component
ISO7731DWR
Public Made by Adomby adom
Texas Instruments Digital Isolators, SOIC-16-300mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownISO7731DWR
Texas Instruments · Digital Isolators · SOIC-16-300mil
ISO7731DWR from Texas Instruments, in a SOIC-16-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC1 | power_in | Supply voltage input for side 1, rated 2.25V to 5.5V; requires 0.1µF bypass capacitor to GND1. |
| 2 | GND1 | power_in | Ground reference for VCC1 and input-side logic; keep within 2mm of VCC1 bypass capacitor. |
| 3 | INA | input | Logic input channel A, accepts 0V to VCCI with threshold at 0.3×VCCI to 0.7×VCCI; internally pulled. |
| 4 | INB | input | Logic input channel B, accepts 0V to VCCI with threshold at 0.3×VCCI to 0.7×VCCI; internally pulled. |
| 5 | OUTC | output | Logic output channel C (inverted relative to INC); can source/sink ±15mA at 0V to VCCO with VOH min 0.4V below VCCO. |
| 6 | NC | unconnected | Not connected internally; leave open or tie to ground on PCB design. |
| 7 | EN1 | input | Output enable for side 1; high or open enables OUTA output, low drives to high-impedance state. |
| 8 | GND1 | power_in | Ground reference for VCC1 and input-side logic; keep within 2mm of VCC1 bypass capacitor. |
| 9 | GND2 | power_in | Ground reference for VCC2 and output-side logic; keep within 2mm of VCC2 bypass capacitor. |
| 10 | EN2 | input | Output enable for side 2; high or open enables OUTB and OUTC outputs, low drives to high-impedance state. |
| 11 | NC | unconnected | Not connected internally; leave open or tie to ground on PCB design. |
| 12 | INC | input | Logic input channel C, accepts 0V to VCCI with threshold at 0.3×VCCI to 0.7×VCCI; internally pulled. |
| 13 | OUTB | output | Logic output channel B (non-inverted relative to INB); can source/sink ±15mA at 0V to VCCO with VOH min 0.4V below VCCO. |
| 14 | OUTA | output | Logic output channel A (non-inverted relative to INA); can source/sink ±15mA at 0V to VCCO with VOH min 0.4V below VCCO. |
| 15 | GND2 | power_in | Ground reference for VCC2 and output-side logic; keep within 2mm of VCC2 bypass capacitor. |
| 16 | VCC2 | power_in | Supply voltage input for side 2, rated 2.25V to 5.5V; requires 0.1µF bypass capacitor to GND2. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Signal Isolation Devices |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
ISO7731DWR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
iso7731dwr-etched.step/iso7731dwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);iso7731dwr.step/iso7731dwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (49 pp, sha256
6d47a7b1277198b2, retrieved 2026-09-22, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).