SIT3088EEUA from SIT, in a MSOP-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	RO	output	Receiver Output. When /RE is low and (A - B) >= -10 mV, RO is high; when (A - B) <= -200 mV, RO is low. High-impedance when /RE is high.
2	/RE	input	Receiver Output Enable (active low). Drive /RE low to enable RO; RO is high-impedance when /RE is high. Drive /RE high and DE low to enter low-power shutdown mode.
3	DE	input	Driver Output Enable (active high). Drive DE high to enable driver outputs A and B; outputs are high-impedance when DE is low. Drive /RE high and DE low to enter low-power shutdown mode.
4	DI	input	Driver Input. With DE high, a low on DI forces A low and B high; a high on DI forces A high and B low.
5	GND	power_in	Ground reference for the device. All voltages are referenced to this pin.
6	A	bidirectional	Non-inverting receiver input and non-inverting driver output (RS-485/RS-422 bus line A). Withstands -15V to +15V bus fault, 15kV HBM ESD protected.
7	B	bidirectional	Inverting receiver input and inverting driver output (RS-485/RS-422 bus line B). Withstands -15V to +15V bus fault, 15kV HBM ESD protected.
8	VCC	power_in	Positive supply, 3.0 V to 5.5 V operating range (6.5 V absolute max). Bypass locally to GND with a 0.1 µF ceramic capacitor.

Key specifications

Parameter	Value
Manufacturer	SIT
Package	MSOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

SIT3088EEUA
SIT3088EEUAEESA
SIT3088EEUAEEPA
SIT3088EEUAETK

CAD (KiCad official)

Symbol: SIT3088EEUA
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sit3088eeua.step`	123 KB	You want the bare part, or you mark your own boards.
`sit3088eeua-etched.step`	2.6 MB	You want the part with `SIT3088EEUA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 617 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: SIT datasheet (19 pp, sha256 7b3ff7bae541908c, retrieved 2026-08-17, tier: lcsc)
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