode noise rejection in single-ended source interfaces.

Key Features

Feature	Design Value
Unity-gain stable architecture	Eliminates need for external compensation components; simplifies layout and reduces BOM count in fixed-gain headphone amps.
Click-and-pop suppression	Integrated turn-on/turn-off sequencing reduces audible transients during power state transitions - critical for user experience.
Short-circuit protection	Limits output current to ≤115mA per channel under fault conditions, preventing thermal runaway and enabling robust field operation.
Low-voltage operation down to 2V	Maintains 12mW/channel into 16Ω at 2V (THD+N ≤ 0.3%), supporting legacy battery chemistries and extended discharge curves.
High PSRR (58dB @ 1kHz)	Rejects switching regulator noise on shared VCC rails - essential for clean audio in PMIC-integrated mobile SoC designs.

Applications

Mobile Headphone Interface

USB-C Audio Adapter

Use Scenario: Driving stereo 16–32Ω headphones from a smartphone baseband processor's line-out or DAC output.

IC Role / Device Role / Timing Role: Final-stage analog output buffer and power booster; converts low-current DAC output to high-fidelity, low-impedance headphone drive.

Use Value: Delivers 102mW/channel at 5V with 0.1% THD+N and 103dB SNR - enabling loud, distortion-free playback without external filtering or level-shifting.

Use Scenario: Embedded audio codec in compact USB-C dongles converting digital USB audio to analog 3.5mm jack output.

IC Role / Device Role / Timing Role: Dual-channel headphone amplifier with integrated standby control synchronized to USB suspend/resume signaling.

Use Value: 10nA shutdown current extends dongle battery life during host sleep; MiniSO8 footprint fits sub-15mm² PCB area constraints.

Industrial Handheld Terminal

Smart Speaker Auxiliary Output

Use Scenario: Audio feedback path in ruggedized handheld scanners or data collectors requiring audible prompts and voice guidance.

IC Role / Device Role / Timing Role: Low-power stereo amplifier interfacing with microcontroller PWM or I²S DAC outputs.

Use Value: Operates down to 2V supply - compatible with partially discharged Li-ion packs; 83dB crosstalk ensures clear mono prompt separation in noisy environments.

Use Scenario: Secondary headphone output in smart speakers, activated only when main speaker is muted or in private listening mode.

IC Role / Device Role / Timing Role: Standby-controlled auxiliary audio path, enabled via GPIO from voice assistant SoC.

Use Value: Fixed 0dB gain eliminates gain-matching calibration; 2.5mA active current avoids measurable impact on primary speaker power budget.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel headphone amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX4410ETE+	Fixed 2V/V (6dB) gain; higher 3.5mA ICC; SO8-only packaging	Requires external attenuation for 0dB line-level matching; less suitable for direct DAC interface without level shift	Select when higher output swing is needed at 3.3V supply, accepting increased quiescent draw and gain mismatch.
TFA9894UK/N1	Digital input (I²S), Class-D topology; 125mW into 16Ω; integrated DSP	No analog input path; requires firmware integration; higher EMI sensitivity due to switching frequency	Prefer for new designs with digital audio sources and need for parametric EQ or loudness compensation.

Compared with MAX4410ETE+ and TFA9894UK/N1, TS486-1IST offers the lowest standby current (10nA vs ≥1µA), smallest footprint (MiniSO8 vs SO8), and true 0dB gain - making it optimal for analog-input, ultra-low-power, space-constrained headphone interfaces where simplicity and battery longevity are prioritized over digital features or higher output power.

Availability

TS486-1IST is available at Aetrix Electronics and suitable for mobile phone audio subsystems, USB-C adapter designs, industrial handheld terminals, and smart speaker auxiliary outputs requiring stable component supply across long-lifecycle consumer and embedded programs.

Supply support for TS486-1IST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, and power ICs for automotive, industrial, and consumer markets.

The TS486 series belongs to ST's low-voltage audio amplifier product line, engineered specifically for energy-efficient stereo headphone drive in portable electronics with stringent size and battery-life requirements.

FAQ

What is the minimum recommended output coupling capacitor value for TS486-1IST driving 16Ω headphones?

The datasheet specifies COUT ≥ 220µF for 16Ω loads to maintain ≤0.5dB low-frequency response down to 20Hz (fc = 1/(2π × RL × COUT)). Using 220µF–470µF electrolytic or polymer capacitors ensures adequate bass extension while minimizing physical size and ESR-related distortion.

Does TS486-1IST require an external VCC/2 biasing network?

No - TS486-1IST integrates an internal VCC/2 reference generator. Only a 1µF bypass capacitor on the BYPASS pin is required to stabilize this node. External resistive dividers or op-amp buffers are unnecessary, reducing component count and PCB area.

Can TS486-1IST drive 32Ω headphones at 3.3V supply?

Yes - it delivers 38mW per channel into 32Ω at 3.3V with 0.1% THD+N at 1kHz, meeting typical loudness requirements for portable audio. Output swing remains rail-to-rail (2.68Vpp), ensuring full dynamic range without clipping at rated power.

Is thermal derating required for continuous operation in MiniSO8 package?

Yes - with RθJA = 215°C/W (MiniSO8, standard PCB), junction temperature rise exceeds safe limits above ~45mW total dissipation. For 102mW/channel operation, limit duty cycle or implement copper pour heatsinking; full-power continuous use requires thermal design review per Figure 28 in the datasheet.

TS486-1IST Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Class AB

Output Type:: Headphones, 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 108mW x 2 @ 16Ohm

Voltage - Supply:: 2V ~ 5.5V

Features:: Depop, Short-Circuit Protection, Standby

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: 8-MiniSO

TS486-1IST FAQ

1.How can I place an order for TS486-1IST through Aetrix?

Please submit a Request for Quotation (RFQ) for TS486-1IST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TS486-1IST reliable?

The price and inventory of TS486-1IST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS486-1IST is usually 5 days.

3.What payment methods are accepted for TS486-1IST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS486-1IST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS486-1IST?

TS486-1IST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS486-1IST order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TS486-1IST?

For technical support, including TS486-1IST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS486-1IST requirements.

6.How does Aetrix verify that TS486-1IST is sourced from the original manufacturer or authorized distributors?

All TS486-1IST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS486-1IST meets industry standards.

7.What is the process for return or replacement of TS486-1IST?

All TS486-1IST units undergo pre-shipment inspection (PSI). If there is an issue with TS486-1IST, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TS486-1IST part is unused and in its original packaging.

Return procedure for TS486-1IST:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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