BH1726NUC-E2 from ROHM, in a WSON-8-EP(2x2). 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	ADDR	input	I2C bus slave address selector. Tie LOW for slave address 0101001b or HIGH for 0111001b. V_IH >= 0.7VCC, V_IL <= 0.3VCC.
2	VCC	power_in	Positive supply voltage input, 2.3 V to 3.6 V (2.5 V typ). Place a 0.1 uF bypass capacitor as close as possible to the IC.
3	GND	power_in	Ground reference (0 V) for the IC.
4	TEST	input	Factory test pin. Must be connected to GND in normal operation.
5	SCL	input	I2C bus serial clock input. Open-drain line requiring an external pull-up resistor. Supports up to 400 kHz (fast mode). V_IH >= 1.26 V, V_IL <= 0.54 V.
6	SDA	bidirectional	I2C bus serial data line. Open-drain bidirectional line requiring an external pull-up resistor. V_OL <= 0.4 V at I_OL = 3 mA.
7	INT	output	Interrupt output (active low, open-drain). Asserted when ADC result crosses the programmed TH_LOW/TH_HIGH thresholds with persistence. V_OL <= 0.4 V at I_OL = 3 mA. Requires external pull-up.
8	NC	unconnected	No internal connection. Leave floating or tie to GND.

Key specifications

Parameter	Value
Manufacturer	ROHM
Package	WSON-8-EP(2x2)
Category	Sensor
Pins	8

Ordering variants

BH1726NUC-E2

CAD (KiCad official)

Symbol: BH1726NUC-E2
Footprint: Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm
3D model: WSON-8-EP(2x2) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bh1726nuc-e2.step`	98 KB	You want the bare part, or you mark your own boards.
`bh1726nuc-e2-etched.step`	1.9 MB	You want the part with `BH1726NUC-E2` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 477 faces against 62 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: ROHM datasheet (19 pp, sha256 652d45f11a194522, 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