TCMT1109

Overview

The TCMT1109 is a single-channel phototransistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates a gallium arsenide infrared-emitting diode optically coupled to a phototransistor within a compact SSOP-4 package. Key electrical specifications include a maximum current transfer ratio of 400% at 5mA and a reverse voltage rating of 6V. The device supports a power dissipation of 250mW and operates reliably across an extended temperature range from -40°C to +100°C, ensuring stable performance in various industrial applications.

Feature Summary

• Integrates a gallium arsenide infrared-emitting diode with a phototransistor for optical signal transmission
• Provides high isolation capability with a rated breakdown voltage of 3750Vrms between input and output circuits
• Designed for fast switching performance with typical rise and fall times under 10 microseconds

Applications

• Industrial process control systems requiring galvanic isolation
• Signal transmission in microprocessor-based logic circuits
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific ordering suffix to confirm the exact package variant and tape-and-reel quantity, as these details define the physical form factor and shipping configuration. Ensure the component matches the required operating temperature range and isolation voltage ratings for your specific circuit design before finalizing procurement orders.

Selection Notes

Select this component when a single-channel transistor output is required for digital signal isolation. Consider the 400% maximum current transfer ratio and low propagation delay for high-speed logic interfacing. Verify that the SSOP-4 footprint fits the PCB layout constraints and that the 6V reverse voltage rating meets the collector-emitter requirements of the load circuit.

Part Context

This part belongs to the TCMT110 series of photovoltaic and transistor output optoisolators. These devices are engineered for general-purpose isolation tasks where compact size and reliable electrical separation are critical. The series offers multiple channel configurations, with the TCMT1109 specifically providing a single-channel solution in a surface-mount package suitable for automated assembly processes.

Replacement Considerations

Direct substitutes may include other single-channel transistor output optocouplers in SSOP-4 packages with comparable CTR and isolation ratings. Verify pinout compatibility and thermal characteristics before substitution.