RS8905BXM

@@ -0,0 +1,48 @@+# RS8905BXM++**Jiangsu RUNIC Tech** · Comparators · MSOP-8++RS8905BXM from Jiangsu RUNIC Tech, in a MSOP-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 | INA+ | input | Noninverting input of comparator A. Rail-to-rail CMOS input; common-mode range extends from (V-)-0.1V to (V+)+0.1V. Input bias current 1pA typ (10pA max). |+| 2 | INA- | input | Inverting input of comparator A. Rail-to-rail CMOS input; input signals that swing more than 0.5V beyond the supply rails must be current-limited to 10mA or less. |+| 3 | INB+ | input | Noninverting input of comparator B. Rail-to-rail CMOS input; common-mode range (V-)-0.1V to (V+)+0.1V. |+| 4 | INB- | input | Inverting input of comparator B. Rail-to-rail CMOS input; input bias current is essentially leakage of the input protection diodes (~1pA typ). |+| 5 | V- | power_in | Negative (lowest) power supply. Tie to GND for single-supply operation (Vs = 1.4V to 5.5V) or to the negative rail for dual-supply operation (±0.7V to ±2.75V). |+| 6 | OUTB | output | Comparator B push-pull rail-to-rail output. Can source up to 38mA and sink up to 42mA at Vs=5V; output must be current-limited to ±55mA. Output swing typ 140mV from V+ and 85mV from V- at Io=2.5mA, Vs=5V. |+| 7 | OUTA | output | Comparator A push-pull rail-to-rail output. Directly interfaces with TTL/CMOS logic; propagation delay ~9µs with 100mV overdrive at Vs=1.4V. |+| 8 | V+ | power_in | Positive (highest) power supply. Operating range 1.4V to 5.5V (single supply). Quiescent current 400nA typ per channel (1500nA max). Bypass with a local ceramic capacitor to V-. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Jiangsu RUNIC Tech |+| Package | MSOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## Ordering variants++- `RS8905BXM`+- `RS8905BXMXK`++## CAD (KiCad official)++- Symbol: `RS8905BXM`+- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`+- 3D model: MSOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Jiangsu RUNIC Tech datasheet](docs/rs8905bxm-datasheet.pdf) (11 pp, sha256 `93a9dcd2bb90565a`, 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/rs8905bxm-datasheet.pdf)

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