UA741CDT from STMicroelectronics, in a SO-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	OFFSET_NULL1	input	Offset null 1. Connect an external trim potentiometer between OFFSET_NULL1 (pin 1) and OFFSET_NULL2 (pin 5) with the wiper tied to VCC- to trim input offset voltage (typ 1 mV, max 5 mV at 25 °C).
2	IN-	input	Inverting input of the op-amp. High-impedance analog input (Ri typ 2 MΩ, min 0.3 MΩ). Common-mode input range ±12 V at VCC = ±15 V.
3	IN+	input	Non-inverting input of the op-amp. High-impedance analog input (Ri typ 2 MΩ, min 0.3 MΩ). Common-mode input range ±12 V at VCC = ±15 V.
4	VCC-	power_in	Negative supply rail. Typical dual-supply operation ±15 V; absolute maximum ±22 V. Total supply range 5 to 40 V.
5	OFFSET_NULL2	input	Offset null 2. Second terminal of the external offset-trim potentiometer (paired with OFFSET_NULL1 on pin 1, wiper to VCC-).
6	OUT	output	Op-amp output. Class-AB output stage with internal short-circuit protection; output swing ±14 V typical at RL = 10 kΩ and VCC = ±15 V; short-circuit current typ 25 mA.
7	VCC+	power_in	Positive supply rail. Typical dual-supply operation ±15 V; absolute maximum ±22 V. Total supply range 5 to 40 V; supply current typ 1.7 mA.
8	NC	unconnected	No internal connection. Leave floating or tie to any convenient net.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SO-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

UA741CDTD
UA741CDT
UA741CDTN
UA741CDTCN

CAD (KiCad official)

Symbol: UA741CDT
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ua741cdt.step`	122 KB	You want the bare part, or you mark your own boards.
`ua741cdt-etched.step`	1.4 MB	You want the part with `UA741CDT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 368 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: STMicroelectronics datasheet (11 pp, sha256 a9a423732c10edcf, 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