FM8002A from Shenzhen Fuman, in a SOP-8. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	SHUTDOWN	input	Shutdown control input. Drive high (=VDD) to disable the amplifier and drop supply current to ~4.2µA; drive low (0V) for normal operation. Requires a valid logic level (do not float); an external pull-up resistor may be used with a single-throw switch to keep it in a defined state.
2	BYPASS	passive	Internal bias reference node (VDD/2). Connect a 1.0µF bypass capacitor from this pin to GND as close as possible to the device to stabilize the internal bias voltage and improve PSRR. Larger CBY further improves PSRR.
3	+IN	input	Non-inverting analog audio input of the first op-amp stage. Typically biased at VDD/2 via the BYPASS network in the standard AC-coupled single-ended input topology.
4	-IN	input	Inverting analog audio input of the first op-amp stage. Closed-loop differential gain is set as AVD = 2×(Rf/Ri) using an external feedback resistor Rf from VO1 to this pin and an input resistor Ri from the AC-coupled audio source.
5	VO1	output	BTL audio output 1 (output of the first, externally-set-gain op-amp). Connects to one terminal of the speaker load and to the Rf feedback network. No output coupling capacitor is required.
6	VDD	power_in	Positive supply input. Operating range 1.6V to 6V (absolute max 6V). Decouple with a 1.0µF (tantalum) capacitor to GND close to the pin.
7	GND	power_in	Device ground / power return.
8	VO2	output	BTL audio output 2 (output of the second, internally-fixed unity-inverting op-amp, AV=-1). Drives the opposite terminal of the speaker to form a bridge-tied load, quadrupling output power vs. a single-ended output at the same supply.

Key specifications

Parameter	Value
Manufacturer	Shenzhen Fuman
Package	SOP-8
Category	Op-amp/Cmp
Pins	8

CAD (KiCad official)

Symbol: FM8002A
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`fm8002a.step`	122 KB	You want the bare part, or you mark your own boards.
`fm8002a-etched.step`	1.8 MB	You want the part with `FM8002A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 433 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: Shenzhen Fuman datasheet (6 pp, sha256 9b87e3a7f10103c6, 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