CC6903SO-20A from Cross chip, 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	IP+	passive	Primary current sense positive terminal. Internally tied to pin 2; both pins carry the sensed current into the integrated primary conductor (Rp ≈ 1.5 mΩ). Galvanically isolated (100 VAC) from the signal-side pins.
2	IP+	passive	Primary current sense positive terminal (paralleled with pin 1). Together pins 1-2 form the positive side of the integrated primary conductor.
3	IP-	passive	Primary current sense negative terminal. Internally tied to pin 4; both pins form the return side of the integrated primary conductor. Galvanically isolated (100 VAC) from the signal-side pins.
4	IP-	passive	Primary current sense negative terminal (paralleled with pin 3). Together pins 3-4 form the negative side of the integrated primary conductor.
5	GND	power_in	Signal ground. Ground reference for the internal analog circuitry and OUT pin.
6	NC	unconnected	No connect. Must be left floating (需悬空) per the pin description table.
7	OUT	output	Analog signal output. Ratiometric to VCC with a quiescent level of VCC/2 (typ 1.65 V at 3.3 V VCC). For the -20A variant, VOUT = VCC/2 + 0.066 × IP(A). Source capability 400 µA, sink capability 30 mA; guaranteed linear range 0.33-2.97 V.
8	VCC	power_in	Supply voltage input. Recommended operating range 3.0-3.6 V (absolute max 7 V). Typical ICC ≈ 5 mA. Bypass with 0.1 µF to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	Cross chip
Package	SOP-8
Category	Sensor
Pins	8

Ordering variants

Same part, different packaging or reel option.

CC6903SO-10A
CC6903SO-20A
CC6903SO-30A

CAD (KiCad official)

Symbol: CC6903SO-20A
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
`cc6903so-20a.step`	122 KB	You want the bare part, or you mark your own boards.
`cc6903so-20a-etched.step`	2.9 MB	You want the part with `CC6903SO-20A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 665 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: Cross chip datasheet (12 pp, sha256 4caefefced8b515b, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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