# COS3122SR

**COSINE** · Gate Drivers · SOP-8

COS3122SR 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 | VDD | power_in | Bias supply for the MOSFET driver, rated 4.5V to 18V with respect to the GND pin, and should be bypassed with local ceramic capacitors (1.0 µF suggested). |
| 2 | INPUT | input | TTL/CMOS compatible control input with 300 mV of hysteresis, and the output is held LOW if this input is unbiased or floating. |
| 3 | EN | input | TTL/CMOS compatible enable input that must be pulled LOW to inhibit the driver, forcing the output low regardless of the input state; it is internally pulled up to VDD through 100 kΩ for active-high operation. |
| 4 | GND | power_in | Device return ground that should have a low-impedance connection to the bias supply return, since high peak current flows out of this pin when the capacitive load discharges. |
| 5 | GND | power_in | Device return ground that should have a low-impedance connection to the bias supply return, since high peak current flows out of this pin when the capacitive load discharges. |
| 6 | OUTPUT | output | CMOS push-pull driver output with equal pull-up and pull-down strength, held LOW if the input is unbiased or floating; peak output current is 9 A. |
| 7 | OUTPUT | output | CMOS push-pull driver output with equal pull-up and pull-down strength, held LOW if the input is unbiased or floating; peak output current is 9 A. |
| 8 | VDD | power_in | Bias supply for the MOSFET driver, rated 4.5V to 18V with respect to the GND pin, and should be bypassed with local ceramic capacitors (1.0 µF suggested). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-8 |
| Category | Motor Driver ICs |
| 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 (Operating Voltage Range) | VDD | 4.5 |  | 18 | V |  | 5 |
| DC Supply Voltage (Recommended Operating Conditions) | VDD | 4.5 |  | 18 | V |  | 4 |
| DC supply voltage (Absolute Maximum) | VDD |  |  | 25 | V |  | 4 |
| Operating junction temperature |  | -40 |  | 125 | °C |  | 4 |
| Storage temperature |  | -55 |  | 150 | °C |  | 4 |
| Operating ambient temperature |  | -40 |  | 125 | °C |  | 4 |
| Input Signal High Threshold | VIH | 1.6 |  |  | V |  | 5 |
| Input Signal Low Threshold | VIL |  |  | 0.7 | V |  | 5 |
| Low Output Voltage | VOL |  |  | 0.025 | V | DC Test | 5 |
| Non-inverting Input Current (Input Signal High Current) | IIH |  | 88 | 125 | µA | VINX=18V | 5 |
| Inverting Input Current (Input Signal Low Current) | IIL |  | 88 | 125 | µA | VINX=0V | 5 |
| Under-Voltage Lockout ON Threshold |  | 3.7 |  | 4.1 | V |  | 5 |
| Input Signal Hysteresis | VHYS |  | 0.3 |  | V |  | 5 |
| Inverting Input Current (Input Signal High Current) | IIH |  | 0.01 |  | µA | Inverting Input Current, VINX=18V | 5 |
| Non-inverting Input Current (Input Signal Low Current) | IIL |  | 0.01 |  | µA | Non-inverting Input Current, VINX=0V | 5 |
| Pull-Up Resistance | ROH |  | 0.83 |  | Ω | Source Current = 10mA | 5 |
| Pull-Down Resistance | ROL |  | 0.5 |  | Ω | Sink Current = -10mA | 5 |
| Peak Output Current | IPK |  | 9 |  | A | 10V≤ VDD ≤18V | 5 |
| Power Supply Current | ICC |  | 0.85 |  | mA | VIN=3V | 5 |
| Power Supply Current | ICC |  | 0.65 |  | mA | VIN=0V | 5 |
| Under-Voltage Lockout Hysteresis |  |  | 0.5 |  | V |  | 5 |
| Rise Time | tR |  | 35 |  | ns | CL =10,000 pF | 6 |
| Fall Time | tF |  | 36 |  | ns | CL =10,000 pF | 6 |
| Turn-On Delay Time (COS3122) | tD1 |  | 60 |  | ns | COS3122, CL =10,000 pF | 6 |
| Turn-Off Delay Time (COS3122) | tD2 |  | 63 |  | ns | COS3122, CL =10,000 pF | 6 |
| Thermal Shutdown Threshold |  |  | 150 |  | °C |  | 6 |
| Thermal Shutdown Threshold Hysteresis |  |  | 25 |  | °C |  | 6 |
| Package Thermal Resistance, junction-to-ambient (SOP8) | RθJA |  | 155 |  | °C/W | SOP8 package | 4 |

## CAD (KiCad official)

- Symbol: `COS3122SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos3122sr-etched.step` / `cos3122sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos3122sr.step` / `cos3122sr.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/8603374075150950400) (8 pp, sha256 `128b6dd1d63b734a`, retrieved 2026-10-19, 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/cos3122sr-datasheet.pdf)