RS8521XF

@@ -0,0 +1,51 @@+# RS8521XF++**Jiangsu RUNIC Tech** · Precision OpAmps · SOT-23-5++RS8521XF from Jiangsu RUNIC Tech, in a SOT-23-5. 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 | OUT | output | Amplifier output. Rail-to-rail swing capable, typically within a few mV of either supply rail with a 10 kOhm load. Short-circuit current is approximately 25 mA typical. |+| 2 | V- | power_in | Negative supply rail. Ground in single-supply operation, or the negative rail for dual supplies. Absolute maximum V+ to V- is 7.0 V; operating range gives 2.5 V to 5.5 V total supply. |+| 3 | +IN | input | Non-inverting input. Rail-to-rail common-mode range from (V-)-0.1 V to (V+)+0.1 V. Input bias current is 10 pA typical (CMOS input). Input terminals are internally diode-clamped to the supplies. |+| 4 | -IN | input | Inverting input. Rail-to-rail common-mode range from (V-)-0.1 V to (V+)+0.1 V. Input bias current is 10 pA typical (CMOS input). Input terminals are internally diode-clamped to the supplies. |+| 5 | V+ | power_in | Positive supply rail. Operating range +2.5 V to +5.5 V (absolute maximum 7.0 V V+ to V-). Bypass with a 0.1 uF capacitor placed close to the pin per layout guidelines. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Jiangsu RUNIC Tech |+| Package | SOT-23-5 |+| Category | Op-amp/Cmp |+| Pins | 5 |++## Ordering variants++- `RS8521XFXF`+- `RS8521XFXK`+- `RS8521XFXM`+- `RS8521XFRS8522XK`+- `RS8521XFRS8522XM`+- `RS8521XFRS8523XN`+- `RS8521XFRS8524XP`+- `RS8521XFRS8524XQ`++## CAD (KiCad official)++- Symbol: `RS8521XF`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Jiangsu RUNIC Tech datasheet](docs/rs8521xf-datasheet.pdf) (14 pp, sha256 `15342dc49863196c`, 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/rs8521xf-datasheet.pdf)

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