# CNY70

**Vishay** · Reflective Optical Interrupters · DIP-4

CNY70 from Vishay, in a DIP-4. 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 | A | passive | Anode of the infrared emitter LED (lambda_p = 950 nm). Drive through a current-limit resistor; typical I_F = 20 mA, V_F ~= 1.25 V (max 1.6 V at 50 mA). Absolute max forward current 50 mA continuous, 3 A pulsed (t_p <= 10 us); reverse voltage max 5 V. |
| 2 | C | passive | Cathode of the infrared emitter LED. Return path for the LED forward current; typically tied to sensor GND through the current-limit resistor. |
| 3 | E | passive | Emitter of the NPN phototransistor detector. Normally tied to sensor GND (or to a sense resistor for emitter-follower readout). |
| 4 | C | passive | Collector of the NPN phototransistor detector. Pull up through a load resistor to Vcc (V_CEO max 32 V, I_C max 50 mA). Typical output current under test I_C = 1 mA at I_F = 20 mA with a Kodak neutral card (white side) at d = 0.3 mm; dark current I_CEO <= 200 nA at V_CE = 20 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Vishay |
| Package | DIP-4 |
| Category | Sensor |
| Pins | 4 |

## Ordering variants

Same part, different packaging or reel option.

- `CNY70`

## CAD (KiCad official)

- Symbol: `CNY70`
- Footprint: `Package_DIP:DIP-4_W7.62mm`
- 3D model: DIP-4 (KiCad packages3D, STEP)
- 3D model files: `cny70-etched.step` / `cny70-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cny70.step` / `cny70.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`cny70.step`](cny70.step) | 158 KB | You want the bare part, or you mark your own boards. |
| [`cny70-etched.step`](cny70-etched.step) | 936 KB | You want the part with `CNY70` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 224 faces against 80 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [Vishay datasheet](docs/cny70-datasheet.pdf) (11 pp, sha256 `cac0716ccafb5b0b`, 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/cny70-datasheet.pdf)