# COS4423SR

**COSINE** · Gate Drive ICs · SOP-8

COS4423SR 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 | No internal connection on this pin. |
| 2 | IN A | input | MOSFET driver input A is a high-impedance TTL/CMOS compatible input with 300 mV of hysteresis, and output A is held LOW if this input is unbiased or floating. |
| 3 | GND | power_in | Device return ground that carries high peak current when the capacitive load is discharged and should have a low-impedance connection to the bias supply return. |
| 4 | IN B | input | MOSFET driver input B is a high-impedance TTL/CMOS compatible input with 300 mV of hysteresis, and output B is held LOW if this input is unbiased or floating. |
| 5 | OUT B | output | Channel B low-impedance CMOS push-pull output with pull-up and pull-down devices of equal strength, held LOW if the input is unbiased or floating. |
| 6 | VDD | power_in | Bias supply for the MOSFET driver, rated 4.5V to 25V with respect to GND and to be bypassed with local ceramic capacitors (1.0 µF suggested). |
| 7 | OUT A | output | Channel A low-impedance CMOS push-pull output with pull-up and pull-down devices of equal strength, held LOW if the input is unbiased or floating. |
| 8 | NC | unconnected | No internal connection on this pin. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `COS4423SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos4423sr-etched.step` / `cos4423sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos4423sr.step` / `cos4423sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](docs/cos4423sr-datasheet.pdf) (8 pp, sha256 `2487dc8d44317688`, 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/cos4423sr-datasheet.pdf)