CD4040BM from HGSEMI, in a SOP-16. 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	Q12	output	Buffered counter output, stage 12 (divide-by-4096). CMOS output, VDD swing.
2	Q6	output	Buffered counter output, stage 6 (divide-by-64). CMOS output.
3	Q5	output	Buffered counter output, stage 5 (divide-by-32). CMOS output.
4	Q7	output	Buffered counter output, stage 7 (divide-by-128). CMOS output.
5	Q4	output	Buffered counter output, stage 4 (divide-by-16). CMOS output.
6	Q3	output	Buffered counter output, stage 3 (divide-by-8). CMOS output.
7	Q2	output	Buffered counter output, stage 2 (divide-by-4). CMOS output.
8	VSS	power_in	Negative supply / ground reference (0 V).
9	Q1	output	Buffered counter output, stage 1 (divide-by-2). CMOS output.
10	CLK	input	Clock input. Counter advances on the high-to-low (negative-going) transition of CLK. Schmitt-trigger CMOS input.
11	RST	input	Master reset. A high level asynchronously clears all 12 counter stages to zero; must be held low for normal counting.
12	Q9	output	Buffered counter output, stage 9 (divide-by-512). CMOS output.
13	Q8	output	Buffered counter output, stage 8 (divide-by-256). CMOS output.
14	Q10	output	Buffered counter output, stage 10 (divide-by-1024). CMOS output.
15	Q11	output	Buffered counter output, stage 11 (divide-by-2048). CMOS output.
16	VDD	power_in	Positive supply voltage. Operating range 3 V to 18 V (CD4000B series).

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-16
Category	Logic
Pins	16

Ordering variants

Same part, different packaging or reel option.

CD4040BMM
CD4040BMSMD
CD4040BME
CD4040BMN
CD4040BMPW

CAD (KiCad official)

Symbol: CD4040BM
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cd4040bm.step`	217 KB	You want the bare part, or you mark your own boards.
`cd4040bm-etched.step`	2.2 MB	You want the part with `CD4040BM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 564 faces against 267 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: HGSEMI datasheet (8 pp, sha256 44c6cde876d70aeb, 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