component
LR2903D
Public Unreviewedby Ray
LRC Comparators, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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
markdownLR2903D
LRC · Comparators · SOP-8
LR2903D from LRC, 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 | OUT1 | output | Comparator 1 open-collector output. Sinks up to 6 mA (VOL=1.5 V, VID=-1 V typ); low-level output voltage 400 mV max at IOL=4 mA. Requires an external pull-up resistor to VCC. |
| 2 | IN1(-) | input | Comparator 1 inverting input. Common-mode range 0 to VCC-1.5 V (25 °C). Input bias current typ -25 nA; input offset voltage 2 mV typ, 5 mV max at 25 °C. |
| 3 | IN1(+) | input | Comparator 1 non-inverting input. Common-mode range 0 to VCC-1.5 V (25 °C); either input may go up to 30 V without damage but must not go below -0.3 V. |
| 4 | GND | power_in | Ground / negative supply return. Single-supply operation ties this to 0 V; split-supply operation ties this to the negative rail. |
| 5 | IN2(+) | input | Comparator 2 non-inverting input. Common-mode range 0 to VCC-1.5 V (25 °C); may go up to 30 V without damage. |
| 6 | IN2(-) | input | Comparator 2 inverting input. Common-mode range 0 to VCC-1.5 V (25 °C); input bias current typ -25 nA. |
| 7 | OUT2 | output | Comparator 2 open-collector output. Same drive characteristics as OUT1; requires an external pull-up resistor to VCC. |
| 8 | VCC | power_in | Positive supply. Operates from 5 V to 30 V (single supply) with low supply current independent of VCC (0.8 mA typ at VCC=5 V, 2.5 mA max full range at VCC=30 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOP-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
LR2903DD
CAD (KiCad official)
- Symbol:
LR2903D - 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 |
|---|---|---|
lr2903d.step |
122 KB | You want the bare part, or you mark your own boards. |
lr2903d-etched.step |
1.8 MB | You want the part with LR2903D already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 443 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: LRC datasheet (5 pp, sha256
036bd30c19cea004, 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).