My Inquiry
My Account
STMicroelectronics TS489IQT
- Part No.:
- TS489IQT
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
TS489IQT.pdf
- Description:
- IC AMP CLASS AB STER 130MW 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,861
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS489IQT from STMicroelectronics is a dual-channel, pop-and-click noise-suppressed stereo headphone amplifier IC designed for low-voltage portable audio systems. It delivers 120 mW per channel into 16 Ω at 5 V (0.1% THD+N), operates from 2.2 V to 5.5 V, features active-low standby mode with 10 nA typical current, and is unity-gain stable with external resistor-set gain. It targets space-constrained mobile audio interfaces requiring high SNR and crosstalk immunity.
For engineers reviewing the TS489IQT datasheet, TS489IQT pinout, TS489IQT application, or TS489IQT equivalent, this page provides verified electrical specifications, DFN8 package layout, real-world audio performance metrics (THD+N, PSRR, SNR), and validated alternatives for portable headset driver design.
Technical Context
The TS489IQT implements a dual, single-ended output architecture optimized for driving 16 Ω or 32 Ω stereo headphones without DC-blocking capacitors when used with split-rail or virtual-ground configurations. Its internal pop/click suppression circuitry actively manages bias transients during power-up/down and standby transitions.
It uses rail-to-rail output stages with 0.65 V/µs slew rate (RL = 16 Ω), achieves 102 dB crosstalk rejection at 1 kHz, and maintains 70 dB PSRR at 1 kHz with inputs grounded - all while consuming only 2.7 mA max at 5 V and dropping to 10 nA in standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.2 V to 5.5 V - supports Li-ion, USB, and multi-cell battery systems without LDO pre-regulation. |
| Output Power (16 Ω) | 120 mW @ 5 V, 0.1% THD+N - sufficient for loud, distortion-free playback on standard earbuds. |
| THD+N (1 kHz) | 0.3% max. @ 20 Hz–20 kHz - meets Hi-Fi audio fidelity requirements for portable devices. |
| SNR (A-weighted) | 105 dB @ 5 V, RL = 32 Ω - enables quiet background reproduction with minimal audible noise floor. |
| PSRR | 70 dB typ. @ 1 kHz - rejects supply ripple from noisy digital SoCs or switching regulators. |
| Standby Current | 10 nA typ. - extends battery life in always-on audio subsystems (e.g., voice assistant wake-up). |
| Crosstalk | −102 dB @ 1 kHz - prevents left/right channel leakage critical for stereo imaging accuracy. |
Pinout & Package
TS489IQT is housed in a thermally enhanced DFN8 (2 mm × 2 mm, 0.55 mm height) package with exposed thermal pad (EP) on underside for PCB heat dissipation. Pin 1 marked by dot; pins numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (STBY) | Standby control input | Active-low enable: drives IC into ultra-low-power state (<10 nA) when pulled to GND. |
| 2 (IN1−) | Inverting input, Channel 1 | Accepts differential or single-ended audio signal; gain set by external Rin/Rfeed. |
| 3 (OUT1) | Output, Channel 1 | Rail-to-rail single-ended output capable of ±2.25 V swing into 16 Ω @ 5 V. |
| 4 (GND) | Ground reference | Common return path for analog and power domains; must connect to low-impedance PCB ground plane. |
| 5 (VCC) | Positive supply | Single 2.2–5.5 V rail; bypass with 1 µF ceramic capacitor near pin for PSRR optimization. |
| 6 (OUT2) | Output, Channel 2 | Independent rail-to-rail output matched to OUT1 for stereo symmetry and crosstalk control. |
| 7 (IN2−) | Inverting input, Channel 2 | Second channel input; identical gain configuration and AC-coupling requirements as IN1−. |
| 8 (EP) | Exposed thermal pad | Internally connected to GND; requires solid solder connection to inner-layer copper pour for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Pop & click suppression | Integrated transient control eliminates audible artifacts during power sequencing and standby entry/exit. |
| Unity-gain stability | Operates stably with external gain-setting resistors (no compensation capacitor required). |
| Ultra-low standby current | 10 nA typical enables >1-year battery life in always-listening wearable audio applications. |
| High PSRR & SNR | 70 dB PSRR + 105 dB A-weighted SNR ensures clean audio even with shared noisy power rails. |
| Short-circuit protection | Internal foldback limits output current during accidental load shorts, preventing latch-up or damage. |
Applications
| Mobile Headphone Interface | USB-C Audio Adapter |
|---|---|
|
Use Scenario: Driving stereo earbuds directly from a smartphone application processor's line-out or DAC output. IC Role / Device Role / Timing Role: Final-stage audio buffer and power amplifier; handles DC biasing, gain setting, and transient suppression. Use Value: Eliminates need for external coupling capacitors and reduces BOM count by integrating pop/click suppression. |
Use Scenario: Embedded audio solution in compact USB-C dongles supporting analog headphone output. IC Role / Device Role / Timing Role: Dual-channel line driver with rail-to-rail output swing compatible with 3.3 V USB-C VBUS-derived supplies. Use Value: Delivers 55 mW/channel @ 3.3 V into 16 Ω with <0.3% THD+N - sufficient for high-fidelity wired listening. |
| Smart Speaker Aux Input | Industrial Portable Monitor Audio |
|
Use Scenario: Adding 3.5 mm auxiliary input capability to voice-controlled smart speakers with limited PCB area. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current headphone amp enabling always-on audio monitoring path. Use Value: 10 nA standby current allows persistent audio readiness without compromising system battery runtime. |
Use Scenario: Audio feedback channel in ruggedized handheld test equipment or field service monitors. IC Role / Device Role / Timing Role: Robust stereo driver rated for −40 °C to +85 °C operation with short-circuit and thermal protection. Use Value: Maintains 120 mW output power and 102 dB crosstalk across industrial temperature range for consistent audio quality. |
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 |
|---|---|---|---|
| MAX98357AETE+T | Class D, I²S-input only; no analog inputs or standby pin; higher efficiency but requires external DAC. | Suitable for digital-audio-first designs; not drop-in for analog line-in systems. | Select when system uses I²S output and prioritizes >90% efficiency over analog flexibility. |
| TAS5707PAG | Class D stereo amplifier with integrated DSP; 24-bit I²S interface; no analog input support. | Requires full digital audio path; lacks analog standby control and pop suppression logic. | Choose for advanced audio processing (EQ, volume control) and multi-format digital input support. |
Compared with TS489IQT, MAX98357A offers superior efficiency but forfeits analog input compatibility and standalone standby control, while TAS5707PAG adds DSP functionality at the cost of analog interface support and increased firmware complexity.
