LM239DT from STMicroelectronics, in a SOIC-14. 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	OUT2	output	Open-collector output of comparator 2. Requires an external pull-up resistor to a positive rail (typ. up to 36 V). Sinks up to ~16 mA when active.
2	OUT1	output	Open-collector output of comparator 1. Requires an external pull-up resistor to a positive rail. Sinks up to ~16 mA when active.
3	VCC+	power_in	Positive supply rail. Single-supply operation from 2 V to 36 V, or split-supply operation up to ±18 V. Shared by all four comparators.
4	IN1-	input	Inverting input of comparator 1. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
5	IN1+	input	Non-inverting input of comparator 1. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
6	IN2-	input	Inverting input of comparator 2. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
7	IN2+	input	Non-inverting input of comparator 2. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
8	IN3+	input	Non-inverting input of comparator 3. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
9	IN3-	input	Inverting input of comparator 3. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
10	IN4+	input	Non-inverting input of comparator 4. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
11	IN4-	input	Inverting input of comparator 4. Common-mode range extends from GND (V-) up to VCC+ - 1.5 V.
12	GND	power_in	Ground / negative supply rail (V-). Tied to 0 V for single-supply operation or to the negative rail for split-supply operation.
13	OUT4	output	Open-collector output of comparator 4. Requires an external pull-up resistor to a positive rail. Sinks up to ~16 mA when active.
14	OUT3	output	Open-collector output of comparator 3. Requires an external pull-up resistor to a positive rail. Sinks up to ~16 mA when active.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOIC-14
Category	Op-amp/Cmp
Pins	14

Ordering variants

Same part, different packaging or reel option.

LM239DT
LM239DTN
LM239DTPT

CAD (KiCad official)

Symbol: LM239DT
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm239dt.step`	195 KB	You want the bare part, or you mark your own boards.
`lm239dt-etched.step`	1.8 MB	You want the part with `LM239DT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 464 faces against 237 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 (19 pp, sha256 5adc47258717f516, 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