LM139DR from Texas Instruments, 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	1OUT	output	Open-collector output of comparator 1. Requires an external pull-up resistor to VCC (or another rail up to 36 V). Sinks up to 20 mA (16 mA guaranteed).
2	2OUT	output	Open-collector output of comparator 2. Requires an external pull-up resistor. Sinks up to 20 mA.
3	VCC	power_in	Positive supply. Single-supply operation from 2 V to 30 V (LM139/LM339/LM239/LM2901) or split supplies up to ±15 V. Absolute maximum 36 V.
4	2IN-	input	Inverting (negative) input of comparator 2. Common-mode range includes ground; input voltage range -0.3 V to 36 V.
5	2IN+	input	Non-inverting (positive) input of comparator 2. Common-mode range includes ground; input voltage range -0.3 V to 36 V.
6	1IN-	input	Inverting (negative) input of comparator 1. Common-mode range includes ground; input voltage range -0.3 V to 36 V.
7	1IN+	input	Non-inverting (positive) input of comparator 1. Common-mode range includes ground; input voltage range -0.3 V to 36 V.
8	3IN-	input	Inverting (negative) input of comparator 3. Common-mode range includes ground.
9	3IN+	input	Non-inverting (positive) input of comparator 3. Common-mode range includes ground.
10	4IN-	input	Inverting (negative) input of comparator 4. Common-mode range includes ground.
11	4IN+	input	Non-inverting (positive) input of comparator 4. Common-mode range includes ground.
12	GND	power_in	Ground / negative supply. In single-supply operation this pin is tied to system ground.
13	4OUT	output	Open-collector output of comparator 4. Requires an external pull-up resistor.
14	3OUT	output	Open-collector output of comparator 3. Requires an external pull-up resistor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM139DR
LM139DRD
LM139DRN
LM139DRPW
LM139DRPWR
LM139DRNS
LM139DRDB
LM139DRDBR
LM139DRRTE

CAD (KiCad official)

Symbol: LM139DR
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (53 pp, sha256 b8b91e2b545800b8, 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