# CD4051BM-JSM

**JSMSEMI** · Analog Switches, Multiplexers · SOP-16

CD4051BM-JSM from JSMSEMI, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 4 | bidirectional | Analog channel 4 input/output of the 8-channel switch. |
| 2 | 6 | bidirectional | Analog channel 6 input/output of the 8-channel switch. |
| 3 | COM OUT/IN | bidirectional | Common analog output/input shared by all eight channels. |
| 4 | 7 | bidirectional | Analog channel 7 input/output of the 8-channel switch. |
| 5 | 5 | bidirectional | Analog channel 5 input/output of the 8-channel switch. |
| 6 | INH | input | Inhibit control input; a logic 1 turns all channels off. |
| 7 | VEE | power_in | Negative analog supply, which sets the lower limit of the analog signal range (e.g. -5V with VDD=5V). |
| 8 | VSS | power_in | Ground / digital logic reference supply. |
| 9 | C | input | Binary channel-address select input C (with A and B selects one of eight channels). |
| 10 | B | input | Binary channel-address select input B. |
| 11 | A | input | Binary channel-address select input A. |
| 12 | 3 | bidirectional | Analog channel 3 input/output of the 8-channel switch. |
| 13 | 0 | bidirectional | Analog channel 0 input/output of the 8-channel switch. |
| 14 | 1 | bidirectional | Analog channel 1 input/output of the 8-channel switch. |
| 15 | 2 | bidirectional | Analog channel 2 input/output of the 8-channel switch. |
| 16 | VDD | power_in | Positive supply; recommended +5V to +15V, absolute maximum -0.5V to +18V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | SOP-16 |
| Category | Interface |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `CD4051BM-JSM`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files: `cd4051bm-jsm-etched.step` / `cd4051bm-jsm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd4051bm-jsm.step` / `cd4051bm-jsm.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [JSMSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603103974585352192) (7 pp, sha256 `92801855546b7d51`, retrieved 2026-10-22, 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](docs/cd4051bm-jsm-datasheet.pdf)