component

RS8551XK

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by Ray

Jiangsu RUNIC Tech Precision OpAmps, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

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RS8551XK

Jiangsu RUNIC Tech · Precision OpAmps · SOP-8

RS8551XK from Jiangsu RUNIC Tech, in a SOP-8. 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 NC unconnected No internal connection. Leave floating or tie to a static potential; there is no die bond to this lead.
2 -IN input Inverting input of the op amp. High-impedance CMOS input; common-mode range extends from (V−) − 0.1 V to (V+) + 0.1 V (rail-to-rail input). Typical bias current 50 pA.
3 +IN input Non-inverting input of the op amp. High-impedance CMOS input with rail-to-rail common-mode range ((V−) − 0.1 V to (V+) + 0.1 V). Input clamp diodes to the supplies limit external drive to ±10 mA.
4 V- power_in Negative supply rail. Connect to ground for single-supply operation, or to the negative rail for dual-supply operation. Total supply (V+ − V−) must be between 2.7 V and 5.5 V (7.0 V absolute maximum).
5 NC unconnected No internal connection. Leave floating or tie to a static potential; there is no die bond to this lead.
6 OUT output Rail-to-rail op amp output. Swings within a few mV of each supply rail into 10 kΩ (VOH ≥ 4.98 V, VOL ≤ 10 mV at Vs = 5 V, RL = 10 kΩ to opposite rail). Short-circuit current typically 50 mA.
7 V+ power_in Positive supply rail. Place a 0.1 µF decoupling capacitor close to this pin, referenced to V−. Operating range 2.7 V to 5.5 V above V− (7.0 V absolute maximum).
8 NC unconnected No internal connection. Leave floating or tie to a static potential; there is no die bond to this lead.

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package SOP-8
Category Op-amp/Cmp
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • RS8551XK
  • RS8551XKXM
  • RS8551XKXF
  • RS8552XK
  • RS8553XN
  • RS8554XP
  • RS8554XQ

CAD (KiCad official)

  • Symbol: RS8551XK
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
rs8551xk.step 122 KB You want the bare part, or you mark your own boards.
rs8551xk-etched.step 2.0 MB You want the part with RS8551XK already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 482 faces against 147 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 (14 pp, sha256 b3b02c9fa92c42d7, 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