# 6N138M

**UMW** · Logic Output Optoisolators · DIP-8

6N138M from UMW, 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 | NC | unconnected | No connection; pin 1 is drawn with no internal connection and no label in the pinning diagram. |
| 2 | Anode | passive | Anode of the AlGaAs infrared emitting diode input (absolute maximum forward current 25 mA, reverse voltage 5 V). |
| 3 | Cathode | passive | Cathode of the infrared emitting diode input (absolute maximum forward current 25 mA, reverse voltage 5 V). |
| 4 | NC | unconnected | No connection; pin 4 is drawn with no internal connection and no label in the pinning diagram. |
| 5 | Emitter | passive | Emitter of the output darlington phototransistor, which serves as the output-side ground return. |
| 6 | Collector | output | Collector of the output darlington transistor, the open-collector output (VO absolute maximum -0.5 to 18 V, IO maximum 60 mA). |
| 7 | VB | power_in | Base connection of the output phototransistor (VB), used for an optional base-emitter resistor; the datasheet states no other limits for it. |
| 8 | VCC | power_in | Output-side supply voltage, absolute maximum -0.5 to 18 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | DIP-8 |
| Category | Optoisolators |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Forward Current | IF |  |  | 25 | mA |  | 3 |
| Peak Forward Current | IFP |  |  | 50 | mA | 50% duty, 1ms P.W (Note 1) | 3 |
| Peak Transient Current | IF(trans) |  |  | 1 | A | ≤1μs P.W, 300pps (Note 2) | 3 |
| Reverse Voltage | VR |  |  | 5 | V |  | 3 |
| Input Power Dissipation | PI |  |  | 100 | mW |  | 3 |
| Supply Voltage | VCC | -0.5 |  | 18 | V |  | 3 |
| Output Voltage | VO | -0.5 |  | 18 | V |  | 3 |
| Output Current | IO |  |  | 60 | mA |  | 3 |
| Emitter-Base Reverse Voltage | VEBR |  |  | 0.5 | V |  | 3 |
| Output Power Dissipation | PO |  |  | 100 | mW |  | 3 |
| Total Power Dissipation | Ptot |  |  | 200 | mW |  | 3 |
| Isolation Voltage | Viso |  |  | 5000 | Vrms | AC for 1 minute, R.H. = 40 ~ 60% (Note 3) | 3 |
| Operating Temperature | Topr | -55 |  | 100 | °C |  | 3 |
| Storage Temperature | Tstg | -55 |  | 150 | °C |  | 3 |
| Soldering Temperature | Tsol |  |  | 260 | °C | For 10 seconds (Note 4) | 3 |

## CAD (KiCad official)

- Symbol: `6N138M`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `6n138m-etched.step` / `6n138m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `6n138m.step` / `6n138m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757272661217566720) (12 pp, sha256 `734f6b554c60249f`, retrieved 2026-10-18, tier: lcsc)
- **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/6n138m-datasheet.pdf)