LM2903DR

@@ -0,0 +1,49 @@+# LM2903DR++**UMW** · Comparators · SOP-8++LM2903DR from UMW, 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 | OUTA | output | Comparator A open-collector output. Requires an external pull-up resistor to VCC (or another supply). Can sink up to ~20 mA continuously; output saturation voltage typ 150 mV / max 400 mV at I_sink ≤ 4 mA. |+| 2 | INA- | input | Comparator A inverting input. Input bias current typ 25 nA (max 250 nA at 25 °C). Common-mode range extends from GND up to VCC−1.5 V. Absolute input voltage must remain ≥ −0.3 V of ground/V−. |+| 3 | INA+ | input | Comparator A non-inverting input. Same electrical characteristics as INA−: bias ~25 nA typ, common-mode range 0 V to VCC−1.5 V, differential input voltage range up to VCC. |+| 4 | GND | power_in | Negative supply / ground reference (V−). For single-supply operation tie to 0 V; for split-supply operation connect to the negative rail (down to −15 V relative to V+). |+| 5 | INB+ | input | Comparator B non-inverting input. Bias ~25 nA typ, common-mode range 0 V to VCC−1.5 V; must stay ≥ −0.3 V of V−. |+| 6 | INB- | input | Comparator B inverting input. Same electrical characteristics as the A-side inputs: bias ~25 nA typ, offset ±5 mV max, common-mode range 0 V to VCC−1.5 V. |+| 7 | OUTB | output | Comparator B open-collector output. Requires an external pull-up resistor. Sink current up to ~20 mA; V_OL typ 150 mV at 4 mA sink. |+| 8 | VCC | power_in | Positive supply. Single-supply range 2.0 V to 36 V, or +V rail of a split ±1.0 V to ±15 V supply. Absolute maximum 36 V (single) / ±18 V (split). Quiescent current typ 0.4 mA (1 mA max) with both comparators unloaded. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## Ordering variants++- `LM2903DRDR`+- `LM2903DRPT`+- `LM2903DRPWR`++## CAD (KiCad official)++- Symbol: `LM2903DR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](docs/lm2903dr-datasheet.pdf) (11 pp, sha256 `a1043fb752b1d7b1`, 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](docs/lm2903dr-datasheet.pdf)

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