LM239ADT 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	Output2	output	Open-collector output of comparator 2. Requires an external pull-up resistor to a positive rail (typ. ≤ Vcc+). Low output saturation voltage 250 mV typ at Isink = 4 mA; sink up to ~20 mA short-circuit to Vcc+.
2	Output1	output	Open-collector output of comparator 1. Requires an external pull-up resistor. Same drive characteristics as Output2.
3	VCC+	power_in	Positive supply rail. Single-supply operation 2 to 36 V, or +Vcc in a split ±1 to ±18 V supply. Typ quiescent current 1.1 mA independent of Vcc.
4	Inverting input 1	input	Inverting (-) input of comparator 1. Common-mode range includes ground: 0 to (Vcc+ − 1.5) V. Input bias current 25 nA typ; input offset ±1 mV typ (±2 mV max for A grade).
5	Non-inverting input 1	input	Non-inverting (+) input of comparator 1. Common-mode range 0 to (Vcc+ − 1.5) V; differential input voltage rating ±36 V.
6	Inverting input 2	input	Inverting (-) input of comparator 2. Same electrical characteristics as input 1.
7	Non-inverting input 2	input	Non-inverting (+) input of comparator 2.
8	Inverting input 3	input	Inverting (-) input of comparator 3.
9	Non-inverting input 3	input	Non-inverting (+) input of comparator 3.
10	Inverting input 4	input	Inverting (-) input of comparator 4.
11	Non-inverting input 4	input	Non-inverting (+) input of comparator 4.
12	VCC-	power_in	Negative supply / ground rail. Tie to GND in single-supply operation, or to −Vcc in a split ±1 to ±18 V supply.
13	Output4	output	Open-collector output of comparator 4. Requires external pull-up.
14	Output3	output	Open-collector output of comparator 3. Requires external pull-up.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM239ADT
LM239ADTD
LM239ADTPT
LM239ADTQT

CAD (KiCad official)

Symbol: LM239ADT
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
`lm239adt.step`	195 KB	You want the bare part, or you mark your own boards.
`lm239adt-etched.step`	1.9 MB	You want the part with `LM239ADT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 490 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