component
LM2903 Dual Comparator
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Dual differential comparator with open-collector outputs, single or split supply.
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README.md+50−2@@ -1,5 +1,53 @@ # LM2903 -Dual voltage comparator, open-collector output, DIP-8+**Texas Instruments** · Comparator · SOIC-8 -The LM2903 is a dual voltage comparator from TI with open-collector outputs. Operates from single 2V-36V or dual ±1V-18V supplies. Open-collector outputs can sink up to 16mA for driving LEDs or logic.+The LM2903 is a dual differential comparator with open-collector outputs, able to run from a single 2 V to 36 V supply or a split supply. The open-collector outputs wire-OR and interface to different logic rails through a pull-up. It is the wider-temperature-range sibling of the LM393, common in threshold detection and level sensing.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | 1OUT | output | Output pin of comparator 1. Open-collector output; requires an external pull-up resistor to VCC. Compatible with TTL, MOS, and CMOS logic. Low-level output voltage typically 110 mV (400 mV max) at ISINK ≤ 4 mA. |+| 2 | 1IN- | input | Inverting (negative) input of comparator 1. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max). |+| 3 | 1IN+ | input | Non-inverting (positive) input of comparator 1. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max). |+| 4 | GND | power_in | Ground (V-). Negative supply / reference for both comparators. Connect to system ground for single-supply operation. |+| 5 | 2IN+ | input | Non-inverting (positive) input of comparator 2. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max). |+| 6 | 2IN- | input | Inverting (negative) input of comparator 2. Common-mode input range extends from V- (ground) up to (V+) - 2.0V. Input bias current typically -3.5 nA (-25 nA max). |+| 7 | 2OUT | output | Output pin of comparator 2. Open-collector output; requires an external pull-up resistor to VCC. Compatible with TTL, MOS, and CMOS logic. Low-level output voltage typically 110 mV (400 mV max) at ISINK ≤ 4 mA. |+| 8 | VCC | power_in | Positive supply (V+). Operating range 2V to 30V (LM2903), absolute maximum 36V. Quiescent current typically 400 µA (600 µA max) at VS = 5V, no load. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Dual differential comparator |+| Output | Open-collector |+| Supply voltage | 2 V to 36 V single, or +-1 V to +-18 V |+| Input offset voltage | 2 mV typ |+| Response time | 1.5 us typ |+| Operating temperature | -40 C to 125 C |++## Ordering variants++- `LM2903D`+- `LM2903DGK`+- `LM2903P`+- `LM2903PS`+- `LM2903PW`++## CAD (KiCad official)++- Symbol: `lm2903.kicad_sym`+- Footprint: `lm2903.kicad_mod`+- 3D model: SOIC-8 body from KiCad `Package_SO/SOIC-8_3.9x4.9mm_P1.27mm`.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm2903.pdf) (56 pp, sha256 `24c6b3c03dd65dfd`, 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).++[Datasheet PDF](docs/lm2903-datasheet.pdf)
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package.jsonadded+30@@ -0,0 +1,30 @@+{+ "slug": "lm2903",+ "version": "0.1.0",+ "type": "component",+ "description": "Dual differential comparator with open-collector outputs, single or split supply.",+ "tags": [+ "comparator",+ "dual",+ "open-collector",+ "single-supply",+ "ti",+ "soic-8"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm2903.kicad_sym",+ "lm2903.kicad_mod",+ "lm2903.glb",+ "docs/hero.png",+ "docs/lm2903-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ]+}
page.json+27−7@@ -4,8 +4,15 @@ "slug": "lm2903", "title": "LM2903", "brief": "Dual voltage comparator, open-collector output, DIP-8",- "version": "1.0.0",- "tags": [],+ "version": "0.1.0",+ "tags": [+ "comparator",+ "dual",+ "open-collector",+ "single-supply",+ "ti",+ "soic-8"+ ], "license": "MIT", "component": { "mpn": "LM2903",@@ -20,18 +27,31 @@ }, "readme": "# LM2903\n\nDual voltage comparator, open-collector output, DIP-8\n\nThe LM2903 is a dual voltage comparator from TI with open-collector outputs. Operates from single 2V-36V or dual ±1V-18V supplies. Open-collector outputs can sink up to 16mA for driving LEDs or logic.", "author": {- "id": "695820315b5f1e4db2fcf602", "name": "Kyle Bergstedt", "email": "[email protected]" },- "visibility": {- "public": true+ "visibility": "public",+ "hero": {+ "type": "image",+ "path": "docs/hero.png" },- "hero": null, "sample_prompts": [], "discovery_triggers": [], "discovery_pitch": null, "metadata": {}, "created_at": "2026-05-28T05:33:40.852Z",- "updated_at": "2026-05-28T05:33:40.852Z"+ "updated_at": "2026-05-28T05:33:40.852Z",+ "description": "Dual differential comparator with open-collector outputs, single or split supply.",+ "dependencies": {},+ "files": [+ "page.json",+ "README.md",+ "lm2903.kicad_sym",+ "lm2903.kicad_mod",+ "lm2903.glb",+ "docs/hero.png",+ "docs/lm2903-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ] }