# CBM8655AS8

**Corebai Microelectronics** · Precision OpAmps · SOP-8

CBM8655AS8 from Corebai Microelectronics, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | No connect; the datasheet marks this pin NC = NO CONNECT. |
| 2 | -IN | input | Inverting input of the rail-to-rail CMOS amplifier; input voltage range is 0 V to 5 V at VS = 5 V and must stay within VSS-0.3 V to VDD+0.3 V. |
| 3 | +IN | input | Non-inverting input of the rail-to-rail CMOS amplifier; input voltage range is 0 V to 5 V at VS = 5 V and must stay within VSS-0.3 V to VDD+0.3 V. |
| 4 | V- | power_in | Negative supply pin, which is ground in single-supply operation; the datasheet recommends a 0.1 µF bypass capacitor close to the package. |
| 5 | NC | unconnected | No connect; the datasheet marks this pin NC = NO CONNECT. |
| 6 | OUT | output | Rail-to-rail amplifier output with ±220 mA output current at VS = 5 V, indefinite short-circuit duration to GND and capacitive load drive up to 500 pF. |
| 7 | V+ | power_in | Positive supply pin for 2.7 V to 5.5 V operation with an absolute maximum supply voltage of 6 V, bypassed with 0.1 µF and 4.7 µF capacitors. |
| 8 | NC | unconnected | No connect; the datasheet marks this pin NC = NO CONNECT. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Corebai Microelectronics |
| Package | SOP-8 |
| Category | Operational Amplifier/Comparator |
| Pins | 8 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC |  | Poor PC board layout, contaminants, and the board insulator material can create leakage | 22 |

## CAD (KiCad official)

- Symbol: `CBM8655AS8`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cbm8655as8-etched.step` / `cbm8655as8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cbm8655as8.step` / `cbm8655as8.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Corebai Microelectronics datasheet](docs/cbm8655as8-datasheet.pdf) (25 pp, sha256 `29c3f6721613b5a4`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cbm8655as8-datasheet.pdf)