# 6N137-L

**Lite On** · Logic Output Optoisolators · DIP-8

6N137-L from Lite On, 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; internally not connected on the input side. |
| 2 | ANODE | passive | LED anode input; recommended high-level input current IFH is 5 to 15 mA, with 20 mA maximum average forward current. |
| 3 | CATHODE | passive | LED cathode input; return for the LED current, with reverse input voltage limited to 5 V. |
| 4 | NC | unconnected | No connection; internally not connected on the input side. |
| 5 | GND | power_in | Output-side ground; a 0.1 uF bypass capacitor must be connected between pin 8 and pin 5. |
| 6 | VO | output | Open-collector Schottky-clamped output, needs pull-up resistor RL of 330 ohm to 4 kOhm, 7 V maximum output voltage and 50 mA maximum collector current. |
| 7 | VE | input | Enable input to strobe the detector; low level 0 to 0.8 V disables output to high, high level 2 V to VCC, may be left NC (output follows LED), maximum VCC+0.5 V. |
| 8 | VCC | power_in | Supply voltage, 2.7 to 3.6 V or 4.5 to 5.5 V recommended, 7 V absolute maximum, with 0.1 uF bypass to pin 5. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Lite On |
| 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 |
|---|---|---|---|---|---|---|---|
| Average Forward Input Current | IF |  |  | 20 | mA | Note 2 | 6 |
| Reverse Input Voltage | VR |  |  | 5 | V |  | 6 |
| Power Dissipation | PI |  |  | 40 | mW |  | 6 |
| Enable Input Current | IE |  |  | 5 | mA |  | 6 |
| Output Collector Current | IO |  |  | 50 | mA |  | 6 |
| Output Collector Voltage | VO |  |  | 7 | V |  | 6 |
| Output Collector Power Dissipation | Po |  |  | 85 | mW |  | 6 |
| Isolation Voltage | Viso |  |  | 5000 | Vrms |  | 6 |
| Supply Voltage | VCC |  |  | 7 | V |  | 6 |
| Operating Temperature | Topr | -40 |  | 85 | oC |  | 6 |
| Storage Temperature | Tstg | -55 |  | 125 | oC |  | 6 |
| Lead Solder Temperature | Tsol |  |  | 260 | oC | 260oC for 10 seconds (note 2) | 6 |
| Operating Temperature | TA | -40 |  | 85 | oC |  | 7 |
| Supply Voltage (3.3V range) | VCC | 2.7 |  | 3.6 | V |  | 7 |
| Supply Voltage (5V range) | VCC | 4.5 |  | 5.5 | V |  | 7 |
| Low Level Input Current | IFL | 0 |  | 250 | μA |  | 7 |
| High Level Input Current | IFH | 5 |  | 15 | mA |  | 7 |
| Low Level Enable Voltage | VEL | 0 |  | 0.8 | V |  | 7 |
| High Level Enable Voltage | VEH | 2 |  |  | V |  | 7 |
| Output Pull-up Resistor (min) | RL | 330 |  |  | Ω |  | 7 |
| Output Pull-up Resistor (max) | RL |  |  | 4 | kΩ |  | 7 |
| Fan Out | N |  |  | 5 | TTL Loads | at RL=1kΩ per channel | 7 |
| Input Forward Voltage (3.3V table) | VF |  | 1.38 | 1.7 | V | IF= 10mA | 8 |
| Input Reverse Voltage (3.3V table) | BVR | 5 |  |  | V | IR = 10μA | 8 |
| Input Threshold Current (3.3V table) | ITH |  | 1.5 | 5 | mA | VE = 2V, VCC = 3.3V, VO = 0.6V, IOL (sinking) = 13mA | 8 |
| High Level Supply Current (3.3V table) | ICCH |  | 3.8 | 10 | uA | VE= 0.5V, VCC= 3.3V, IF = 0mA | 8 |
| Low Level Supply Current (3.3V table) | ICCL |  | 5.8 | 13 | mA | VE= 0.5V, VCC= 3.3V, IF =10mA | 8 |
| High Level Enable Current (3.3V table) | IEH |  |  | -1.6 | mA | VCC = 3.3V, VE = 2V | 8 |
| Low Level Enable Current (3.3V table) | IEL |  | -0.41 | -1.6 | mA | VCC = 3.3V, VE = 0.5V | 8 |
| High Level Enable Voltage (3.3V table) | VEH | 2 |  |  | V |  | 8 |
| Low Level Enable Voltage (3.3V table) | VEL |  |  | 0.8 | V |  | 8 |
