# SN74HC190N

**XBLW** · Counters, Dividers · DIP-16

SN74HC190N from XBLW, in a DIP-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 | D1 | input | Parallel data input 1, loaded into the counter when PL is LOW. |
| 2 | Q1 | output | Flip-flop output 1 of the counter. |
| 3 | Q0 | output | Flip-flop output 0 of the counter. |
| 4 | CE | input | Count enable input, active LOW; a HIGH level inhibits counting. |
| 5 | U/D | input | Up/down input that sets the counting direction (LOW counts up, HIGH counts down). |
| 6 | Q2 | output | Flip-flop output 2 of the counter. |
| 7 | Q3 | output | Flip-flop output 3 of the counter. |
| 8 | GND | power_in | Ground (0V). |
| 9 | D3 | input | Parallel data input 3, loaded into the counter when PL is LOW. |
| 10 | D2 | input | Parallel data input 2, loaded into the counter when PL is LOW. |
| 11 | PL | input | Asynchronous parallel load input, active LOW; overrides counting. |
| 12 | TC | output | Terminal count output; goes HIGH at zero in count-down or at 9 in count-up mode. |
| 13 | RC | output | Ripple clock output, active LOW; follows the clock pulse when TC is HIGH and CE is LOW. |
| 14 | CP | input | Clock input, LOW-to-HIGH edge-triggered. |
| 15 | D0 | input | Parallel data input 0, loaded into the counter when PL is LOW. |
| 16 | VCC | power_in | Supply voltage; recommended 2.0V to 6.0V, absolute maximum 7.0V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XBLW |
| Package | DIP-16 |
| Category | Logic |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `SN74HC190N`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `sn74hc190n-etched.step` / `sn74hc190n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74hc190n.step` / `sn74hc190n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XBLW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602767345081466880) (22 pp, sha256 `38127def113ffaa5`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/sn74hc190n-datasheet.pdf)