RS6331BPXF from Jiangsu RUNIC Tech, 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	+IN	input	Non-inverting analog input. Rail-to-rail common-mode input range from -0.1V to +5.6V (with Vs=5.5V). Input bias current ~10pA typical. Diode-clamped to the supply rails; limit external current to ≤10mA if inputs swing more than 0.5V beyond the rails.
2	V-	power_in	Negative supply rail (or ground in single-supply operation). Total supply V+ to V- must be between 2.1V and 5.5V; absolute maximum 7.0V. Place a 0.1µF bypass capacitor close to the pin.
3	-IN	input	Inverting analog input. Rail-to-rail common-mode input range from -0.1V to +5.6V (with Vs=5.5V). Input bias current ~10pA typical. Diode-clamped to the supply rails; limit external current to ≤10mA if inputs swing more than 0.5V beyond the rails.
4	OUT	output	Op-amp output. Rail-to-rail swing (typ. 25mV from rail into 2kΩ, 8mV from rail into 10kΩ). Output source current up to ~120mA typical. Unity-gain stable.
5	V+	power_in	Positive supply rail. Operating range 2.1V to 5.5V referenced to V-; absolute maximum 7.0V. Place a 0.1µF bypass capacitor close to the pin.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	SOT-23-5
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

RS6331BPXF
RS6331BPXFBPXC5
RS6331BPXFPXC5

CAD (KiCad official)

Symbol: RS6331BPXF
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Jiangsu RUNIC Tech datasheet (14 pp, sha256 d8e4258f5cf8d7eb, 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