NATIONALS LM4866MTX/NOPB

Mfr. Part

LM4866MTX/NOPB

Manufacturer

NATIONALS

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Detailed Description

Stereo audio power amplifier IC for portable and embedded audio. Lead-free NOPB variant, supplied in tape-and-reel (MTX). Thin TSSOP-20 package for space-constrained designs. Classified under Integrated Circuits (ICs), Specialized ICs.

Key Features

Stereo audio power amplifier with bridge-tied load outputs

Low noise and low distortion for clear sound

Click-pop suppression for cleaner startup and shutdown

Built-in shutdown mode for low power standby

Short-circuit and thermal protection for robust operation

Minimal external components required

Surface-mount TSSOP-20 package for compact PCB layouts

Key Advantages

Simple, direct speaker-drive solution for portable devices

Small footprint reduces board space and BOM complexity

Energy-efficient with low quiescent and shutdown currents

Integrated protections improve reliability and product lifetime

Lead-free NOPB for environmental compliance (RoHS-friendly)

Packaging

Type: TSSOP-20 (Thin Shrink Small Outline, 20 leads), tape-and-reel “MTX” for automated assembly

Case code: 988 (vendor case identifier as provided)

Material: Molded epoxy package with copper leadframe; matte-tin lead finish (lead-free)

Size: Approx. 6.5 mm × 4.4 mm body, ~1.2 mm height; 0.65 mm lead pitch; 20 pins

Pin configuration: 20-lead arrangement suitable for stereo inputs, outputs, gain/volume control, shutdown, and power pins (refer to datasheet for exact pinout)

Thermal characteristics: Designed for good thermal performance in typical consumer PCBs; actual thermal impedance depends on copper area and airflow (see datasheet for guidance)

Electrical properties (family-typical): Operates from a low-voltage single supply; capable of directly driving small speakers in BTL; low THD+N; low quiescent current; shutdown current in the microamp range (verify exact limits in the datasheet for LM4866MTX/NOPB)

Lifecycle

Current status: Widely used legacy audio amplifier; availability may vary by region and date. Check with Y-IC for up-to-date supply.

Discontinuation: Not confirmed as nearing discontinuation, but this family is mature. Plan for lifecycle risk in long-term designs.

Equivalent or alternative models: Suitability depends on required power, pinout, and features. Consider these common alternatives and verify compatibility:

- LM4861, LM4863, LM4864, LM4865, LM4868 (same family, varying output power and features)

- LM4871, LM4875 (similar stereo/mono audio amp options)

- TI TPA-series (e.g., TPA2000D2, TPA2012D2) for Class-D efficiency in similar power ranges

- Note: Pinouts, gain settings, supply range, and external component requirements differ. Always confirm with datasheets.

If you need a drop-in or closer functional match and do not see it here, contact our sales team via the Y-IC website for tailored recommendations and availability.

Key Application Areas

Portable speakers, handheld devices, and toys

MP3 players, smartphones, tablets, and PDAs

Notebooks, docking stations, and multimedia peripherals

Embedded audio in industrial and consumer systems

Intercoms, alarm panels, and voice prompts

Datasheet

Y-IC hosts the most authoritative datasheet for LM4866MTX/NOPB. For accurate pinout, electrical limits, thermal data, and design guidelines, download the datasheet directly from this page on our website.

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