ISO7720FDR from Texas Instruments, in a SOIC-8. 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	Input-side power supply, 2.25 V to 5.5 V. Bypass with a low-ESR ceramic capacitor to GND1 close to the pin.
2	INA	input	Digital input for channel A. LVCMOS/CMOS-compatible; VIH = 0.7 x VCC1, VIL = 0.3 x VCC1. Default output HIGH if input floats or supply is lost.
3	INB	input	Digital input for channel B. LVCMOS/CMOS-compatible; VIH = 0.7 x VCC1, VIL = 0.3 x VCC1. Default output HIGH if input floats or supply is lost.
4	GND1	power_in	Ground reference for VCC1 (input side).
5	GND2	power_in	Ground reference for VCC2 (output side).
6	OUTB	output	Digital output for channel B, referenced to VCC2/GND2. IOH = -4 mA (5 V), -2 mA (3.3 V), -1 mA (2.5 V); IOL = 4 mA (5 V), 2 mA (3.3 V), 1 mA (2.5 V).
7	OUTA	output	Digital output for channel A, referenced to VCC2/GND2. IOH = -4 mA (5 V), -2 mA (3.3 V), -1 mA (2.5 V); IOL = 4 mA (5 V), 2 mA (3.3 V), 1 mA (2.5 V).
8	VCC2	power_in	Output-side power supply, 2.25 V to 5.5 V. Bypass with a low-ESR ceramic capacitor to GND2 close to the pin.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Comm/UART
Pins	8

Ordering variants

Same part, different packaging or reel option.

ISO7720FDR
ISO7720DWV
ISO7720FDWV
ISO7720DW
ISO7720FDW

CAD (KiCad official)

Symbol: ISO7720FDR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`iso7720fdr.step`	122 KB	You want the bare part, or you mark your own boards.
`iso7720fdr-etched.step`	2.0 MB	You want the part with `ISO7720FDR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 492 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (38 pp, sha256 6cd4876010fb4841, 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).

Datasheet PDF