Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics TS4871IDT

Name: TS4871IDT
Brand: STMicroelectronics
SKU: TS4871IDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TS4871IDT

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS4871IDT.pdf

Description:: IC AMP CLASS AB MONO 1W 8SO

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,359

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TS4871IDT from STMicroelectronics is a mono rail-to-rail audio power amplifier delivering 1 W RMS into 8 Ω at 5 V supply, with 0.1% THD+N at 250 mW, 75 dB PSRR at 217 Hz, ultra-low 10 nA standby current, and unity-gain stability for portable audio output stages in mobile phones and notebooks.

For engineers reviewing the TS4871IDT datasheet, TS4871IDT pinout, TS4871IDT application, or TS4871IDT equivalent, this device supports low-voltage (2.5–5.5 V) operation, thermal shutdown protection, pop/click suppression, and external gain configuration-critical for battery-powered audio subsystems requiring high fidelity and minimal quiescent power.

Technical Context

The TS4871IDT is a single-channel Class-AB audio amplifier with rail-to-rail output swing, internally compensated for unity-gain stability across 2.5–5.5 V supply range. Its open-loop gain-bandwidth product is 2 MHz, with 70° phase margin and 20 dB gain margin under 8 Ω load and 500 pF capacitive load.

It features a dedicated standby control pin enabling <10 nA shutdown current, thermal shutdown activation at 150 °C junction temperature, and robust PSRR (75 dB @ 217 Hz) achieved via internal feedback architecture and bypass capacitor optimization.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	1 W RMS @ 5 V, 8 Ω, THD = 1%, 1 kHz - sufficient to drive small speakers without external boost stages
THD + N	0.15% @ 250 mW, 8 Ω, Gv = 2, 20 Hz–20 kHz - enables high-fidelity playback in portable audio
PSRR	75 dB @ 217 Hz, 5 V supply - rejects GSM/DC-DC switching noise in mobile handsets
Standby Current	10 nA typical - extends battery life during audio idle periods in always-on UI scenarios
Supply Range	2.5 V to 5.5 V - compatible with Li-ion, Li-poly, and dual-cell alkaline battery systems
Gain Bandwidth	2 MHz - supports stable operation up to 20 kHz with margin for capacitive loads
Phase Margin	70° @ unity gain, 8 Ω + 500 pF - ensures stable closed-loop behavior without external compensation

Pinout & Package

TS4871IDT is housed in MiniSO-8 package (3.0 mm × 4.9 mm, 1.75 mm height), thermally enhanced for surface-mount assembly on compact PCBs with limited copper area.

Pin/Terminal	Circuit Role	Design Meaning
1 (STBY)	Standby control input	Active-high logic: VSTB ≥ VCC − 0.5 V disables amplifier; ≤ 0.5 V enables operation
2 (IN+)	Non-inverting input	Accepts AC-coupled audio signal; common-mode range extends to VCC − 1.2 V
3 (IN−)	Inverting input	Connected to feedback network (R_feed) for gain setting; forms differential pair with IN+
4 (VOUT)	Amplifier output	Rail-to-rail swing capable; drives 4–32 Ω loads directly without external coupling capacitor
5 (GND)	Analog ground reference	Single-point return path for input bias, output current, and bypass capacitors
6 (VCC)	Positive supply rail	Supports 2.5–5.5 V; requires 100 µF bulk bypass (Cs) per datasheet layout guidelines
7 (BYP)	Bypass capacitor terminal	Connects to 1 µF capacitor to generate internal half-supply reference for single-supply operation
8 (NC)	No connect	Internally unused; must remain unconnected and unbonded per STMicroelectronics specification

Key Features

Feature	Design Value
Rail-to-rail output	Delivers full dynamic range into 8 Ω load without DC-blocking capacitor, reducing BOM count and board space
Ultra-low standby current	10 nA typical enables >1-year battery shelf life in always-on portable devices with periodic audio alerts
Thermal shutdown protection	Internal sensor triggers cutoff at 150 °C junction temperature, preventing latch-up or permanent damage during overload
Pop-and-click suppression	Integrated turn-on/off sequencing minimizes transient voltage spikes at startup/shutdown, eliminating audible artifacts
Unity-gain stable	Operates reliably with gain ≥ 1 using only external R_feed/R_in, eliminating need for stability-compensation networks

Applications

Mobile Handset Audio

Notebook Speaker Amplification

Use Scenario: Driving mono speaker in LTE smartphone during voice calls and media playback.

IC Role / Device Role / Timing Role: Final-stage audio power driver interfacing between codec DAC and 8 Ω speaker.

Use Value: 1 W output headroom ensures loudspeaker volume at low battery (2.6 V), while 10 nA standby preserves standby time.

