# THS4221D

**Texas Instruments** · Operational Amplifier · SOIC-8

THS4221D from Texas Instruments, in a SOIC-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; leave unconnected. |
| 2 | IN− | input | Inverting input of the amplifier; the input common-mode voltage range is VS− + 1.1 V to VS+ − 1.1 V. |
| 3 | IN+ | input | Non-inverting input of the amplifier; the input common-mode voltage range is VS− + 1.1 V to VS+ − 1.1 V. |
| 4 | VS− | power_in | Negative power supply; supply is 2.7 V to 15 V single-supply or ±1.35 V to ±7.5 V dual-supply, with absolute maximum supply voltage of 16.5 V. |
| 5 | NC | unconnected | No internal connection; leave unconnected. |
| 6 | VOUT | output | Amplifier output; output current is rated at 100 mA (absolute maximum), with rail-to-rail swing of ±4.8 V at RL = 2 kΩ. |
| 7 | VS+ | power_in | Positive power supply; supply is 2.7 V to 15 V single-supply or ±1.35 V to ±7.5 V dual-supply, with absolute maximum supply voltage of 16.5 V. |
| 8 | NC | unconnected | No internal connection; leave unconnected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `THS4221D`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ths4221d-etched.step` / `ths4221d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ths4221d.step` / `ths4221d.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/cn/lit/gpn/ths4221) (49 pp, sha256 `f50c774974bf2804`, retrieved 2026-10-08, 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/ths4221d-datasheet.pdf)