# LM319DT

**STMicroelectronics** · Comparators · SOIC-14

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`

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Vo - VCC- Output to negative supply voltage | Vo - VCC- |  |  | 36 | V |  | 4 |
| Negative supply voltage | VCC- | -25 |  |  | V |  | 4 |
| Positive supply voltage | VCC+ |  |  | 18 | V |  | 4 |
| Differential input voltage | Vid | -5 |  | 5 | V |  | 4 |
| Input voltage | Vi | -15 |  | 15 | V | For supply voltages lower than ±15 V the absolute maximum input voltage is equal to the supply voltage | 4 |
| Maximum junction temperature | Tj |  |  | 150 | °C |  | 4 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 4 |
| ESD HBM human body model |  |  |  | 400 | V | Human body model | 4 |
| ESD MM machine model |  |  |  | 100 | V | Machine model | 4 |
| ESD CDM charged device model |  |  |  | 1500 | V | Charged device model | 4 |
| Supply voltage | VCC | 5 |  | 15 | V | 5 to ±15 V | 4 |
| Operating free-air temperature range (LM319) | Toper | 0 |  | 70 | °C | LM319 | 4 |
| Input offset voltage (Rs ≤ 5 kΩ) | Vio |  | 2 | 8 | mV | VCC = ±15 V, Tamb = +25 °C, Rs ≤ 5 kΩ | 5 |
| Input offset voltage over temperature | Vio |  |  | 10 | mV | Tmin ≤ Tamb ≤ Tmax, Rs ≤ 5 kΩ | 5 |
| Input offset current | Iio |  | 80 | 200 | nA | VCC = ±15 V, Tamb = +25 °C | 5 |
| Input offset current over temperature | Iio |  |  | 300 | nA | Tmin ≤ Tamb ≤ Tmax | 5 |
| Input bias current | Iib |  | 250 | 1000 | nA | VCC = ±15 V, Tamb = +25 °C | 5 |
| Input bias current over temperature | Iib |  |  | 1200 | nA | Tmin ≤ Tamb ≤ Tmax | 5 |
| Large signal voltage gain | Avd | 8 | 40 |  | V/mV | VCC = ±15 V, Tamb = +25 °C | 5 |
| Positive supply current | ICC+ |  | 8 | 12.5 | mA | VCC = ±15 V | 5 |
| Negative supply current | ICC- |  | 3 | 5 | mA | VCC = ±15 V, Tamb = +25 °C | 5 |
| Input common mode voltage range | Vicm | -12 | 13 |  | V | VCC = ±15 V | 5 |
| Input common mode voltage range | Vicm | 1 | 3 |  | V | VCC+ = +5 V, VCC- = 0 V | 5 |
| Low level output voltage | VOL |  |  | 0.75 | V | Io = 25 mA, Vi ≤ -5 mV | 5 |
| Low level output voltage | VOL |  |  | 1.5 | V | Io = 25 mA, Tmin ≤ Tamb ≤ Tmax | 5 |
| Low level output voltage | VOL |  |  | 0.4 | V | VCC+ ≥ +4.5 V, VCC- = 0 V, Io(sink) < 3.2 mA, Vi ≤ -10 mV | 5 |
| High level output current | IOH |  |  | 10 | μA | Vo = +35 V, Tmin ≤ Tamb ≤ Tmax, Vi ≥ 5 mV | 5 |
| Low level output voltage | VOL |  | 0.3 |  | V | Io = 25 mA, Vi ≤ -10 mV | 5 |
| Positive supply current | ICC+ |  | 4.3 |  | mA | VCC+ = +5 V, VCC- = 0 V | 5 |
| High level output current | IOH |  | 0.2 |  | μA | Vo = +35 V, Vi ≥ 5 mV | 5 |
| Response time | tres |  | 80 |  | ns | 100 mV input step with 5 mV overdrive | 5 |
| Thermal resistance junction to ambient (SO-14) | Rthja |  | 105 |  | °C/W | Typical value | 4 |
| Thermal resistance junction to case (SO-14) | Rthjc |  | 31 |  | °C/W | Typical value | 4 |

## CAD (KiCad official)

- Symbol: `LM319DT`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `lm319dt-etched.step` / `lm319dt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm319dt.step` / `lm319dt.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`lm319dt.step`](lm319dt.step) | 195 KB | You want the bare part, or you mark your own boards. |
| [`lm319dt-etched.step`](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](https://www.st.com/resource/en/datasheet/lm319dt.pdf) (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](docs/lm319dt-datasheet.pdf)