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RS8905BXM

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Jiangsu RUNIC Tech Comparators, MSOP-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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RS8905BXM

Jiangsu RUNIC Tech · Comparators · MSOP-8

RS8905BXM from Jiangsu RUNIC Tech, in a MSOP-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 INA+ input Noninverting input of comparator A. Rail-to-rail CMOS input; common-mode range extends from (V-)-0.1V to (V+)+0.1V. Input bias current 1pA typ (10pA max).
2 INA- input Inverting input of comparator A. Rail-to-rail CMOS input; input signals that swing more than 0.5V beyond the supply rails must be current-limited to 10mA or less.
3 INB+ input Noninverting input of comparator B. Rail-to-rail CMOS input; common-mode range (V-)-0.1V to (V+)+0.1V.
4 INB- input Inverting input of comparator B. Rail-to-rail CMOS input; input bias current is essentially leakage of the input protection diodes (~1pA typ).
5 V- power_in Negative (lowest) power supply. Tie to GND for single-supply operation (Vs = 1.4V to 5.5V) or to the negative rail for dual-supply operation (±0.7V to ±2.75V).
6 OUTB output Comparator B push-pull rail-to-rail output. Can source up to 38mA and sink up to 42mA at Vs=5V; output must be current-limited to ±55mA. Output swing typ 140mV from V+ and 85mV from V- at Io=2.5mA, Vs=5V.
7 OUTA output Comparator A push-pull rail-to-rail output. Directly interfaces with TTL/CMOS logic; propagation delay ~9µs with 100mV overdrive at Vs=1.4V.
8 V+ power_in Positive (highest) power supply. Operating range 1.4V to 5.5V (single supply). Quiescent current 400nA typ per channel (1500nA max). Bypass with a local ceramic capacitor to V-.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • RS8905BXM
  • RS8905BXMXK

CAD (KiCad official)

  • Symbol: RS8905BXM
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
rs8905bxm.step 123 KB You want the bare part, or you mark your own boards.
rs8905bxm-etched.step 2.4 MB You want the part with RS8905BXM already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 576 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 (11 pp, sha256 93a9dcd2bb90565a, 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