TLP781 surface-mount optocoupler SOP-4

The TLP781 Surface-Mount Optocoupler SOP-4 is a high-performance optoelectronic component used for signal isolation between different parts of a circuit. It consists of a high-efficiency infrared LED optically coupled to a phototransistor housed in a compact SOP-4 package. This configuration provides excellent electrical isolation and fast response time, making it ideal for switching power supplies, industrial control, and communication systems.

Key Features of TLP781 Surface-Mount Optocoupler SOP-4:

• Compact SOP-4 Package: Space-saving surface-mount design suitable for dense PCB layouts.
• High Isolation Voltage: Offers isolation voltage up to 5000 Vrms between input and output.
• Phototransistor Output: Ensures reliable and fast switching performance.
• Wide Operating Temperature: Performs efficiently over a wide temperature range.
• Low Input Drive Current: Reduces power consumption while maintaining performance.

Technical Specifications of TLP781 Surface-Mount Optocoupler SOP-4:

• Input Type: Infrared LED
• Output Type: NPN Phototransistor
• Isolation Voltage: 5000 Vrms (1 minute)
• Forward Current (I_F): 50mA (max)
• Collector-Emitter Voltage (V_CEO): 80V
• Collector Current (I_C): 50mA (max)
• CTR (Current Transfer Ratio): 50% to 600% @ I_F = 5mA, V_CE = 5V
• Operating Temperature: -55°C to +110°C

Mechanical Specifications of TLP781 Surface-Mount Optocoupler SOP-4:

• Package Type: SOP-4 (Small Outline Package)
• Mounting Type: Surface Mount
• Lead Finish: Tin-plated for RoHS compliance
• Body Material: Molded epoxy plastic

Dimensions:

• Length: 4.6 mm
• Width: 4.4 mm
• Height: 2.6 mm
• Lead Pitch: 2.54 mm

Mounting Options:

• SMD Mounting: Designed for automated pick-and-place systems on surface-mount PCBs.
• Reflow Compatible: Suitable for standard SMT soldering processes.

Schematic Diagram, Connection, Wiring and Pinout of TLP781:

• Pin 1: Anode (LED)
• Pin 2: Cathode (LED)
• Pin 3: Emitter (Phototransistor)
• Pin 4: Collector (Phototransistor)
• Connection: Drive the LED side with a current-limiting resistor; the output transistor side connects to logic input or microcontroller pin.

Datasheet of TLP781 Surface-Mount Optocoupler SOP-4:

• Download TLP781 Datasheet (PDF)

Applications of TLP781 Surface-Mount Optocoupler SOP-4:

• Switching Power Supplies: Provides galvanic isolation between high-voltage and control sections.
• Microcontroller Interfaces: Enables safe interfacing between noisy signals and logic circuits.
• Signal Isolation: Useful in measuring and isolating control signals.
• Industrial Control Systems: Prevents ground loops and signal interference.
• Consumer Electronics: Used in switching devices and logic isolation circuits.

Equivalent of TLP781 Surface-Mount Optocoupler SOP-4:

• PC817: Popular phototransistor optocoupler with similar specifications
• EL817: Surface-mount compatible optoisolator used in switching applications
• H11L1: Logic output optocoupler with higher switching speed
• 4N35: General-purpose optoisolator with DIP package alternative

Package Includes:

• 1 x TLP781 Surface-Mount Optocoupler SOP-4