HT1308ARZ from HTCSEMI, 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	OUT1	output	Op-amp 1 output pin. Drives headphone channel 1 through an AC-coupling capacitor (typ. 100 µF) into a load (typ. 10 kΩ or headphone).
2	IN1-	input	Inverting input of op-amp 1. Feedback network from OUT1 sets channel-1 gain (application circuit uses 3.9 kΩ feedback resistors).
3	IN1+	input	Non-inverting input of op-amp 1. Biased to VREF (mid-supply) in the reference application circuit.
4	VSS	power_in	Negative power supply / ground reference for the device. Tied to system ground in single-supply operation.
5	IN2+	input	Non-inverting input of op-amp 2. Biased to VREF (mid-supply) in the reference application circuit.
6	IN2-	input	Inverting input of op-amp 2. Feedback network from OUT2 sets channel-2 gain (application circuit uses 3.9 kΩ feedback resistors).
7	OUT2	output	Op-amp 2 output pin. Drives headphone channel 2 through an AC-coupling capacitor (typ. 100 µF) into a load (typ. 10 kΩ or headphone).
8	VDD	power_in	Positive power supply pin. Decoupled with a bulk capacitor (typ. 100 µF) to VSS in the reference application circuit.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

HT1308ARZ

CAD (KiCad official)

Symbol: HT1308ARZ
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
`ht1308arz.step`	122 KB	You want the bare part, or you mark your own boards.
`ht1308arz-etched.step`	1.9 MB	You want the part with `HT1308ARZ` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 486 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: HTCSEMI datasheet (4 pp, sha256 fb577a378c60a1ba, 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