SIT3088EESA from SIT, in a SOP-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. With /RE low, RO goes high when A−B ≥ −10mV and low when A−B ≤ −200mV. 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. Driving /RE high with DE low enters low-power shutdown mode.
3	DE	input	Driver Output Enable (active-high). Drive DE high to enable driver outputs on A/B; outputs are high-impedance when DE is low. Driving /RE high and DE low enters low-power shutdown mode.
4	DI	input	Driver Input. With DE high, DI low forces A low and B high; DI high forces A high and B low. TTL/CMOS-compatible logic input (VIH ≥ 2.0V, VIL ≤ 0.8V).
5	GND	power_in	Ground reference for the device (0V).
6	A	bidirectional	Non-inverting differential bus pin: non-inverting receiver input and non-inverting driver output. RS-485/RS-422 bus line, ±15V fault-tolerant, 15kV HBM ESD-protected.
7	B	bidirectional	Inverting differential bus pin: inverting receiver input and inverting driver output. RS-485/RS-422 bus line, ±15V fault-tolerant, 15kV HBM ESD-protected.
8	VCC	power_in	Positive supply, 3.0V to 5.5V operating range (absolute max +6.5V). Typical ICC ≈ 240-280µA active, ≈0.2µA in shutdown.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SIT3088EESA

CAD (KiCad official)

Symbol: SIT3088EESA
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sit3088eesa.step`	122 KB	You want the bare part, or you mark your own boards.
`sit3088eesa-etched.step`	2.6 MB	You want the part with `SIT3088EESA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 629 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