# THS4521ID

**Texas Instruments** · Differential Amplifiers · SOIC-8

THS4521ID 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 | VIN- | power_in | Inverting amplifier input. |
| 2 | VOCM | input | Common-mode voltage input that sets the output common-mode voltage. |
| 3 | VS+ | power_in | Amplifier positive power-supply input. |
| 4 | VOUT+ | output | Noninverting amplifier output. |
| 5 | VOUT- | output | Inverting amplifier output. |
| 6 | VS- | power_in | Amplifier negative power-supply input; VS- is tied together on multi-channel devices. |
| 7 | PD | input | Power-down pin: logic low puts the device into low-power mode, and logic high or open gives normal operation. |
| 8 | VIN+ | power_in | Noninverting amplifier input. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `THS4521ID`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ths4521id-etched.step` / `ths4521id-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ths4521id.step` / `ths4521id.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/ths4521.pdf) (71 pp, sha256 `5524d570de2f24cd`, retrieved 2026-10-07, tier: manufacturer)
- **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/ths4521id-datasheet.pdf)