CN305 from ShangHai Consonance Elec, in a SOT-23-6. 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	OVIN	input	Over-voltage detection input. Normally driven by an external resistor divider from the monitored rail. Rising threshold VOVTH+ = 1.211 V (typ), falling threshold VOVTH- = 1.12 V (typ). Input leakage ±100 nA max.
2	GND	power_in	Device ground reference.
3	OV	output	Over-voltage detection output, active-low, open-drain. Pulls low when OVIN rises above VOVTH+ (1.211 V typ); releases high when OVIN falls below VOVTH- (1.12 V typ). Requires external pull-up (e.g., 1 MΩ to VCC). Rated VOL = 0.3 V at ISINK up to 6 mA (VCC=5 V).
4	VCC	power_in	Positive supply input, 1.9 V to 6 V. Typical supply current 11 µA at 3.0 V. Absolute maximum 6.5 V.
5	UV	output	Under-voltage detection output, active-low, open-drain. Pulls low when UVIN falls below VUVTH- (1.12 V typ); releases high when UVIN rises above VUVTH+ (1.211 V typ). Requires external pull-up (e.g., 1 MΩ to VCC). Rated VOL = 0.3 V at ISINK up to 6 mA (VCC=5 V).
6	UVIN	input	Under-voltage detection input. Normally driven by an external resistor divider from the monitored rail. Rising threshold VUVTH+ = 1.211 V (typ), falling threshold VUVTH- = 1.12 V (typ). Input leakage ±100 nA max.

Key specifications

Parameter	Value
Manufacturer	ShangHai Consonance Elec
Package	SOT-23-6
Category	Op-amp/Cmp
Pins	6

Ordering variants

Same part, different packaging or reel option.

CN305

CAD (KiCad official)

Symbol: CN305
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cn305.step`	97 KB	You want the bare part, or you mark your own boards.
`cn305-etched.step`	1.4 MB	You want the part with `CN305` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 327 faces against 117 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: ShangHai Consonance Elec datasheet (9 pp, sha256 774b64b8e63e90ec, 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