TPT485E-SO1R from 3PEAK, 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. Digital CMOS output carrying the recovered data from the differential bus (A-B). Logic high when VID > VIT+ (typ -15 mV); high-Z when receiver is disabled (/RE = high or open). VOH ≥ 4.0V @ IOH = -8 mA; VOL ≤ 0.4V @ IOL = 8 mA.
2	/RE	input	Receiver Output Enable, active low. Drive low to enable the receiver output RO; drive high (or leave open) to place RO in high-Z. VIH = 2V min, VIL = 0.8V max. Tie to GND for permanent receive mode.
3	DE	input	Driver Output Enable, active high. Drive high to enable the differential driver onto A/B; drive low (or leave open) to place A/B in high-Z (driver disabled). VIH = 2V min, VIL = 0.8V max.
4	DI	input	Driver Input. Digital CMOS input that drives the RS-485 differential bus when DE is asserted. DI=H drives A high / B low; DI=L drives A low / B high. If DI is left open with DE high, the driver defaults to the 'bus high' state (A high, B low). VIH = 2V min, VIL = 0.8V max.
5	GND	power_in	Ground reference for the device. Connect to system ground.
6	A	bidirectional	Noninverting RS-485 bus pin: driver noninverting output and receiver noninverting input. Withstands -15V to +15V continuous and ±100V transient (through 100Ω), ±18kV HBM and ±12kV IEC61000-4-2 contact discharge. Bus input impedance ≥ 96 kΩ (1/8 unit load). Common-mode range -7V to +12V.
7	B	bidirectional	Inverting RS-485 bus pin: driver inverting output and receiver inverting input. Same protection and impedance ratings as A. Together with A forms the differential RS-485 pair (VID = VA - VB).
8	VCC	power_in	Supply voltage input, 4.5V to 5.5V (absolute max 7V). Decouple to GND with a 0.1 µF ceramic capacitor near the pin. Typical quiescent supply current is 650 µA with both driver and receiver enabled; <1 µA in shutdown (DE=GND, /RE=DI=VCC).

Key specifications

Parameter	Value
Manufacturer	3PEAK
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

TPT485E-SO1R

CAD (KiCad official)

Symbol: TPT485E-SO1R
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
`tpt485e-so1r.step`	122 KB	You want the bare part, or you mark your own boards.
`tpt485e-so1r-etched.step`	2.2 MB	You want the part with `TPT485E-SO1R` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 561 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: 3PEAK datasheet (8 pp, sha256 43d4afd779e259fc, 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