LPA4890MSF from LOWPOWER, in a MSOP-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	SHUTDOWN	input	Active-low shutdown control. Driving this pin below ~0.4V places the device in ultra-low-current (0.1µA typ) shutdown mode; driving above ~1.4V enables normal operation. Compatible with 0.4V logic thresholds.
2	BYPASS	passive	Bypass capacitor pin providing the internal VDD/2 common-mode reference voltage. Connect a bypass capacitor (typically 0.2µF-4.7µF) from this pin to GND; larger capacitance improves PSRR and reduces pop noise.
3	+IN	input	Non-inverting (positive) audio input of the first amplifier. Receives the internal common-mode voltage (VDD/2) via the BYPASS reference; used for single-ended or differential input configuration.
4	-IN	input	Inverting (negative) audio input of the first amplifier. Receives the audio input signal via the input coupling capacitor and input resistor Rin, and connects to the feedback resistor Rf that sets closed-loop gain.
5	VO1	output	Negative BTL output of the LPA4890. Connects to one terminal of the load speaker and to the feedback resistor Rf that closes the gain loop around the first amplifier.
6	VDD	power_in	Analog supply input, 2.5V to 5.5V operating range (6V absolute max). Bypass locally with a 1µF ceramic decoupling capacitor to GND. Quiescent current is 2.5mA typ at 5.5V.
7	GND	power_in	Ground return for all circuitry. Should be tied to a solid ground plane; keep the return path short and low-impedance for best THD+N and PSRR.
8	VO2	output	Positive BTL output of the LPA4890. Connects to the other terminal of the load speaker, forming a bridge-tied-load together with VO1 (no output coupling capacitor required).

Key specifications

Parameter	Value
Manufacturer	LOWPOWER
Package	MSOP-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

LPA4890MSF

CAD (KiCad official)

Symbol: LPA4890MSF
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lpa4890msf.step`	123 KB	You want the bare part, or you mark your own boards.
`lpa4890msf-etched.step`	2.1 MB	You want the part with `LPA4890MSF` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 529 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: LOWPOWER datasheet (10 pp, sha256 39fbf37faef97cac, 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