component

LM4890M

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by Ray

HGSEMI Audio Amplifiers, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentamplifiers-comparatorslm4890m
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Contents

README

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LM4890M

HGSEMI · Audio Amplifiers · SOP-8

LM4890M from HGSEMI, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 SHDN input Shutdown control input. Device enters shutdown mode when a low level is applied (V<0.4V typ). Start-up threshold ~1.4V. Shutdown current 0.1µA typ.
2 BYPASS passive Bypass capacitor pin which provides the common-mode voltage (VDD/2). Typically bypassed to GND with ~0.2µF (CBY) for low-noise mid-supply reference and PSRR performance.
3 +IN input Positive (non-inverting) input of the first amplifier. Receives the common-mode voltage; typically AC-coupled to signal ground via bypass in single-ended configuration.
4 -IN input Negative (inverting) input of the first amplifier. Receives the audio input signal. Connected to the feedback resistor Rf and to the input resistor Rin; gain Av = -Rf/Rin.
5 VO1 output Negative BTL output of the LM4890. Connected to one side of the 8Ω load speaker and to the feedback resistor Rf of the first amplifier.
6 VDD power_in Analog VDD input supply, 2.5V to 5.5V operating range (6V absolute max). Quiescent current ~2.5mA at 5.5V, no load. Bypass locally with ceramic capacitor to GND.
7 GND power_in Ground connection for circuitry. Reference for VDD, input signals, and speaker load return.
8 VO2 output Positive BTL output of the LM4890. Connected to the opposite side of the 8Ω load speaker relative to VO1, forming the bridge-tied load.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOP-8
Category Amplifiers/Comparators
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • LM4890MM/TR
  • LM4890MN
  • LM4890MMM/TR

CAD (KiCad official)

  • Symbol: LM4890M
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HGSEMI datasheet (13 pp, sha256 febb988aa441e76d, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF