# ISO7420MDR

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

ISO7420MDR 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 | Input-side supply for VCC1, specified at 3.15 V to 3.45 V for 3.3-V operation or 4.75 V to 5.25 V for 5-V operation, with absolute maximum -0.5 V to 6 V. |
| 2 | INA | input | Channel A logic input with TTL thresholds (VIH minimum 2 V, VIL maximum 0.8 V); inputs are 5-V tolerant when supplied from a 3.3-V supply. |
| 3 | INB | input | Channel B logic input with TTL thresholds (VIH minimum 2 V, VIL maximum 0.8 V); inputs are 5-V tolerant when supplied from a 3.3-V supply. |
| 4 | GND1 | power_in | Ground connection for VCC1 (input-side ground). |
| 5 | GND2 | power_in | Ground connection for VCC2 (output-side ground). |
| 6 | OUTB | output | Channel B logic output; recommended output current limits are IOH -4 mA and IOL 4 mA. |
| 7 | OUTA | output | Channel A logic output; recommended output current limits are IOH -4 mA and IOL 4 mA. |
| 8 | VCC2 | power_in | Output-side supply for VCC2, specified at 3.15 V to 3.45 V for 3.3-V operation or 4.75 V to 5.25 V for 5-V operation, with absolute maximum -0.5 V to 6 V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `ISO7420MDR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `iso7420mdr-etched.step` / `iso7420mdr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `iso7420mdr.step` / `iso7420mdr.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/iso7420m.pdf) (30 pp, sha256 `134345938abaca3b`, retrieved 2026-10-11, 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/iso7420mdr-datasheet.pdf)