LTV4N35 OptoCouple (opto Iscolator

The LTV4N35 is an optocoupler (or opto-isolator) with a phototransistor output and an input LED. It is designed to provide electrical isolation between input and output circuits, protecting sensitive components from high voltages and noise. It is commonly used in applications where digital signals need to be isolated across different voltage domains.

Key Specifications for LTV4N35

General Specifications

1. Type: Phototransistor optocoupler
2. Package: DIP-6 (through-hole, 6 pins)
3. Isolation Voltage: 5,000 Vrms (minimum)
4. Current Transfer Ratio (CTR): 50% to 600% (varies based on model and operating conditions)

Electrical Characteristics

1. Input LED Forward Voltage (V_F): Typically 1.2 V (at 20 mA)
2. LED Forward Current (I_F): Maximum 50 mA
3. Collector-Emitter Voltage (V_CEO): 30 V (maximum) for the output phototransistor
4. Collector Current (I_C): Up to 50 mA

Performance Characteristics

1. Isolation Voltage: 5,000 Vrms, providing a high level of electrical isolation between the input and output sides
2. Current Transfer Ratio (CTR): Ensures efficient signal transfer, with typical values ranging from 50% to 600%
3. Switching Speed: Moderate switching speed suitable for low- to medium-speed applications

Pin Configuration (DIP-6)

1. Anode (Pin 1): Positive terminal for LED input
2. Cathode (Pin 2): Negative terminal for LED input
3. NC (Pin 3): No connection
4. Emitter (Pin 4): Phototransistor emitter (output side)
5. Collector (Pin 5): Phototransistor collector (output side)
6. NC (Pin 6): No connection

Key Features

1. Electrical Isolation: Provides effective isolation between control and power circuits, reducing interference and protecting components
2. Wide CTR Range: High CTR for flexible design options
3. Compact Package: DIP-6 form factor allows easy integration into PCB designs and breadboards
4. Reliable Signal Transfer: Suitable for low- to medium-speed digital signals

Applications

1. Power Supply Isolation: Used to isolate feedback signals between high- and low-voltage sections in power supplies
2. Microcontroller Protection: Provides isolation for microcontrollers from high-voltage loads or noisy signals
3. Signal Isolation in Communication Systems: Isolates digital communication lines in industrial applications
4. Relay and Motor Control: Enables safe interfacing between digital circuits and high-power relays or motors

The LTV4N35 optocoupler is ideal for applications requiring secure, reliable isolation between circuits operating at different voltages, offering robust protection and moderate-speed performance in industrial, communication, and general-purpose electronic systems.