# UCC21220DR

**Texas Instruments** · Isolators - Gate Drivers · SOIC-16

UCC21220DR from Texas Instruments, in a SOIC-16. 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 | INA | input | TTL/CMOS compatible input signal for A channel driver; pulled low internally if left open. |
| 2 | INB | input | TTL/CMOS compatible input signal for B channel driver; pulled low internally if left open. |
| 3 | VCCI | power_in | Primary-side supply voltage; requires local low ESR/ESL capacitor decoupling to GND. |
| 4 | GND | power_in | Primary-side ground reference for all primary-side signals. |
| 5 | DIS | input | Disable pin for both driver outputs; asserted high disables, low enables; pulled high internally if left open. |
| 6 | NC | unconnected | No internal connection. |
| 7 | NC | unconnected | No internal connection. |
| 8 | VCCI | power_in | Primary-side supply voltage internally shorted to pin 3; requires low ESR/ESL capacitor decoupling to GND. |
| 9 | VSSB | power_in | Ground for secondary-side driver B; ground reference for secondary side B channel. |
| 10 | OUTB | output | Output of driver B; connect to gate of B channel FET or IGBT. |
| 11 | VDDB | power_in | Secondary-side power for driver B; requires local low ESR/ESL capacitor decoupling to VSSB. |
| 12 | NC | unconnected | No internal connection. |
| 13 | NC | unconnected | No internal connection. |
| 14 | VSSA | power_in | Ground for secondary-side driver A; ground reference for secondary side A channel. |
| 15 | OUTA | output | Output of driver A; connect to gate of A channel FET or IGBT. |
| 16 | VDDA | power_in | Secondary-side power for driver A; requires local low ESR/ESL capacitor decoupling to VSSA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `UCC21220DR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `ucc21220dr-etched.step` / `ucc21220dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ucc21220dr.step` / `ucc21220dr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/ucc21220.pdf) (45 pp, sha256 `71440c65170dc667`, retrieved 2026-10-07, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/ucc21220dr-datasheet.pdf)