# ISO1541QDRQ1

**Texas Instruments** · I2C Isolators · SOIC-8

ISO1541QDRQ1 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 | VCC1 | power_in | Side 1 supply voltage; recommended operating range is 3 V to 5.5 V (section 6.3). |
| 2 | SDA1 | bidirectional | Side 1 serial data input/output; side 1 high-level input is 0.7 × VCC1 minimum, and the side 1 output sink current is 0.5 mA to 3.5 mA with up to 40 pF load. |
| 3 | SCL1 | input | Side 1 serial clock input only on ISO1541-Q1; side 1 low-level input is 0.5 V maximum and high-level input is 0.7 × VCC1 minimum. |
| 4 | GND1 | power_in | Ground for side 1; all side 1 voltages are referenced to this pin. |
| 5 | GND2 | power_in | Ground for side 2; all side 2 voltages are referenced to this pin. |
| 6 | SCL2 | output | Side 2 serial clock output on ISO1541-Q1; open-drain output with sink current of 0.5 mA to 35 mA and bus capacitance up to 400 pF. |
| 7 | SDA2 | bidirectional | Side 2 serial data input/output; side 2 high-level input is 0.7 × VCC2 minimum, and the side 2 output sink current is 0.5 mA to 35 mA with up to 400 pF load. |
| 8 | VCC2 | power_in | Side 2 supply voltage; recommended operating range is 3 V to 5.5 V (section 6.3). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Signal Isolation Devices |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `ISO1541QDRQ1`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `iso1541qdrq1-etched.step` / `iso1541qdrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `iso1541qdrq1.step` / `iso1541qdrq1.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/iso1541-q1) (35 pp, sha256 `85166d2cd711568c`, retrieved 2026-10-10, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/iso1541qdrq1-datasheet.pdf)