MAX485ED from HTC Korea TAEJIN Tech, 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. Logic-level output that reflects the polarity of the differential A-B receiver input. High when A-B >= +0.2V, low when A-B <= -0.2V. High-impedance when RE is high; fail-safe guarantees a HIGH state when inputs are left unconnected.
2	RE	input	Receiver output enable, active LOW. A logic LOW enables the receiver output RO; a logic HIGH places RO in high-impedance (tri-state). Datasheet notes this pin as RE* (active-low).
3	DE	input	Driver output enable, active HIGH. A logic HIGH enables the differential driver outputs A and B; a logic LOW places the driver in high-impedance (tri-state).
4	DI	input	Driver input. Logic-level TTL/CMOS input to the differential driver. When DE is high, DI=1 drives A high and B low; DI=0 drives A low and B high.
5	GND	power_in	Ground reference for the device.
6	A	bidirectional	Non-inverting driver output and non-inverting receiver input. Part of the RS-485/RS-422 differential pair. Common-mode range -7V to +12V; can withstand -15V to +15V; receiver input impedance typ. 15kΩ (12kΩ min).
7	B	bidirectional	Inverting driver output and inverting receiver input. Part of the RS-485/RS-422 differential pair. Common-mode range -7V to +12V; can withstand -15V to +15V; receiver input impedance typ. 15kΩ (12kΩ min).
8	VCC	power_in	Positive supply input. Operating range 4.75V to 5.25V (nominal +5V). Absolute maximum 7V. No-load supply current typ. 900µA (DE=VCC) or 600µA (DE=0V).

Key specifications

Parameter	Value
Manufacturer	HTC Korea TAEJIN Tech
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

MAX485ED
MAX485EDEN

CAD (KiCad official)

Symbol: MAX485ED
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
`max485ed.step`	122 KB	You want the bare part, or you mark your own boards.
`max485ed-etched.step`	1.6 MB	You want the part with `MAX485ED` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 420 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: HTC Korea TAEJIN Tech datasheet (10 pp, sha256 774f69f5ba13229b, 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