# COS2277SR

**COSINE** · Precision Op Amps · SOP-8

COS2277SR from COSINE, 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 | OUT1 | output | Channel 1 output, whose voltage range extends to within millivolts of each supply rail. |
| 2 | -IN1 | input | Channel 1 inverting input, with a voltage range from -Vs to +Vs. |
| 3 | +IN1 | input | Channel 1 non-inverting input, with the same voltage range as -IN (-Vs to +Vs). |
| 4 | -Vs | power_in | Negative power supply or ground; if not connected to ground, bypass it with a 0.1µF capacitor as close to the part as possible. |
| 5 | +IN2 | input | Channel 2 non-inverting input, with the same voltage range as -IN (-Vs to +Vs). |
| 6 | -IN2 | input | Channel 2 inverting input, with a voltage range from -Vs to +Vs. |
| 7 | OUT2 | output | Channel 2 output, whose voltage range extends to within millivolts of each supply rail. |
| 8 | +Vs | power_in | Positive power supply (±2.5V to ±18V supply range); place a 0.1µF bypass capacitor as close to the part as possible. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `COS2277SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos2277sr-etched.step` / `cos2277sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos2277sr.step` / `cos2277sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8776489069775859712) (9 pp, sha256 `fc7e6675fc8999be`, retrieved 2026-10-13, 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/cos2277sr-datasheet.pdf)