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RS331XF

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Jiangsu RUNIC Tech Comparators, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentop-amp-cmprs331xf
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Contents

README

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RS331XF

Jiangsu RUNIC Tech · Comparators · SOT-23-5

RS331XF 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 Noninverting comparator input. Common-mode range extends from (V-)-0.1V to (V+)+0.1V; input bias current 1pA typ, 10pA max. Diode-clamped to supply rails - limit external swing beyond rails to ±10mA.
2 V- power_in Negative (lowest) power supply pin. Tied to ground for single-supply operation (Vs = 1.8V to 5.5V), or to a negative rail for dual-supply operation (±0.9V to ±2.75V).
3 -IN input Inverting comparator input. Common-mode range extends from (V-)-0.1V to (V+)+0.1V; input bias current 1pA typ, 10pA max. Diode-clamped to supply rails - limit external swing beyond rails to ±10mA.
4 OUT output Open-drain comparator output. Requires external pull-up resistor (VOH pull-up range up to 5.6V). VSAT ≈150mV typ at IO≤4mA; sink capability 27mA typ at Vs=5V; leakage 0.01nA typ. Output diode-clamped to rails - external signals must stay within ±0.5V of rails and ±55mA.
5 V+ power_in Positive (highest) power supply pin. Single-supply 1.8V to 5.5V (absolute max 7V vs V-). Bypass locally with 100nF ceramic to V-.

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.

  • RS331XF
  • RS331XFXK
  • RS331XFXP
  • RS331XFXQ

CAD (KiCad official)

  • Symbol: RS331XF
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: rs331xf-etched.step / rs331xf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rs331xf.step / rs331xf.glb are the bare package body.

Provenance

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

  • Datasheet: Jiangsu RUNIC Tech datasheet (16 pp, sha256 92fbba6bb4adde8a, 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