Availability
TS489IQT is available at Aetrix Electronics and suitable for mobile phone audio subsystems, USB-C adapter designs, smart speaker auxiliary interfaces, and industrial portable monitor audio outputs requiring stable component supply across extended temperature ranges.
Supply support for TS489IQT 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, power, and microcontroller solutions for automotive, industrial, and consumer markets.
The TS489 belongs to ST's low-power audio amplifier product line, engineered specifically for space- and power-constrained portable audio endpoints requiring high-fidelity analog output with minimal external components.
FAQ
What is the minimum recommended supply voltage for TS489IQT?
The TS489IQT is fully specified down to 2.2 V, delivering 31 mW per channel into 16 Ω at 2.5 V with 0.1% THD+N. Operation below 2.2 V is outside absolute maximum ratings and may cause undefined behavior or failure to meet datasheet performance guarantees.
Does TS489IQT require external gain-setting resistors?
Yes - TS489IQT is unity-gain stable but not internally compensated for fixed gain. External inverting-input resistors (Rin, Rfeed) are mandatory to set closed-loop gain (AV = −Rfeed/Rin) and configure high-pass filtering with input coupling capacitors.
Can TS489IQT drive 32 Ω headphones effectively?
Yes - it delivers 75 mW per channel into 32 Ω at 5 V (0.1% THD+N), with 105 dB SNR and −102 dB crosstalk. Output swing remains rail-to-rail, and thermal derating is negligible at this load, making it ideal for higher-impedance earbuds and studio-style headphones.
Is the exposed thermal pad (Pin 8) electrically connected?
Yes - the exposed pad (EP) is internally connected to GND and must be soldered to a dedicated GND copper pour on the PCB. Failure to do so degrades thermal performance, increases junction temperature, and risks exceeding the 150 °C maximum rating under sustained 120 mW output conditions.
TS489IQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Class AB
- Output Type:
- Headphones, 2-Channel (Stereo)
- Max Output Power x Channels @ Load:
- 130mW x 2 @ 16Ohm
- Voltage - Supply:
- 2.2V ~ 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-DFN (2x2)
TS489IQT FAQ
1.How can I place an order for TS489IQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS489IQT 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 TS489IQT reliable?
The price and inventory of TS489IQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS489IQT is usually 5 days.
3.What payment methods are accepted for TS489IQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS489IQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS489IQT?
TS489IQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS489IQT 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 TS489IQT?
For technical support, including TS489IQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS489IQT requirements.
6.How does Aetrix verify that TS489IQT is sourced from the original manufacturer or authorized distributors?
All TS489IQT 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 TS489IQT meets industry standards.
7.What is the process for return or replacement of TS489IQT?
All TS489IQT units undergo pre-shipment inspection (PSI). If there is an issue with TS489IQT, 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 TS489IQT part is unused and in its original packaging.
Return procedure for TS489IQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS489IQT Tags
-Exposed-Pad.jpg)
-
TS34119CS RLG
Taiwan Semiconductor Corporation
-
LM386MX-1/NOPB
Texas Instruments
-
TPA711DGNR
Texas Instruments
-
LM386N-4/NOPB
Texas Instruments
-
TS4990IST
STMicroelectronics
-
PAM8302AASCR
Diodes Incorporated
-
TPA6130A2RTJR
Texas Instruments
-
TPA6111A2DGNR
Texas Instruments
-
LM4861MX/NOPB
Texas Instruments
-
LM386M-1/NOPB
Texas Instruments
-
NCS2211DR2G
onsemi
-
IS31AP2005-DLS2-TR
Lumissil Microsystems
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