Use Scenario: Amplifying stereo line-out to integrated notebook speakers with single-ended input.

IC Role / Device Role / Timing Role: Low-noise, low-distortion output stage replacing discrete transistor solutions.

Use Value: 0.15% THD+N and 75 dB PSRR suppress switching noise from CPU VRMs, improving perceived audio clarity.

Portable Media Player Output

PDA Audio Subsystem

Use Scenario: Delivering headphone-level signal to 16 Ω earbuds in flash-based MP3 players.

IC Role / Device Role / Timing Role: Single-supply rail-to-rail amplifier configured for Gv = 2 with external resistors.

Use Value: Rail-to-rail swing eliminates DC-blocking capacitor, reducing component count and enabling smaller form factor.

Use Scenario: Driving buzzer and alert speaker in industrial PDA with intermittent audio feedback.

IC Role / Device Role / Timing Role: Standby-controlled audio driver activated only during system alerts.

Use Value: 1 μs standby response time allows rapid audio wake-up without perceptible latency in UI notifications.

Equivalent & Alternatives

The following parts are listed as comparable options for similar mono audio amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX9718ETA+	Higher 1.4 W output @ 5 V/8 Ω but 120 µA standby current; requires external bootstrap capacitor	Better suited for higher-power speaker drivers where standby current is secondary to peak output	Choose MAX9718ETA+ when >1 W output is required and PCB space allows extra capacitor
TAS5342DAP	Class-D topology, 2.5 W output, 90% efficiency, but requires LC filter and has higher EMI sensitivity	Preferred in thermally constrained designs where efficiency > fidelity is prioritized	Choose TAS5342DAP when battery runtime dominates audio quality requirements and EMI filtering is feasible

Compared with MAX9718ETA+ and TAS5342DAP, TS4871IDT offers the lowest standby current (10 nA vs. 120 µA/15 µA), best PSRR (75 dB vs. 65 dB/55 dB), and simplest BOM (no bootstrap/LC filter), making it optimal for cost-sensitive, low-power portable audio where analog fidelity and fast wake-up matter.

Availability

TS4871IDT is available at Aetrix Electronics and suitable for mobile handset audio, notebook speaker amplification, portable media player output, and PDA audio subsystems requiring stable component supply with guaranteed long-term availability.

Supply support for TS4871IDT 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, specializing in analog, microcontrollers, power management, and automotive ICs.

The TS4871IDT belongs to ST's low-voltage audio amplifier product line, designed specifically for battery-powered portable electronics demanding high efficiency, ultra-low standby power, and minimal external components.

FAQ

What is the minimum recommended bypass capacitor value on the BYP pin?

The BYP pin requires a 1 µF ceramic capacitor (X7R, ±10%) connected to ground to establish a stable internal half-supply reference. Using 0.1 µF reduces PSRR by up to 15 dB at 100 Hz–1 kHz, degrading noise immunity in noisy power environments.

Can TS4871IDT drive a 4 Ω speaker at 5 V?

Yes-it delivers 1.4 W into 4 Ω at 5 V with THD ≤ 1%, but power dissipation rises significantly. Thermal derating must be applied: above 75 °C ambient, output power must be reduced per Figure 21's MiniSO-8 curve to avoid thermal shutdown.

Is external gain-setting resistor mandatory?

No-TS4871IDT is unity-gain stable and operates without external resistors. However, gain-setting resistors (R_in, R_feed) are required to configure closed-loop gain >1; values are selected per Table 6's Gv = 2×(R_feed/R_in) formula.

Does TS4871IDT require input coupling capacitors?

Yes-an AC-coupling capacitor (e.g., 1 µF) is required on IN+ to block DC offset from upstream sources. The datasheet specifies Cin = 1 µF for flat 20 Hz–20 kHz response; smaller values (e.g., 22 nF) roll off bass response below 100 Hz.

TS4871IDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 1W x 1 @ 8Ohm

Voltage - Supply:: 2.5V ~ 5.5V

Features:: Depop, Standby, Thermal Protection

Mounting Type:: Surface Mount

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

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

TS4871IDT FAQ

1.How can I place an order for TS4871IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4871IDT 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 TS4871IDT reliable?

The price and inventory of TS4871IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4871IDT is usually 5 days.

3.What payment methods are accepted for TS4871IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4871IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4871IDT?

TS4871IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4871IDT 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 TS4871IDT?

For technical support, including TS4871IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4871IDT requirements.

6.How does Aetrix verify that TS4871IDT is sourced from the original manufacturer or authorized distributors?

All TS4871IDT 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 TS4871IDT meets industry standards.

7.What is the process for return or replacement of TS4871IDT?

All TS4871IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS4871IDT, 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 TS4871IDT part is unused and in its original packaging.

Return procedure for TS4871IDT:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…