# COS4427DT

**COSINE** · Gate Drive ICs · DIP-8

COS4427DT from COSINE, in a DIP-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 connection; this pin is not internally connected on the COS4427. |
| 2 | IN A | input | MOSFET driver input A is high-impedance and TTL/CMOS compatible, with 300 mV of hysteresis between its high and low thresholds to prevent output glitching on slow edges. |
| 3 | GND | power_in | Ground is the device return pin and must have a low-impedance connection to the bias supply return, since high peak current flows out of it when the capacitive load discharges. |
| 4 | In B | input | MOSFET driver input B is high-impedance and TTL/CMOS compatible, with 300 mV of hysteresis between its high and low thresholds to prevent output glitching on slow edges. |
| 5 | OUT B | output | Channel B output is a low-impedance CMOS push-pull output whose pull-down and pull-up devices have equal strength, giving equal rise and fall times. |
| 6 | VDD | power_in | Bias supply for the MOSFET driver, rated 4.5V to 24V with respect to the GND pin, and should be bypassed with local ceramic capacitors (1.0 µF suggested). |
| 7 | OUT A | output | Channel A output is a low-impedance CMOS push-pull output whose pull-down and pull-up devices have equal strength, giving equal rise and fall times. |
| 8 | NC | unconnected | No connection; this pin is not internally connected on the COS4427. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| DC supply voltage | Vs |  |  | 28 | V |  | 3 |
| Operating junction temperature |  | -40 |  | 125 | °C |  | 3 |
| Storage temperature |  | -55 |  | 150 | °C |  | 3 |
| Combined peak output current |  |  |  | 4 | A |  | 3 |
| DC Supply Voltage |  | 4.5 |  | 24 | V |  | 3 |
| Operating ambient temperature |  | -40 |  | 85 | °C |  | 3 |
| Operating Voltage Range | VDD | 4.5 |  | 24 | V |  | 4 |
| Continuous Output Current | IDC | -200 |  | 200 | mA | Source / Sink Current | 4 |
| Package Thermal Resistance (DIP8) |  |  | 125 |  | °C/W | DIP8 package | 3 |

## CAD (KiCad official)

- Symbol: `COS4427DT`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `cos4427dt-etched.step` / `cos4427dt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos4427dt.step` / `cos4427dt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](docs/cos4427dt-datasheet.pdf) (7 pp, sha256 `91b81559744510ad`, retrieved 2026-10-30, 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/cos4427dt-datasheet.pdf)