RS124XP from Jiangsu RUNIC Tech, 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	OUT A	output	Amplifier A output. Rail-to-rail output, typical short-circuit current 25mA, output swing to within 3mV of the supply rails with RL=2kΩ.
2	-IN A	input	Amplifier A inverting input. Rail-to-rail input, common-mode range −0.1V to (V+)+0.5V (max 5.6V at Vs=5.5V). Input bias current ~1pA typical.
3	+IN A	input	Amplifier A non-inverting input. Rail-to-rail input, common-mode range −0.1V to (V+)+0.5V.
4	+IN B	input	Amplifier B non-inverting input. Rail-to-rail input, common-mode range −0.1V to (V+)+0.5V.
5	-IN B	input	Amplifier B inverting input. Rail-to-rail input, common-mode range −0.1V to (V+)+0.5V.
6	OUT B	output	Amplifier B output. Rail-to-rail output, typical short-circuit current 25mA.
7	V-	power_in	Negative supply / ground. Single-supply range 2.5V to 5.5V referenced to V+; absolute max V+ to V- is 7.0V. Common ground for all four amplifiers.
8	V+	power_in	Positive supply. Operating range 2.5V to 5.5V (single supply) or ±1.25V to ±2.75V (dual). Bypass with 0.1µF ceramic close to the pin as recommended in the application notes.
9	OUT C	output	Amplifier C output. Rail-to-rail output, typical short-circuit current 25mA.
10	-IN C	input	Amplifier C inverting input. Rail-to-rail input.
11	+IN C	input	Amplifier C non-inverting input. Rail-to-rail input.
12	+IN D	input	Amplifier D non-inverting input. Rail-to-rail input.
13	-IN D	input	Amplifier D inverting input. Rail-to-rail input.
14	OUT D	output	Amplifier D output. Rail-to-rail output, typical short-circuit current 25mA.

Key specifications

Parameter	Value
Manufacturer	Jiangsu RUNIC Tech
Package	SOIC-14
Category	Op-amp/Cmp
Pins	14

Ordering variants

Same part, different packaging or reel option.

RS124XP
RS124XPXQ

CAD (KiCad official)

Symbol: RS124XP
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`rs124xp.step`	195 KB	You want the bare part, or you mark your own boards.
`rs124xp-etched.step`	1.9 MB	You want the part with `RS124XP` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 483 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: Jiangsu RUNIC Tech datasheet (13 pp, sha256 eef6c56a4eb774fa, 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