component
ISO7731FDWR
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
markdownISO7731FDWR
Texas Instruments · Digital Isolators · SOIC-16-300mil
ISO7731FDWR 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 | Power supply input, 2.25V to 5.5V operating range, bypass with 0.1μF capacitor to GND1 |
| 2 | GND1 | power_in | Input-side ground reference for VCC1 bypass capacitor and input circuitry |
| 3 | INA | input | Channel A input, CMOS logic with VIH ≥ 0.7×VCCI and VIL ≤ 0.3×VCCI, non-inverted data path to OUTA with 11ns typical propagation delay at 5V |
| 4 | INB | input | Channel B input, CMOS logic with VIH ≥ 0.7×VCCI and VIL ≤ 0.3×VCCI, non-inverted data path to OUTB with 11ns typical propagation delay at 5V |
| 5 | OUTC | tri_state | Channel C tri-state output (inverted logic), VOH ≥ VCCO - 0.4V and VOL ≤ 0.4V at 5V, high-impedance when EN1 low, defaults low when powered off (F-suffix variant) |
| 6 | NC | unconnected | Not connected pin |
| 7 | EN1 | input | Output enable 1, high or open-circuit state enables side 1 outputs, low state forces outputs to high-impedance and reduces quiescent current |
| 8 | GND1 | power_in | Input-side ground reference for VCC1 bypass capacitor and input circuitry |
| 9 | GND2 | power_in | Output-side ground reference for VCC2 bypass capacitor and output circuitry, isolated from GND1 by ≥5000VRMS in DW package |
| 10 | EN2 | input | Output enable 2, high or open-circuit state enables side 2 outputs, low state forces outputs to high-impedance and reduces quiescent current |
| 11 | NC | unconnected | Not connected pin |
| 12 | INC | input | Channel C input (inverted logic path), CMOS logic with VIH ≥ 0.7×VCCI and VIL ≤ 0.3×VCCI, inverted output to OUTC with 11ns typical propagation delay at 5V |
| 13 | OUTB | tri_state | Channel B tri-state output (non-inverted logic), VOH ≥ VCCO - 0.4V and VOL ≤ 0.4V at 5V, high-impedance when EN2 low, defaults low when powered off (F-suffix variant) |
| 14 | OUTA | tri_state | Channel A tri-state output (non-inverted logic), VOH ≥ VCCO - 0.4V and VOL ≤ 0.4V at 5V, high-impedance when EN2 low, defaults low when powered off (F-suffix variant) |
| 15 | GND2 | power_in | Output-side ground reference for VCC2 bypass capacitor and output circuitry, isolated from GND1 by ≥5000VRMS in DW package |
| 16 | VCC2 | power_in | Power supply input, 2.25V to 5.5V operating range, bypass with 0.1μF capacitor to GND2, galvanically isolated from VCC1 by ≥5000VRMS |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Signal Isolation Devices |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
ISO7731FDWR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
iso7731fdwr-etched.step/iso7731fdwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);iso7731fdwr.step/iso7731fdwr.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).