| High Level Output Current (3.3V table) | IOH |  | 5 | 100 | μA | VE = 2V, VCC = 3.3V, VO = 3.3V, IF = 250μA | 8 |
| Low Level Output Voltage (3.3V table) | VOL |  | 0.3 | 0.6 | V | VE = 2V, VCC =3.3V, IF = 5mA, IOL (sinking) = 13mA | 8 |
| Input Forward Voltage (5V table) | VF |  | 1.38 | 1.7 | V | IF= 10mA | 9 |
| Input Reverse Voltage (5V table) | BVR | 5 |  |  | V | IR = 10μA | 9 |
| Input Threshold Current (5V table) | ITH |  | 1.35 | 5 | mA | VCC = 5.5V, VO = 0.6V, IOL > 13mA | 9 |
| High Level Supply Current (5V table) | ICCH |  | 6.1 | 10 | uA | VE = 0.5V, VCC = 5.5V, IF = 0mA | 9 |
| Low Level Supply Current (5V table) | ICCL |  | 8.3 | 13 | mA | VE = 0.5V, VCC= 5.5V, IF =10mA | 9 |
| High Level Enable Current (5V table) | IEH |  | -0.6 | -1.6 | mA | VCC = 5.5V, VE = 2V | 9 |
| Low Level Enable Current (5V table) | IEL |  | -0.9 | -1.6 | mA | VCC = 5.5V, VE = 0.5V | 9 |
| High Level Enable Voltage (5V table) | VEH | 2 |  |  | V |  | 9 |
| Low Level Enable Voltage (5V table) | VEL |  |  | 0.8 | V |  | 9 |
| High Level Output Current (5V table) | IOH |  | 0.9 | 100 | μA | VE = 2V, VCC = 5.5V, VO = 5.5V, IF = 250μA | 9 |
| Low Level Output Voltage (5V table) | VOL |  | 0.4 | 0.6 | V | VCC =5.5V, IF = 5mA, IOL (sinking) = 13mA | 9 |
| Propagation Delay Time to High Output Level (3.3V) | tPLH | 25 | 48 | 90 | ns | RL = 350Ω, CL =15pF | 10 |
| Propagation Delay Time to Low Output Level (3.3V) | tPHL | 25 | 35 | 75 | ns |  | 10 |
| Propagation Delay Skew (3.3V) | tPSK |  |  | 40 |  |  | 10 |
| Propagation Delay Time to High Output Level (5V, TA=25°C) | tPLH | 25 | 40 | 75 | ns | TA = 25oC RL=350Ω, CL =15pF | 10 |
| Propagation Delay Time to High Output Level (5V, over temperature) | tPLH |  |  | 100 | ns | Specified over recommended temperature, 4.5V ≤ VCC ≤ 5.5V (table footer) | 10 |
| Propagation Delay Time to Low Output Level (5V, TA=25°C) | tPHL | 25 | 32 | 75 | ns | TA = 25oC RL=350Ω, CL =15pF | 10 |
| Propagation Delay Time to Low Output Level (5V, over temperature) | tPHL |  |  | 100 | ns | Specified over recommended temperature, 4.5V ≤ VCC ≤ 5.5V (table footer) | 10 |
| Propagation Delay Skew (5V) | tPSK |  |  | 40 |  |  | 10 |
| Logic High Common Mode Transient Immunity (3.3V) | /CMH/ | 10 | 15 |  | kV/μs | VCC = 3.3V, VCM = 1000V, RL = 350Ω, IF = 0mA, TA = 25oC | 11 |
| Logic High Common Mode Transient Immunity (5V) | /CMH/ | 10 | 15 |  | kV/μs | VCC = 5V, VCM = 1000V, RL = 350Ω, IF = 0mA, TA = 25oC | 11 |
| Logic Low Common Mode Transient Immunity (3.3V) | /CML/ | 10 | 15 |  | kV/μs | VCC = 3.3V, VCM = 1000V, RL = 350Ω, IF = 10.0mA, TA = 25oC | 11 |
| Logic Low Common Mode Transient Immunity (5V) | /CML/ | 10 | 15 |  | kV/μs | VCC = 5V, VCM = 1000V, RL = 350Ω, IF = 10.0mA, TA = 25oC | 11 |
| Input-Output Insulation Leakage Current | II-O |  |  | 1 | μA | 45% RH, t = 5s, VI-O = 3kV DC, TA =25oC | 12 |
| Withstand Insulation Test Voltage | VISO | 5000 |  |  | VRMS | RH ≤ 50%, t = 1min, TA = 25oC | 12 |

## CAD (KiCad official)

- Symbol: `6N137-L`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files: `6n137-l-etched.step` / `6n137-l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `6n137-l.step` / `6n137-l.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Lite On datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905267807866880) (19 pp, sha256 `84ad24fc0e963259`, retrieved 2026-10-15, 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/6n137-l-datasheet.pdf)