TLP290GB

The TLP290GB is a photocoupler (optoisolator) from Toshiba, designed for signal isolation in electronic circuits. It features a GaAs infrared LED paired with a phototransistor, providing electrical isolation between input and output (up to 3750Vrms).
Key specifications:
- Low input current (5mA typical)
- High isolation voltage (3750Vrms)
- Compact 4-pin SO6 package
- High current transfer ratio (CTR) for efficient signal transmission
Applications include:
- Industrial control systems
- Power supply feedback
- Noise isolation in digital circuits
The TLP290GB is RoHS-compliant and suitable for high-voltage environments, ensuring reliable signal transfer while preventing ground loops and voltage spikes.

Equivalent products to the TLP290GB (Toshiba optocoupler) include:
- PC817 (Sharp)
- LTV-817 (Lite-On)
- EL817 (Everlight)
- SFH618A (Vishay)
- H11AA1 (Broadcom)
These are similar 4-pin optocouplers with comparable specs (CTR ~50-600%, VISO ~5kV). Verify pinout and electrical characteristics for exact replacement.

The TLP290GB is a photocoupler (optoisolator) with the following key features:
- High Isolation Voltage: 3750 Vrms (min) for robust electrical isolation.
- Low Input Current: 5 mA (max) for efficient operation.
- Compact Package: 4-pin SO6 (small outline) for space-saving designs.
- High-Speed Switching: 1 µs (max) propagation delay for fast response.
- Wide Operating Temperature: -55°C to +110°C for harsh environments.
- Low Power Consumption: Ideal for energy-efficient applications.
- UL, CSA, and VDE Certified: Ensures compliance with safety standards.
Commonly used in industrial, automotive, and consumer electronics for signal isolation and noise immunity.

The TLP290GB is a 4-pin photocoupler (optoisolator) with the following functions:
1. Pin 1 (Anode) – LED anode (input side).
2. Pin 2 (Cathode) – LED cathode (input side).
3. Pin 3 (Emitter) – Phototransistor emitter (output side).
4. Pin 4 (Collector) – Phototransistor collector (output side).
It provides electrical isolation (up to 3750Vrms) and transfers signals via an infrared LED and a phototransistor. Common applications include signal isolation in power supplies, industrial controls, and digital circuits.
Key features:
- Compact DIP-4 package
- High isolation voltage
- Low power consumption

The TLP290GB is a SOP4 (Small Outline Package, 4-pin) photocoupler. It features a compact, surface-mount design with a lead pitch of 1.27mm, making it suitable for space-constrained applications. The package is RoHS-compliant and supports creepage/clearance distances for safety standards. Its slim profile (height: 2.1mm max) enhances PCB layout flexibility.