CN312 from ShangHai Consonance Elec, in a SOT-23-6L. 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	FTH	input	Falling-threshold (lower-threshold) sense input. Typically driven from an external resistor divider tapping the monitored battery voltage. When the FTH pin voltage falls below the internal 1.205 V bandgap reference, LBO goes high and LBO-bar goes low. Input leakage is ±30 nA max.
2	GND	power_in	Ground / negative supply return for the chip.
3	LBO	output	Active-high low-battery detect output (CMOS push-pull). During power-up t_RESET (min 25 ms) LBO is high. When RTH exceeds Vref for longer than t_D (min 25 ms) LBO goes low; when FTH falls below Vref, LBO goes high. VOL ≤ 0.3 V at ISINK = 3.2 mA (VCC = 3 V); VOH ≥ VCC−0.4 V at ISOURCE = 3 mA.
4	VCC	power_in	Positive supply input, 1.8 V to 6 V operating range (6.5 V absolute max). Typical supply current is 2.7 µA at 3 V. Bypass with 0.1 µF close to the pin; VCC must never exceed 6 V.
5	LBO_N	output	Active-low low-battery detect output, LBO-bar (CMOS push-pull), complement of pin 3 LBO. During power-up t_RESET (min 25 ms) LBO-bar is low. When RTH exceeds Vref for longer than t_D (min 25 ms) LBO-bar goes high; when FTH falls below Vref, LBO-bar goes low. Same drive spec as LBO.
6	RTH	input	Rising-threshold (upper-threshold) sense input. Typically driven from an external resistor divider tapping the monitored battery voltage. When the RTH pin voltage rises above the internal 1.205 V bandgap reference for longer than t_D (min 25 ms), LBO-bar goes high / LBO goes low. Input leakage is ±30 nA max.

Key specifications

Parameter	Value
Manufacturer	ShangHai Consonance Elec
Package	SOT-23-6L
Category	Sensor
Pins	6

Ordering variants

Same part, different packaging or reel option.

CN312

CAD (KiCad official)

Symbol: CN312
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cn312.step`	97 KB	You want the bare part, or you mark your own boards.
`cn312-etched.step`	1.2 MB	You want the part with `CN312` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 295 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 1352076e05a296cb, 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