# CD4020BNSR

**Texas Instruments** · Counters, Dividers · SO-16-208mil

CD4020BNSR from Texas Instruments, in a SO-16-208mil. 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 | Q12 | output | Buffered counter output of stage 12. |
| 2 | Q13 | output | Buffered counter output of stage 13. |
| 3 | Q14 | output | Buffered counter output of stage 14, the last stage of the 14-stage ripple counter. |
| 4 | Q6 | output | Buffered counter output of stage 6. |
| 5 | Q5 | output | Buffered counter output of stage 5. |
| 6 | Q7 | output | Buffered counter output of stage 7. |
| 7 | Q4 | output | Buffered counter output of stage 4. |
| 8 | VSS | power_in | Ground/negative supply terminal; all voltages are referenced to VSS. |
| 9 | Q1 | output | Buffered counter output of stage 1. |
| 10 | φ | input | Input pulse (clock) line with Schmitt-trigger action; the counter advances one count on the negative transition of each pulse. |
| 11 | RESET | input | Reset input; a high level resets the counter to its all-zeros state. |
| 12 | Q9 | output | Buffered counter output of stage 9. |
| 13 | Q8 | output | Buffered counter output of stage 8. |
| 14 | Q10 | output | Buffered counter output of stage 10. |
| 15 | Q11 | output | Buffered counter output of stage 11. |
| 16 | VDD | power_in | Positive supply voltage, recommended 3 V to 18 V, absolute maximum -0.5 V to +20 V referenced to VSS. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SO-16-208mil |
| Category | Logic |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `CD4020BNSR`
- Footprint: `Adom_Gen:Texas_Instruments_CD4020`
- 3D model: SO-16-208mil (KiCad packages3D, STEP)
- 3D model files: `cd4020bnsr-etched.step` / `cd4020bnsr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd4020bnsr.step` / `cd4020bnsr.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/cd4020bnsr.pdf) (29 pp, sha256 `07aea60876b3c16c`, retrieved 2026-10-18, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cd4020bnsr-datasheet.pdf)