MC33178DR2G from onsemi, in a SOIC-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	Output of amplifier 1. Class-AB NPN output stage capable of driving 600 Ω loads with output swing typically ±13.6 V on ±15 V supplies. Short-circuit source/sink current typ ±80/±100 mA.
2	IN1-	input	Inverting input of amplifier 1. High-impedance PNP input (Rin ≈ 200 kΩ differential); input bias current typ 100 nA, offset current typ 5.0 nA. Common-mode input range typ −14 V to +14 V on ±15 V rails.
3	IN1+	input	Non-inverting input of amplifier 1. High-impedance PNP input matched to IN1−; ESD-clamped for ruggedness without affecting device performance.
4	VEE	power_in	Negative supply rail. Split-supply range −2.0 V to −18 V (±2.0 V to ±18 V dual-supply operation). Absolute maximum VCC to VEE = 36 V.
5	IN2+	input	Non-inverting input of amplifier 2. High-impedance PNP input; identical characteristics to IN1+.
6	IN2-	input	Inverting input of amplifier 2. High-impedance PNP input matched to IN2+; input bias current typ 100 nA.
7	OUT2	output	Output of amplifier 2. Class-AB NPN output stage; drives 600 Ω loads with ±13.6 V swing typ on ±15 V supplies.
8	VCC	power_in	Positive supply rail. Split-supply range +2.0 V to +18 V (±2.0 V to ±18 V dual-supply operation). Total quiescent current typ 420 µA per amplifier (max 1.4 mA for dual at 25°C).

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOIC-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

MC33178DR2GD
MC33178DR2GDG
MC33178DR2G
MC33178DR2GP
MC33178DR2GPG
MC33178DR2GDMR2
MC33178DR2GDMR2G
MC33178DR2GDTBR2G

CAD (KiCad official)

Symbol: MC33178DR2G
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mc33178dr2g.step`	122 KB	You want the bare part, or you mark your own boards.
`mc33178dr2g-etched.step`	2.5 MB	You want the part with `MC33178DR2G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 606 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: onsemi datasheet (19 pp, sha256 e9500a8ace2effd1, retrieved 2026-08-17, tier: manufacturer)
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