# CYHCPL2531

**OCIC** · Transistor Output Optocoupler · DIP-8

CYHCPL2531 from OCIC, in a DIP-8. 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 | A1 | passive | Anode of input LED 1 (+); forward current IF(avg) max 25 mA, reverse voltage VR max 5 V. |
| 2 | K1 | passive | Cathode of input LED 1 (-); forward current IF(avg) max 25 mA, reverse voltage VR max 5 V. |
| 3 | K2 | passive | Cathode of input LED 2 (-); forward current IF(avg) max 25 mA, reverse voltage VR max 5 V. |
| 4 | A2 | passive | Anode of input LED 2 (+); forward current IF(avg) max 25 mA, reverse voltage VR max 5 V. |
| 5 | GND | power_in | Common ground for the output side of both channels. |
| 6 | VO2 | output | Open-collector transistor output of channel 2, with output voltage rated -0.5 to 20 V and average output current max 8 mA. |
| 7 | VO1 | output | Open-collector transistor output of channel 1, with output voltage rated -0.5 to 20 V and average output current max 8 mA. |
| 8 | VCC | power_in | Positive supply for the output side of both channels, with absolute maximum supply voltage of -0.5 to 30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | OCIC |
| Package | DIP-8 |
| Category | Optocoupler |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `CYHCPL2531`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `cyhcpl2531-etched.step` / `cyhcpl2531-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cyhcpl2531.step` / `cyhcpl2531.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [OCIC datasheet](docs/cyhcpl2531-datasheet.pdf) (6 pp, sha256 `63b2a2a7d93a28c7`, retrieved 2026-10-27, 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:** 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/cyhcpl2531-datasheet.pdf)