# CD4051BPWR

**Texas Instruments** · Analog Switches, Multiplexers · TSSOP-16

CD4051BPWR from Texas Instruments, in a TSSOP-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 | CH4 | bidirectional | Channel 4 in/out. Analog signal path to/from COM when address A/B/C = 100 and INH = 0. rON typ 125 Ω at VDD=15V. |
| 2 | CH6 | bidirectional | Channel 6 in/out. Analog signal path to/from COM when address A/B/C = 110 and INH = 0. |
| 3 | COM | bidirectional | Common out/in. Bidirectional analog common terminal connected to the selected channel (CH0-CH7) when INH = 0. |
| 4 | CH7 | bidirectional | Channel 7 in/out. Analog signal path to/from COM when address A/B/C = 111 and INH = 0. |
| 5 | CH5 | bidirectional | Channel 5 in/out. Analog signal path to/from COM when address A/B/C = 101 and INH = 0. |
| 6 | INH | input | Inhibit input. When high, disables all channels (all switches OFF). When low, the channel selected by A/B/C is connected to COM. Digital logic input referenced to VSS/VDD; VIH ≥ 11V at VDD=15V. |
| 7 | VEE | power_in | Negative analog supply input. Sets the lower bound of the analog signal range. For single-supply operation tie to VSS; for dual-supply operation typically −5V to −10V. VDD−VEE ≤ 20V. |
| 8 | VSS | power_in | Ground / digital logic reference. Reference for the A/B/C/INH digital control inputs. |
| 9 | C | input | Channel select C (MSB of the 3-bit channel address). Digital logic input; combined with A and B selects one of CH0-CH7 when INH = 0. |
| 10 | B | input | Channel select B (middle bit of the 3-bit channel address). Digital logic input. |
| 11 | A | input | Channel select A (LSB of the 3-bit channel address). Digital logic input. |
| 12 | CH3 | bidirectional | Channel 3 in/out. Analog signal path to/from COM when address A/B/C = 011 and INH = 0. |
| 13 | CH0 | bidirectional | Channel 0 in/out. Analog signal path to/from COM when address A/B/C = 000 and INH = 0. |
| 14 | CH1 | bidirectional | Channel 1 in/out. Analog signal path to/from COM when address A/B/C = 001 and INH = 0. |
| 15 | CH2 | bidirectional | Channel 2 in/out. Analog signal path to/from COM when address A/B/C = 010 and INH = 0. |
| 16 | VDD | power_in | Positive supply input. 3V to 20V referenced to VSS. Also serves as the digital-input high reference (VIH ≥ 0.7·VDD). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Interface |
| Pins | 16 |

## Ordering variants

Same part, different packaging or reel option.

- `CD4051BPWR`
- `CD4051BPWRE`
- `CD4051BPWRJ`
- `CD4051BPWRM`
- `CD4051BPWRNS`

## CAD (KiCad official)

- Symbol: `CD4051BPWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `cd4051bpwr-etched.step` / `cd4051bpwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd4051bpwr.step` / `cd4051bpwr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/cd4051b.pdf) (39 pp, sha256 `c234939dccf18398`, retrieved 2026-08-17, tier: manufacturer)
- **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/cd4051bpwr-datasheet.pdf)