TIL919 Quad-Channel Optocoupler Technical Summary

Overview

The TIL919 is a quad-channel optocoupler device that provides electrical isolation between input and output circuits through optical coupling. Each channel consists of a gallium-arsenide (GaAs) light-emitting diode (LED) optically coupled to a silicon n-p-n Darlington phototransistor. This device is part of a family that includes single-channel (TIL917) and dual-channel (TIL918) variants, with the TIL919 offering four isolated channels in a 16-pin package.

The TIL919 is available in standard and selected current-transfer ratio (CTR) versions, with suffix designations indicating enhanced performance levels. The device is designed for reliable operation in applications requiring high voltage isolation and noise immunity between circuits.

Key Features

• Quad-channel isolation: Four independent optocoupler channels in a single package
• Darlington phototransistor output: Provides high current gain for improved sensitivity
• Current-transfer ratio options:
  • Standard version: 20% minimum CTR
  • A suffix: 50% minimum CTR
  • B suffix: 100% minimum CTR
  • C suffix: 200% minimum CTR
• High isolation voltage: Provides safe electrical separation between input and output circuits
• GaAs LED: Offers reliable light emission with consistent performance
• Wide operating temperature range: Suitable for industrial environments

Applications

The TIL919 optocoupler is designed for use in a variety of applications requiring electrical isolation and signal transmission:

• Industrial control systems: Isolate logic circuits from power stages
• Power supply feedback circuits: Provide isolated voltage feedback
• Medical equipment: Ensure patient safety through proper isolation
• Telecommunications: Interface between different voltage domains
• Motor control systems: Isolate control signals from power stages
• Data acquisition systems: Protect sensitive measurement circuits
• Ground loop elimination: Break ground loops in interconnected systems

Electrical Characteristics

Input Characteristics (LED Side)

• Forward current (IF): 60 mA maximum
• Forward voltage (VF): 1.5V typical at 10 mA
• Reverse voltage (VR): 3V maximum
• Power dissipation: 100 mW maximum per channel

Output Characteristics (Phototransistor Side)

• Collector-emitter voltage (VCEO): 30V minimum
• Emitter-collector voltage (VECO): 7V maximum
• Collector current (IC): 150 mA maximum
• Power dissipation: 250 mW maximum per channel
• Dark current (ICEO): 100 nA maximum at VCE = 10V

Transfer Characteristics

• Current transfer ratio (CTR):
  • Standard: 20% minimum
  • A suffix: 50% minimum
  • B suffix: 100% minimum
  • C suffix: 200% minimum
• Isolation voltage: 2500Vrms minimum
• Response time (turn-on): 15 μs typical
• Response time (turn-off): 100 μs typical

Absolute Maximum Ratings

• Total device power dissipation: 500 mW
• Operating temperature range: -55°C to +100°C
• Storage temperature range: -55°C to +125°C
• Lead soldering temperature (10 sec): 260°C maximum

Package Information

The TIL919 is available in a 16-pin dual in-line package (DIP) with the following mechanical characteristics:

Package Dimensions

• Overall length: 21.1 mm (0.831 inches) maximum
• Body length: 18.5 mm (0.728 inches) maximum
• Overall width: 10.2 mm (0.400 inches) maximum
• Body width: 9.2 mm (0.362 inches) maximum
• Pin spacing: 2.54 mm (0.100 inches) between pins
• Row spacing: 7.62 mm (0.300 inches) typical
• Pin diameter: 0.51 mm (0.020 inches) minimum
• Pin length: 5.08 mm (0.200 inches) maximum below seating plane

Package Outline

The device follows standard DIP package dimensions with the following key features:

• All linear dimensions are in millimeters (inches in parentheses)
• Pin 1 identification notch on package top
• Seating plane reference for proper board mounting
• Pin centerline tolerance of ±0.25 mm (0.010 inches) from true position
• Lead angle of 10°±5° from vertical

Handling and Mounting

• ESD sensitive device - proper handling procedures required
• Recommended soldering profile per IPC standards
• Wave soldering acceptable with proper temperature control
• Manual soldering should be limited to 3 seconds per pin at 350°C maximum

Reliability and Compliance

The TIL919 optocoupler meets or exceeds the following standards and reliability requirements:

• Manufactured under Texas Instruments' quality management system
• 100% production testing of key parameters
• High temperature operating life testing
• Temperature cycling qualification
• Moisture sensitivity level (MSL) rating of MSL 1

Ordering Information

The TIL919 is available in several variants based on current transfer ratio:

• TIL919: Standard version with 20% minimum CTR
• TIL919A: 50% minimum CTR version
• TIL919B: 100% minimum CTR version
• TIL919C: 200% minimum CTR version

All versions are available in tube packaging or tape-and-reel for automated assembly.