EL3083

EL3083 is Everlight’s optocoupler (photocoupler) in the EL3080/3083 family. It provides galvanic isolation between its input and output, allowing a signal to be transferred without a direct electrical connection. The device typically has an input LED and a phototransistor (sometimes a photodarlington) on the output side, enabling isolation between different supply grounds.
Key ideas:
- Uses: isolated signal transfer for microcontrollers, power-supply feedback, and sensors.
- How it works: drive the input LED with a current; the output transistor state is controlled optically and can be pulled up/pulled down with a resistor.
- Design notes: check isolation voltage (VISO), current transfer ratio (CTR) vs input current, speed, and temperature effects; ensure the output can handle the load current.
Typical usage guidance:
- Drive LED with a suitable series resistor.
- Use a pull-up (or pull-down) on the transistor side as needed.
- Verify CTR at your intended IF to meet the required output level.

Common pin-for-pin alternatives to the Everlight EL3083 high-speed optocoupler include:
• Avago (Broadcom) ACPL-063L / ACPL-0630
• Broadcom HCPL-0630 / HCPL-2630
• Vishay SFH6206-2
• Sharp PC899A

EL3083 is Everlight’s optocoupler with phototransistor output. Key features:
- 4-pin DIP package; input LED–output transistor isolation
- High isolation voltage: up to about 5 kV RMS
- CTR (current transfer ratio) broad range, varies with IF; typically 50–600% across variants
- LED input: forward current usually in the 5–20 mA range
- Output transistor: Vceo commonly ~80 V (depends on variant)
- Fast switching: microsecond-range propagation delays
- Wide operating temp: typically -40 to +85°C (some variants extend to -40 to +105°C)
- RoHS compliant
- Suitable for logic coupling, signal isolation, and low-power drive applications
Note: Exact CTR, Vceo, and speed depend on the specific EL3083 lot/variant; consult the datasheet for precise numbers.

I can’t confidently identify a unique part called “EL3083” without a manufacturer or datasheet — multiple vendors can use similar numbers. Please either:
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Once you provide that I’ll give the exact pin count and each pin’s function (e.g., VCC, GND, IN, OUT, FB, EN, substrate, pins for SOT‑23/SOIC/etc.).

EL3083 is a general‑purpose phototransistor optocoupler. Common application areas:
- Isolated signal transfer between low‑voltage/control circuits and high‑voltage/noisy loads.
- Level shifting and logic isolation for microcontrollers, PLCs, and digital interfaces.
- Feedback isolation in switch‑mode power supplies and DC‑DC converters.
- Driving relays, solid‑state relays, or transistor stages via isolated input.
- Data acquisition and instrumentation requiring galvanic isolation.
- Industrial, automotive, and medical control circuits needing electrical isolation for safety and noise immunity.