# SN74HC390N

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

SN74HC390N 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 | 1CP0 | input | Clock input of the divide-by-2 section of counter 1, triggered on the HIGH-to-LOW transition. |
| 2 | 1MR | input | Asynchronous master reset input of counter 1, active HIGH. |
| 3 | 1Q0 | output | Flip-flop output Q0 of counter 1. |
| 4 | 1CP1 | input | Clock input of the divide-by-5 section of counter 1, triggered on the HIGH-to-LOW transition. |
| 5 | 1Q1 | output | Flip-flop output Q1 of counter 1. |
| 6 | 1Q2 | output | Flip-flop output Q2 of counter 1. |
| 7 | 1Q3 | output | Flip-flop output Q3 of counter 1. |
| 8 | GND | power_in | Ground (0 V). |
| 9 | 2Q3 | output | Flip-flop output Q3 of counter 2. |
| 10 | 2Q2 | output | Flip-flop output Q2 of counter 2. |
| 11 | 2Q1 | output | Flip-flop output Q1 of counter 2. |
| 12 | 2CP1 | input | Clock input of the divide-by-5 section of counter 2, triggered on the HIGH-to-LOW transition. |
| 13 | 2Q0 | output | Flip-flop output Q0 of counter 2. |
| 14 | 2MR | input | Asynchronous master reset input of counter 2, active HIGH. |
| 15 | 2CP0 | input | Clock input of the divide-by-2 section of counter 2, triggered on the HIGH-to-LOW transition. |
| 16 | VCC | power_in | Supply voltage. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SN74HC390N`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `sn74hc390n-etched.step` / `sn74hc390n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74hc390n.step` / `sn74hc390n.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/8602767409460109312) (16 pp, sha256 `43ce72ce5aa76e92`, retrieved 2026-10-14, 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/sn74hc390n-datasheet.pdf)