LM319DT 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	NC	unconnected	No connection. Leave floating or tie to ground; not internally bonded.
2	NC	unconnected	No connection. Leave floating or tie to ground; not internally bonded.
3	GND1	power_in	Ground reference for comparator 1's open-collector output stage. Isolated from ground 2 to allow output isolation from the system ground.
4	IN1+	input	Non-inverting input of comparator 1. Input common-mode range typically ±13 V (VCC = ±15 V); max input current 1 µA over operating temperature.
5	IN1-	input	Inverting input of comparator 1. Differential input voltage rating ±5 V; input bias current typ 250 nA (LM319).
6	VCC-	power_in	Negative supply rail, shared by both comparators. Rated to -25 V absolute max; use 0 V for single-supply operation from +5 V.
7	OUT2	output	Open-collector output of comparator 2. Rated to VO-VCC- = 36 V; can sink up to 25 mA; requires an external pull-up resistor.
8	GND2	power_in	Ground reference for comparator 2's open-collector output stage. Isolated from ground 1 to allow output isolation from the system ground.
9	IN2+	input	Non-inverting input of comparator 2. Input common-mode range typically ±13 V (VCC = ±15 V).
10	IN2-	input	Inverting input of comparator 2. Differential input voltage rating ±5 V; input bias current typ 250 nA (LM319).
11	VCC+	power_in	Positive supply rail, shared by both comparators. Rated to +18 V absolute max; typ positive supply current 8 mA at ±15 V.
12	OUT1	output	Open-collector output of comparator 1. Rated to VO-VCC- = 36 V; can sink up to 25 mA; requires an external pull-up resistor.
13	NC	unconnected	No connection. Leave floating or tie to ground; not internally bonded.
14	NC	unconnected	No connection. Leave floating or tie to ground; not internally bonded.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM319DT
LM319N
LM319DTLM119J
LM319DTLM219N

CAD (KiCad official)

Symbol: LM319DT
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
`lm319dt.step`	195 KB	You want the bare part, or you mark your own boards.
`lm319dt-etched.step`	1.7 MB	You want the part with `LM319DT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 444 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 (13 pp, sha256 e56b45c82b85bed4, 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