CD4040BM

@@ -0,0 +1,59 @@+# CD4040BM++**HGSEMI** · Counters / Dividers · SOP-16++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++- `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)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [HGSEMI datasheet](docs/cd4040bm-datasheet.pdf) (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](docs/cd4040bm-datasheet.pdf)

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