ADM3485EARZ from UMW, 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	tri_state	Receiver output. When /RE is low and A-B >= 200mV, RO is high; when A-B <= -200mV, RO is low. RO is high-impedance when /RE is high.
2	/RE	input	Active-low receiver output enable. Low = receiver enabled (RO active); high = receiver output high-impedance. With /RE high AND DE low the device enters low-power shutdown.
3	DE	input	Driver output enable (active-high). High = driver outputs A/B active; low = driver outputs high-impedance. With /RE high AND DE low the device enters low-power shutdown.
4	DI	input	Driver input. When DE is high, DI low drives A low and B high; DI high drives A high and B low. Logic input thresholds: VIH >= 2V, VIL <= 0.8V.
5	GND	power_in	Ground / 0V reference for all voltages.
6	A	bidirectional	Non-inverting RS-485/RS-422 bus pin: non-inverting receiver input and non-inverting driver output. Common-mode range -7V to +12V; 15kV ESD-protected.
7	B	bidirectional	Inverting RS-485/RS-422 bus pin: inverting receiver input and inverting driver output. Common-mode range -7V to +12V; 15kV ESD-protected.
8	VCC	power_in	Positive supply, 3.0V to 3.6V nominal (3.3V typical). Absolute max 7V. Typical supply current 520-540 uA.

Key specifications

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

Ordering variants

ADM3485EARZ

CAD (KiCad official)

Symbol: ADM3485EARZ
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
`adm3485earz.step`	122 KB	You want the bare part, or you mark your own boards.
`adm3485earz-etched.step`	2.2 MB	You want the part with `ADM3485EARZ` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 553 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: UMW datasheet (18 pp, sha256 05653b2e0ae83223, 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