TCET1109G

Overview

The TCET1109G is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and operates within a temperature range of -40°C to +100°C. Key electrical specifications include a maximum collector-emitter voltage of 70 V, a maximum collector current of 50 mA, and a forward current rating of 60 mA. The device provides an isolation voltage of 5000 Vrms and exhibits a typical rise time of 3 µs and fall time of 4.7 µs. It is housed in a DIP-4 through-hole package with a power dissipation capacity of 265 mW.

Feature Summary

• Provides high-voltage isolation between input and output circuits
• Features fast switching speeds suitable for digital signal transmission
• Utilizes a standard DIP-4 package for easy integration into through-hole designs

Applications

• Industrial control systems requiring signal isolation
• Communication interfaces for noise immunity
• Power supply feedback loops
• Microcontroller input/output isolation

Procurement Notes

Verify the specific Current Transfer Ratio (CTR) bin required for your application, as the TCET1109G may be available in different CTR ranges. Confirm that the DIP-4 package configuration matches your PCB footprint. Ensure compliance with RoHS directives if applicable to your manufacturing standards. Cross-reference the datasheet for absolute maximum ratings to prevent component stress during operation.

Selection Notes

Select the TCET1109G when high isolation voltage and moderate speed are required for single-channel applications. Consider the NPN phototransistor output type for compatibility with standard logic levels. Evaluate the thermal management requirements given the 265 mW power dissipation limit. Compare against other TCET1100 series variants if specific CTR ranges or alternative packaging options are needed for the design.

Part Context

The TCET1109G belongs to the TCET1100 series of transistor output optocouplers from Vishay. This series is designed for general-purpose isolation applications where reliability and performance are critical. The component shares common characteristics with siblings like the TCET1108G and TCET1106G, differing primarily in their specified Current Transfer Ratio ranges. It serves as a robust solution for separating low-voltage control circuits from higher-voltage load circuits.

Replacement Considerations

Direct substitutes within the same family include the TCET1108G and TCET1106G, which share identical pinouts and mechanical dimensions but offer different CTR specifications. Verify that the alternative part's CTR range meets the circuit's gain requirements. Other Vishay optocouplers with similar DIP-4 packages and isolation voltages may also serve as functional replacements if electrical parameters align.