COS1333TR from COSINE, 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	OUT	output	Amplifier output. Rail-to-rail output stage; voltage swing extends to within ~5 mV of each supply rail with RL = 100 kΩ (15 mV with RL = 10 kΩ). Short-circuit current ±7 mA.
2	-Vs	power_in	Negative supply / ground. Single-supply operation ties this to GND; dual-supply operation uses ±0.9 V to ±2.75 V. Bypass with 0.1 µF ceramic close to the pin.
3	+IN	input	Non-inverting input of the amplifier. Common-mode voltage range extends rail-to-rail (-Vs - 0.3 V to +Vs + 0.3 V absolute; specified -0.1 V to +5.6 V at Vs = 5.5 V).
4	-IN	input	Inverting input of the amplifier. Voltage range extends from -Vs - 0.3 V to +Vs + 0.3 V. Input bias current typically ±25 pA.
5	+Vs	power_in	Positive supply, 1.8 V to 5.5 V (single-supply) or +0.9 V to +2.75 V (dual-supply). Bypass with a 0.1 µF ceramic capacitor as close to the pin as possible; add 2.2 µF tantalum for better performance.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

COS1333TRA
COS1333TRB
COS1333TRC
COS1333TRCOS2333SRA
COS1333TRCOS2333SRB
COS1333TRCOS2333SRC
COS1333TRCOS2333MRA
COS1333TRCOS2333MRB
COS1333TRCOS2333MRC
COS1333TRCOS4333SRA
COS1333TRCOS4333SRB
COS1333TRCOS4333SRC
COS1333TRCOS4333TRA
COS1333TRCOS4333TRB
COS1333TRCOS4333TRC

CAD (KiCad official)

Symbol: COS1333TR
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
`cos1333tr.step`	85 KB	You want the bare part, or you mark your own boards.
`cos1333tr-etched.step`	2.1 MB	You want the part with `COS1333TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 489 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: COSINE datasheet (12 pp, sha256 2acac72bb6342020, retrieved 2026-08-17, tier: lcsc)
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