LM2903MX
Public Unreviewedby Ray
Texas Instruments Comparators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownLM2903MX
Texas Instruments · Comparators · SOIC-8
LM2903MX from Texas Instruments, in a SOIC-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 | OUTA | output | Comparator A open-collector output. Requires an external pull-up resistor to a positive supply (typically 3-15 kΩ to VCC). Output sinks current when the non-inverting input is below the inverting input. |
| 2 | OUTB | output | Comparator B open-collector output. Requires an external pull-up resistor to a positive supply. Output sinks current when the non-inverting input is below the inverting input. |
| 3 | VCC | power_in | Positive supply voltage. Single-supply operation from 2 V to 36 V, or split supplies of ±1 V to ±18 V. |
| 4 | IN-B | input | Inverting input of comparator B. High-impedance differential input; input common-mode range extends from GND to VCC-1.5 V. |
| 5 | IN+B | input | Non-inverting input of comparator B. High-impedance differential input; input common-mode range extends from GND to VCC-1.5 V. |
| 6 | IN-A | input | Inverting input of comparator A. High-impedance differential input; input common-mode range extends from GND to VCC-1.5 V. |
| 7 | IN+A | input | Non-inverting input of comparator A. High-impedance differential input; input common-mode range extends from GND to VCC-1.5 V. |
| 8 | GND | power_in | Ground / negative supply. Connect to 0 V in single-supply operation or to the negative rail in split-supply operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
LM2903MXDRLM2903MXDTLM2903MXDGKRLM2903MXPWR
CAD (KiCad official)
- Symbol:
LM2903MX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
lm2903mx.step |
122 KB | You want the bare part, or you mark your own boards. |
lm2903mx-etched.step |
1.8 MB | You want the part with LM2903MX already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 446 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: Texas Instruments datasheet (31 pp, sha256
66ed4498e45e43a3, retrieved 2026-08-17, tier: manufacturer) - 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).