TIL192 Dual-Channel Optocoupler Technical Summary

Overview

The TIL192 is a dual-channel optocoupler device that provides electrical isolation between input and output circuits through optical coupling. Each channel consists of a gallium-arsenide (GaAs) infrared light-emitting diode (LED) coupled with a silicon npn phototransistor in a single 8-pin package. This configuration allows for signal transmission while maintaining complete electrical isolation between circuits, making it ideal for applications requiring noise immunity and safety isolation.

The TIL192 is part of a series that includes single-channel (TIL191) and quad-channel (TIL193) variants, providing design flexibility for different application requirements. The device is available in standard and selected current-transfer ratio (CTR) versions, with the standard version tested for 20% minimum CTR, while A and B suffix versions offer 50% and 100% minimum CTR respectively.

Key Features

• Dual-channel optocoupler in compact 8-pin package
• GaAs infrared LED coupled with silicon npn phototransistor
• Electrical isolation test voltage: 2500 V_rms minimum
• Standard current-transfer ratio: 20% minimum (TIL192)
• High CTR versions available: 50% min (TIL192A), 100% min (TIL192B)
• Fast response time: typically 3 μs (turn-on) and 2 μs (turn-off)
• Wide operating temperature range: -55°C to +100°C
• Industry-standard pinout for easy replacement
• Compact DIP (Dual In-line Package) form factor
• LED forward current: 60 mA maximum
• Phototransistor collector-emitter voltage: 30 V maximum

Applications

The TIL192 optocoupler is designed for a wide range of applications requiring electrical isolation and noise immunity:

Industrial Control Systems

• Programmable logic controller (PLC) I/O isolation
• Motor control circuits
• Industrial automation interfaces
• Noise suppression in harsh electrical environments

Power Electronics

• Switch-mode power supply feedback circuits
• Inverter and converter control
• Gate drive isolation for power semiconductors

Communication Systems

• Line receivers with electrical isolation
• Modem interfaces
• Telecommunication equipment

Medical Equipment

• Patient-isolated monitoring systems
• Medical instrumentation interfaces

General Purpose

• Microprocessor system interfaces
• Ground loop elimination
• Signal level shifting
• Digital logic isolation

Electrical Characteristics

Absolute Maximum Ratings

• LED Forward Current: 60 mA (continuous)
• LED Reverse Voltage: 3 V
• Collector-Emitter Voltage: 30 V
• Emitter-Collector Voltage: 7 V
• Collector Current: 50 mA
• Total Power Dissipation: 150 mW per channel
• Operating Temperature Range: -55°C to +100°C
• Storage Temperature Range: -55°C to +125°C
• Isolation Voltage: 2500 V_rms (1 minute)

Optical Characteristics (T_A = 25°C unless otherwise noted)

• Current Transfer Ratio (I_F = 10 mA, V_CE = 10 V):
  • TIL192: 20% minimum
  • TIL192A: 50% minimum
  • TIL192B: 100% minimum
• LED Forward Voltage (I_F = 10 mA): 1.15 V typical, 1.5 V maximum
• Dark Current (V_CE = 10 V): 50 nA maximum
• Collector-Emitter Saturation Voltage (I_F = 10 mA, I_C = 2 mA): 0.4 V maximum

Switching Characteristics (T_A = 25°C)

• Turn-on Time (I_F = 10 mA, V_CC = 10 V, R_L = 100 Ω): 3 μs typical
• Turn-off Time (I_F = 10 mA, V_CC = 10 V, R_L = 100 Ω): 2 μs typical
• Rise Time (10% to 90%): 3 μs typical
• Fall Time (90% to 10%): 2 μs typical

Package Information

8-Pin Dual In-Line Package (DIP)

• Package Type: Molded plastic DIP
• Pin Count: 8
• Pin Spacing: 2.54 mm (0.1 inch) standard
• Row Spacing: 7.62 mm (0.3 inch)
• Package Dimensions: 9.65 mm x 6.35 mm x 3.3 mm (body)
• Lead Material: Copper alloy
• Lead Finish: Solder-plated
• Flammability Rating: UL94 V-0
• Moisture Sensitivity Level (MSL): MSL 1 (unlimited floor life at ≤30°C/85% RH)

Pin Configuration

• Pin 1: Anode, Channel 1 LED
• Pin 2: Cathode, Channel 1 LED
• Pin 3: Anode, Channel 2 LED
• Pin 4: Cathode, Channel 2 LED
• Pin 5: Emitter, Channel 2 Phototransistor
• Pin 6: Collector, Channel 2 Phototransistor
• Pin 7: Emitter, Channel 1 Phototransistor
• Pin 8: Collector, Channel 1 Phototransistor

Reliability and Safety

The TIL192 optocoupler is designed for high reliability in demanding applications:

• UL Recognized (File E69938)
• CSA Certified
• IEC/EN/DIN EN 60747-5-2 compliant
• Isolation voltage: 2500 V_rms for 1 minute
• Creepage distance: 7.5 mm minimum
• Clearance distance: 7.5 mm minimum
• CTI (Comparative Tracking Index): >175 V

Design Considerations

LED Drive Circuit

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