# COS4425SR

**COSINE** · Gate Drive ICs · SOP-8

COS4425SR 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 | NC | unconnected | Pin 1 is a no-connection pin on the SOP-8 package, as stated in the pin description table. |
| 2 | IN A | input | Input A is a high-impedance TTL/CMOS compatible input with 300mV of hysteresis that prevents output glitching on slow input edges. |
| 3 | GND | power_in | Ground is the device return pin and should have a low-impedance connection to the bias supply return, since high peak current flows out of it when the load discharges. |
| 4 | In B | input | Input B is a high-impedance TTL/CMOS compatible input with 300mV of hysteresis that prevents output glitching on slow input edges. |
| 5 | OUT B | output | Output B is a low-impedance CMOS push-pull output that is held LOW when its input is unbiased or floating. |
| 6 | VDD | power_in | VDD is the bias supply for the driver and is rated for 4.5V to 25V with respect to the Ground pin, with local ceramic bypass of 1.0μF suggested. |
| 7 | OUT A | output | Output A is a low-impedance CMOS push-pull output that is held LOW when its input is unbiased or floating. |
| 8 | NC | unconnected | Pin 8 is a no-connection pin on the SOP-8 package, as stated in the pin description table. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-8 |
| Category | Power Supply Chip |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `COS4425SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos4425sr-etched.step` / `cos4425sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos4425sr.step` / `cos4425sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](docs/cos4425sr-datasheet.pdf) (8 pp, sha256 `eae8fe8c9cd4ca52`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/cos4425sr-datasheet.pdf)