# TS321AILT

**STMicroelectronics** · Operational Amplifier · SOT-23-5

TS321AILT from STMicroelectronics, in a SOT-23-5. 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 | Output | output | Op-amp output. Delivers up to ~40 mA source / 20 mA sink (Vcc = 15 V); short-circuit current to ground ~40-60 mA. High-level output reaches VCC+ − 1.5 V (typ) and low-level output ≤ 15 mV into 10 kΩ. Output is stable with high capacitive loads. |
| 2 | VCC- | power_in | Negative supply / ground pin. Tied to ground in single-supply operation (3 to 30 V on VCC+) or to a negative rail down to −15 V in dual-supply operation. |
| 3 | Non-inverting input | input | Non-inverting (+) input to the op-amp. Input common-mode range includes VCC- (ground in single-supply use) and extends up to (VCC+ − 1.5 V). Input bias current ~20 nA typ; differential input voltage rating ±32 V. |
| 4 | Inverting input | input | Inverting (−) input to the op-amp. Same electrical properties as the non-inverting input: Vicm includes ground, Ib ≈ 20 nA typ, Vid rating ±32 V. Input offset voltage ≤ 2 mV max on the TS321A grade. |
| 5 | VCC+ | power_in | Positive supply pin. Operating range 3 to 30 V single-supply (or up to ±15 V dual-supply); absolute max 32 V (±16 V dual). Typical supply current 500 µA at VCC+ = 5 V, 600 µA at 30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5 |
| Category | Op-amp/Cmp |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `TS321AILT`
- `TS321ILT`

## CAD (KiCad official)

- Symbol: `TS321AILT`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ts321ailt-etched.step` / `ts321ailt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ts321ailt.step` / `ts321ailt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ts321ailt.pdf) (15 pp, sha256 `1d743613040dad8e`, 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/ts321ailt-datasheet.pdf)