ISO3088DWR 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	Logic-side supply. 3.15-3.6 V for 3.3 V operation, or 4.5-5.5 V for 5 V operation. Referenced to GND1.
2	GND1	power_in	Logic-side ground reference for Vcc1. Isolated from GND2 by the galvanic isolation barrier.
3	R	output	Receiver output (logic side). Driven high/low from the differential bus A-B; high-impedance when RE is high. 3.3 V/5 V CMOS levels.
4	RE	input	Receiver enable, active LOW. Drive low to enable receiver output R; drive high to place R in high-impedance state. Logic-side CMOS input.
5	DE	input	Driver enable, active HIGH. Drive high to enable the differential bus driver; drive low to place A/B outputs in high-impedance state. Logic-side CMOS input.
6	D	input	Driver data input (logic side). Logic level here is transmitted to the differential bus A/B when DE is asserted. 3.3 V/5 V CMOS input, 5 V tolerant.
7	GND1	power_in	Logic-side ground. Tie together with pins 2 and 8 to the logic-side ground plane.
8	GND1	power_in	Logic-side ground. Tie together with pins 2 and 7 to the logic-side ground plane.
9	GND2	power_in	Bus-side ground. Tie together with pins 10 and 15 to the isolated bus-side ground plane.
10	GND2	power_in	Bus-side ground. Tie to bus-side ground plane along with pins 9 and 15.
11	NC	unconnected	No internal connection. Leave floating or tie to GND2.
12	A	bidirectional	Non-inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input at all times. Withstands -7 V to +12 V bus common mode; 12 kV HBM ESD to GND2.
13	B	bidirectional	Inverting differential bus I/O (RS-485/RS-422). Driver output when DE is high; receiver input at all times. Withstands -7 V to +12 V bus common mode; 12 kV HBM ESD to GND2.
14	NC	unconnected	No internal connection. Leave floating or tie to GND2.
15	GND2	power_in	Bus-side ground. Tie together with pins 9 and 10 to the isolated bus-side ground plane.
16	Vcc2	power_in	Bus-side supply, 4.5-5.5 V. Powers the isolated RS-485 line driver/receiver. Referenced to GND2.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16-300mil
Category	Interface
Pins	16

Ordering variants

Same part, different packaging or reel option.

ISO3088DWR

CAD (KiCad official)

Symbol: ISO3088DWR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16-300mil (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`iso3088dwr.step`	217 KB	You want the bare part, or you mark your own boards.
`iso3088dwr-etched.step`	3.0 MB	You want the part with `ISO3088DWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 722 faces against 267 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 (20 pp, sha256 8979fe1c0e6ee2ce, retrieved 2026-08-17, tier: manufacturer)
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