8002B from IDCHIP, 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	SD	input	Shutdown control input. Logic HIGH (VIH = 1.5V to VDD) puts the amplifier into shutdown (IOFF ≈ 0.6µA typical); logic LOW (VIL = 0 to 1V) enables normal operation. Must NOT be left floating - tie to GND when the shutdown feature is unused.
2	BYP	passive	Bypass pin - internal VDD/2 mid-supply reference output. Connect an external bypass capacitor (typically 1µF) from this pin to GND to filter the mid-supply bias and improve PSRR / low-frequency THD+N.
3	NC	unconnected	No connection / no internal function. Datasheet notes '芯片第3脚无功能' (pin 3 has no function). Note that the typical application schematic labels this pin 'INP' but the pin description table and features list both confirm it is NC on the 8002B variant.
4	INN	input	Inverting analog audio input. Signal is AC-coupled through Ci (typ. 0.39µF) and Ri (typ. 20kΩ). With feedback resistor Rf (typ. 68kΩ), the differential closed-loop gain is AVD = 2*(Rf/Ri).
5	VO1	output	Bridge-tied load audio output 1. Connect one terminal of the speaker between VO1 and VO2. Output is DC-biased at VDD/2 - no output coupling capacitor required. Delivers up to 2.8W into 4Ω BTL at 5V (THD+N=10%).
6	VDD	power_in	Positive supply voltage input. Operating range 2.2V to 5.5V (absolute max 6.5V). Bypass with 10µF + 0.1µF ceramic capacitors placed close to the pin. Quiescent current IDD ≈ 10mA (no load).
7	GND	power_in	Ground / power return. Connect to system ground with a low-impedance path close to the supply bypass capacitors.
8	VO2	output	Bridge-tied load audio output 2. Connect the other terminal of the speaker between VO2 and VO1. Internally driven 180° out of phase with VO1 by a fixed unity-gain inverter (set by two internal 20kΩ resistors), giving 4× the output power of a single-ended amplifier at the same supply.

Key specifications

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

Ordering variants

8002B

CAD (KiCad official)

Symbol: 8002B
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
`8002b.step`	122 KB	You want the bare part, or you mark your own boards.
`8002b-etched.step`	1.7 MB	You want the part with `8002B` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 410 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: IDCHIP datasheet (6 pp, sha256 a33543411fb0ed59, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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