NS4160 from Shenzhen Nsiway Tech, in a ESOP-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	CTRL	input	Shutdown and Class-AB/Class-D mode selection control input via a one-wire pulse protocol. Logic low shuts down the amplifier (Vctrl=VDD puts the chip in shutdown with ~1 µA typical leakage). VIH ≥ 1.4V, VIL ≤ 0.4V; one-wire pulse high/low time 1-12 µs, shutdown assertion time ≥ 100 µs.
2	Bypass	passive	Internal reference-voltage bypass node. Connect an external decoupling capacitor (typ. 0.1 µF) from this pin to GND to filter the mid-supply reference and improve PSRR/noise performance.
3	INP	input	Positive (non-inverting) differential audio input to the input buffer. AC-coupled through a 0.1 µF capacitor with a 10 kΩ series/gain-setting resistor in the typical application.
4	INN	input	Negative (inverting) differential audio input to the input buffer. AC-coupled through a 0.1 µF capacitor with a 10 kΩ series/gain-setting resistor in the typical application.
5	VoN	output	Negative bridge-tied-load (BTL) speaker output from the output stage. Drives one terminal of the loudspeaker directly (filterless in Class-D mode); supports 2Ω/4Ω/8Ω loads.
6	VDD	power_in	Positive power supply input, 3.0 V to 5.5 V (absolute max 5.5 V). Decouple to GND with a 1 µF capacitor close to the pin. Typical quiescent current IDD ≈ 12 mA at 3.6 V and 18 mA at 5.0 V.
7	GND	power_in	Device ground return. Provides the reference for the supply, bypass capacitor, and speaker return currents; also acts as the thermal reference for the eSOP-8 package.
8	VoP	output	Positive bridge-tied-load (BTL) speaker output from the output stage. Drives the other terminal of the loudspeaker directly (filterless in Class-D mode); supports 2Ω/4Ω/8Ω loads.

Key specifications

Parameter	Value
Manufacturer	Shenzhen Nsiway Tech
Package	ESOP-8
Category	Op-amp/Cmp
Pins	8

CAD (KiCad official)

Symbol: NS4160
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ns4160.step`	193 KB	You want the bare part, or you mark your own boards.
`ns4160-etched.step`	1.2 MB	You want the part with `NS4160` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 311 faces against 63 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 Nsiway Tech datasheet (11 pp, sha256 d7dfcb07ef6f9aa8, 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