LM239PT from STMicroelectronics, in a TSSOP-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. Pulls low when IN2+ < IN2-; requires external pull-up resistor to the desired logic-high rail (typ. 1 k-100 kΩ).
2	OUT1	output	Open-collector output of comparator 1. Pulls low when IN1+ < IN1-; requires external pull-up resistor.
3	VCC+	power_in	Positive supply. Single-supply 3 V to 36 V, or +side of ±1.5 V to ±18 V dual supply.
4	IN1-	input	Inverting input of comparator 1. Common-mode range includes ground (0 V to VCC-1.5 V).
5	IN1+	input	Non-inverting input of comparator 1. Common-mode range includes ground.
6	IN2-	input	Inverting input of comparator 2. Common-mode range includes ground.
7	IN2+	input	Non-inverting input of comparator 2. Common-mode range includes ground.
8	IN3+	input	Non-inverting input of comparator 3. Common-mode range includes ground.
9	IN3-	input	Inverting input of comparator 3. Common-mode range includes ground.
10	IN4+	input	Non-inverting input of comparator 4. Common-mode range includes ground.
11	IN4-	input	Inverting input of comparator 4. Common-mode range includes ground.
12	GND	power_in	Ground / negative supply. Tie to 0 V in single-supply operation, or to -1.5 V to -18 V in split-supply operation.
13	OUT4	output	Open-collector output of comparator 4. Requires external pull-up resistor.
14	OUT3	output	Open-collector output of comparator 3. Requires external pull-up resistor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM239PT
LM239PTD
LM239PTDT
LM239PTN

CAD (KiCad official)

Symbol: LM239PT
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)

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