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LM2903XK

Public Made by Adom

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Jiangsu RUNIC Tech Comparators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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LM2903XK

Jiangsu RUNIC Tech · Comparators · SOIC-8

LM2903XK from Jiangsu RUNIC Tech, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 OUTA output Channel A comparator output, open-drain, so it needs an external pull-up and can be wired-AND with other open-collector outputs.
2 -INA input Channel A inverting input; input terminals are diode-clamped to the supply rails and signals more than 0.3 V beyond the rails should be current-limited to 10 mA or less.
3 +INA input Channel A noninverting input; input terminals are diode-clamped to the supply rails and signals more than 0.3 V beyond the rails should be current-limited to 10 mA or less.
4 V- power_in Negative (lowest) power supply; for single-supply use this is the ground reference, and the common-mode input range extends down to V-.
5 +INB input Channel B noninverting input; input terminals are diode-clamped to the supply rails and signals more than 0.3 V beyond the rails should be current-limited to 10 mA or less.
6 -INB input Channel B inverting input; input terminals are diode-clamped to the supply rails and signals more than 0.3 V beyond the rails should be current-limited to 10 mA or less.
7 OUTB output Channel B comparator output, open-drain, so it needs an external pull-up and can be wired-AND with other open-collector outputs.
8 V+ power_in Positive (highest) power supply; supply range is 3.3 V to 32 V single-supply (V+ minus V-).

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package SOIC-8
Category Amplifiers/Comparators
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage, single-supply (recommended operating) VS 3.3 32 V Single-supply 6
Supply voltage, dual-supply (recommended operating) VS 1.65 16 V Dual-supply; printed as ±1.65 / ±16 V 6
Supply voltage, absolute maximum VS 36 V Supply, VS=(V+)-(V-) 6
Signal input pin current -10 10 mA Signal input pin (IN+, IN-) 6
Signal output pin current -55 55 mA Signal output pin 6
Operating free-air temperature range TA -40 125 °C Operating range 6
Junction temperature TJ -40 150 °C Junction 6
Storage temperature Tstg -65 150 °C Storage 6
Operating supply voltage range VS 3.3 32 V 8
Quiescent current IQ 110 180 uA VS=5V, no load 8
Quiescent current IQ 150 uA VS=32V, no load, TA=-40C to +125C 8
Input offset voltage VOS -3.5 0.8 3.5 mV VS=5V to 32V 8
Input offset voltage VOS -4 4 mV TA=-40C to +125C 8
Input bias current IB 10 50 pA TA=25C 8
Input bias current IB 100 nA TA=-40C to +125C 8
Input offset current IOS 10 50 pA TA=25C 8
Input offset current IOS 100 nA TA=-40C to +125C 8
Large signal differential voltage amplification AVD 50 200 V/mV VS=15V, Vo=1.4V to 11.4V, RL≥15k to (V+) 8
Low-level output voltage VOL 200 300 mV Isink≤4mA, VID=-1V 8
Output current (sinking) IOL 6 23 mA VO=1.5V; VID=-1V; VS=5V 8
High-level output leakage current IOH-LKG 400 nA (V+) =Vo=5V; VID=1V 8
High-level output leakage current IOH-LKG 500 nA (V+) =Vo=32V; VID=1V 8
Thermal resistance junction-to-ambient RθJA 123.6 °C/W SOIC-8(SOP-8) package 7
Thermal resistance junction-to-case (top) RθJC(top) 70.5 °C/W SOIC-8(SOP-8) package 7
Thermal resistance junction-to-board RθJB 66.7 °C/W SOIC-8(SOP-8) package 7
Junction-to-top characterization parameter ΨJT 23.5 °C/W SOIC-8(SOP-8) package 7
Junction-to-board characterization parameter ΨJB 78.1 °C/W SOIC-8(SOP-8) package 7

CAD (KiCad official)

  • Symbol: LM2903XK
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: lm2903xk-etched.step / lm2903xk-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2903xk.step / lm2903xk.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 0480b65ec8381005, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF