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ISO7740DWR
Public Unreviewedby Ray
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
markdownISO7740DWR
Texas Instruments · Digital Isolators · SOIC-16-300mil
ISO7740DWR 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 | Side-1 power supply. Operating range 2.25 V to 5.5 V. Bypass to GND1 with a 0.1 µF ceramic capacitor placed close to the pin. |
| 2 | GND1 | power_in | Side-1 ground reference for VCC1. Tied internally to pin 8. |
| 3 | INA | input | Logic input, channel A (side 1). CMOS/LVCMOS-compatible digital input; drives OUTA on side 2 across the SiO2 isolation barrier. |
| 4 | INB | input | Logic input, channel B (side 1). Drives OUTB on side 2. |
| 5 | INC | input | Logic input, channel C (side 1). Drives OUTC on side 2. |
| 6 | IND | input | Logic input, channel D (side 1). Drives OUTD on side 2. |
| 7 | NC | unconnected | No internal connection on ISO7740. Leave floating or tie to GND1 for best layout. |
| 8 | GND1 | power_in | Side-1 ground reference for VCC1. Second GND1 pin; tie to pin 2. |
| 9 | GND2 | power_in | Side-2 ground reference for VCC2. Tied internally to pin 15. |
| 10 | EN2 | input | Side-2 output enable. High or floating enables side-2 outputs (OUTA-OUTD); low forces the side-2 output pins to a high-impedance state. Internally pulled high. |
| 11 | OUTD | output | Logic output, channel D (side 2). CMOS/LVCMOS push-pull output; follows IND. Defaults high (fail-safe) on loss of VCC1 or input signal. |
| 12 | OUTC | output | Logic output, channel C (side 2). Follows INC; default-high on loss of input power. |
| 13 | OUTB | output | Logic output, channel B (side 2). Follows INB; default-high on loss of input power. |
| 14 | OUTA | output | Logic output, channel A (side 2). Follows INA; default-high on loss of input power. |
| 15 | GND2 | power_in | Side-2 ground reference for VCC2. Second GND2 pin; tie to pin 9. |
| 16 | VCC2 | power_in | Side-2 power supply. Operating range 2.25 V to 5.5 V. Bypass to GND2 with a 0.1 µF ceramic capacitor placed close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Signal Isolation Devices |
| Pins | 16 |
Ordering variants
Same part, different packaging or reel option.
ISO7740DWRISO7740DWRDBQISO7740DWRDBQR
CAD (KiCad official)
- Symbol:
ISO7740DWR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (51 pp, sha256
d6ac6b90609c88c4, retrieved 2026-08-17, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).