# OPA2743UA

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

OPA2743UA 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 | OUT A | output | Output of amplifier A, which delivers ±20mA when |VS - VOUT| is below 1V and has a ±30mA short-circuit current limit (short-circuit to ground is continuous, one amplifier per package). |
| 2 | -In A | input | Inverting input of amplifier A, with a common-mode range of (V-) - 0.1V to (V+) + 0.1V and an input current limited to 10mA when the signal swings more than 0.3V beyond the supply rails. |
| 3 | +IN A | input | Non-inverting input of amplifier A, with a common-mode range of (V-) - 0.1V to (V+) + 0.1V and an input current limited to 10mA when the signal swings more than 0.3V beyond the supply rails. |
| 4 | V- | power_in | Negative power supply; the device operates from 3.5V to 12V single supply (V- at 0V) or ±1.75V to ±6V dual supply, with V+ to V- absolute maximum of 13.2V. |
| 5 | +IN B | input | Non-inverting input of amplifier B, with a common-mode range of (V-) - 0.1V to (V+) + 0.1V and an input current limited to 10mA when the signal swings more than 0.3V beyond the supply rails. |
| 6 | -In B | input | Inverting input of amplifier B, with a common-mode range of (V-) - 0.1V to (V+) + 0.1V and an input current limited to 10mA when the signal swings more than 0.3V beyond the supply rails. |
| 7 | OUT B | output | Output of amplifier B, which delivers ±20mA when |VS - VOUT| is below 1V and has a ±30mA short-circuit current limit (short-circuit to ground is continuous, one amplifier per package). |
| 8 | V+ | power_in | Positive power supply; the device is specified from 3.5V to 12V single supply, with V+ to V- absolute maximum of 13.2V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `OPA2743UA`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `opa2743ua-etched.step` / `opa2743ua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa2743ua.step` / `opa2743ua.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/opa743) (18 pp, sha256 `44b87cfd1a1b26a1`, 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/opa2743ua-datasheet.pdf)