HG8552CM from HGSEMI, 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	OUTA	output	Amplifier A output. Rail-to-rail CMOS output; can swing to within ~5 mV of the supply rails with light loads (>100 kOhm) and ~60 mV at 10 kOhm. Short-circuit limit typically 43 mA.
2	INA-	input	Amplifier A inverting input. High-impedance CMOS input; typical bias current 20 pA. Input voltage range: Vss-0.5 V to Vdd+0.5 V (absolute max); common-mode range extends 100 mV beyond the supply rails.
3	INA+	input	Amplifier A non-inverting input. High-impedance CMOS input; typical bias current 20 pA. Rail-to-rail input, Vss-0.1 V to Vdd+0.1 V common-mode range.
4	VSS	power_in	Negative supply / ground. For single-supply operation tie to GND; for dual-supply operation apply the negative rail (±1.05 V to ±2.75 V). Absolute max VDD-VSS = 7.5 V.
5	INB+	input	Amplifier B non-inverting input. High-impedance CMOS input; typical bias current 20 pA. Rail-to-rail input, Vss-0.1 V to Vdd+0.1 V common-mode range.
6	INB-	input	Amplifier B inverting input. High-impedance CMOS input; typical bias current 20 pA. Input voltage range: Vss-0.5 V to Vdd+0.5 V (absolute max).
7	OUTB	output	Amplifier B output. Rail-to-rail CMOS output; can swing to within ~5 mV of the supply rails with light loads (>100 kOhm) and ~60 mV at 10 kOhm. Short-circuit limit typically 43 mA.
8	VDD	power_in	Positive supply. Operating range 2.1 V to 5.5 V single-supply (or ±1.05 V to ±2.75 V dual-supply). Bypass with a 0.1 uF ceramic capacitor located close to the pin. Quiescent current 320 uA per amplifier.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

HG8552CM/TR
HG8552CMIM/TR
HG8552CMM/TR
HG8552CMIMM/TR
HG8552CMCDQ/TR
HG8552CMCDQ3/TR
HG8552CMIDQ/TR
HG8552CMIDQ3/TR

CAD (KiCad official)

Symbol: HG8552CM
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
`hg8552cm.step`	122 KB	You want the bare part, or you mark your own boards.
`hg8552cm-etched.step`	2.0 MB	You want the part with `HG8552CM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 481 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: HGSEMI datasheet (13 pp, sha256 b9f0386d7c47e332, 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