TS321ILT 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. Class-AB output stage delivers up to ~40 mA source and ~20 mA sink (at Vcc+=15 V, Vo=2 V). Short-circuit protected (short-circuit-to-ground current ~40 mA typ, 60 mA max at Vcc+=15 V). Stable with high capacitive loads.
2	VCC-	power_in	Negative supply rail / ground. For single-supply operation tie to GND; for dual-supply operation connect to the negative rail (down to -15 V). Total supply span Vcc+ - Vcc- must be between 3 V and 30 V.
3	Non-inverting input	input	Non-inverting (+) input of the op amp. Input bias current 20 nA typ (150 nA max). Input common-mode range includes ground: 0 V to (Vcc+)-1.5 V at 25 °C. Absolute input voltage range -0.3 V to 32 V; differential input voltage ±32 V max.
4	Inverting input	input	Inverting (-) input of the op amp. Input bias current 20 nA typ (150 nA max), input offset current 2 nA typ (30 nA max). Same absolute limits as the non-inverting input (-0.3 V to 32 V, differential ±32 V).
5	VCC+	power_in	Positive supply rail. Operating range 3 to 30 V single-supply (or up to ±15 V dual-supply); absolute max ±16/32 V total. Quiescent supply current 500 µA typ at Vcc+=5 V (800 µA max), 600 µA typ at Vcc+=30 V. Bypass locally to VCC- with a decoupling capacitor.

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.

TS321ILT

CAD (KiCad official)

Symbol: TS321ILT
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ts321ilt.step`	85 KB	You want the bare part, or you mark your own boards.
`ts321ilt-etched.step`	1.4 MB	You want the part with `TS321ILT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 356 faces against 102 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 (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