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LM4890MX-NOPB

LM4890MX/NOPB TI Class AB Audio Amp, 1W Mono 8-SOIC

MPNLM4890MX/NOPB
End of Life

Texas Instruments Boomer® series, Class AB audio amplifier, 1-Channel (Mono), 1W x 1 @ 8Ohm, 8-SOIC (0.154", 3.90mm Width), 2.2V ~ 5.5V supply, -40°C ~ 85°C.

$1.68Ref. price · indicative, final on quote
Texas Instruments LM4890MX/NOPB datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
SeriesBoomer®
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM4890MX/NOPB specifications
ParameterValue
TypeClass AB
SeriesBoomer®
Output type1-Channel (Mono)
MountingSurface Mount
Supply voltage2.2V ~ 5.5V
Max output power x channels @ load1W x 1 @ 8Ohm
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesDepop, Shutdown, Thermal Protection
Case8-SOIC (0.154\", 3.90mm Width)

Product details

Built-in features for clean audio and reliability

The LM4890MX/NOPB: Depop circuitry suppresses the turn-on thump that otherwise sends a DC transient to the speaker. Shutdown mode cuts quiescent current for battery conservation. Thermal protection prevents die damage under sustained overload or high ambient temperature — useful when the amplifier is driving a speaker inside a sealed enclosure.

The /NOPB suffix confirms ROHS3 compliance, so it passes lead-free reflow profiles without issue. The tape-and-reel option (TR) suits automated pick-and-place; cut-tape (CT) is available for prototype or low-volume builds.

It remains a current-production part from Texas Instruments.

Frequently asked questions

What is the difference between LM4890MX/NOPB and LM4890M?

The LM4890MX/NOPB is the ROHS3-compliant variant of the LM4890M, sharing the same Class AB mono amplifier core, 1W output, and 8-SOIC package. The /NOPB suffix indicates lead-free construction, which is the standard for new designs.

Can LM4890MX/NOPB be used in 5V systems?

Yes, the supply range of 2.2V to 5.5V covers 5V rails directly, so it works in 5V-powered audio circuits without a regulator.

What is the pinout of LM4890MX/NOPB?

The LM4890MX/NOPB uses the standard 8-SOIC pinout for the Boomer® family: pins include shutdown, bypass, audio input, output, and supply/ground. The exact pin mapping is in the TI datasheet.