TS117STR

Telecom Overview

The TS117STR is a multifunction telecom switch integrating a normally open (Form-A) relay and a phototransistor detector in an 8-pin surface-mount package. It utilizes OptoMOS architecture with an infrared LED for optical coupling, providing 3750 Vrms input-to-output isolation. The relay section supports a blocking voltage of 350 Vp, continuous load current up to 120 mA rms/mADC, and a maximum on-resistance of 35 Ω. The integrated detector offers a minimum current transfer ratio of 33% at 6 mA forward current. Designed for low drive power requirements compatible with TTL/CMOS logic, the device operates within a temperature range of -40°C to +85°C.

Telecom Feature Summary

• Combines a single-pole normally open relay and a phototransistor detector in one component
• Provides high-voltage isolation between control inputs and load circuits
• Operates without mechanical moving parts or arcing
• Compatible with standard digital logic families for direct driving

Telecom Applications

• Telecommunications switching and tip/ring circuits
• Modem switching for portable computing devices
• Medical equipment patient and equipment isolation
• Instrumentation and data acquisition multiplexers
• Security systems and industrial controls

Telecom Procurement Notes

Verify the specific ordering suffix 'STR' corresponds to the tape and reel packaging format containing 1000 units per reel. Confirm that the component meets the required moisture sensitivity level and electrostatic discharge handling protocols during storage and assembly processes.

Telecom Selection Notes

Select this component when space constraints require combining switching and detection functions. Ensure the application load voltage does not exceed the 350 Vp blocking rating. Verify that the circuit design accommodates the specified turn-on and turn-off times for the intended signal frequency.

Telecom Part Context

This device belongs to the TS117 series of multifunction telecom switches manufactured by IXYS Integrated Circuits Division. The series includes variants such as the TS117S for tube packaging and the TS117PTR flatpack version. All variants share identical electrical characteristics and pin configurations.

Telecom Replacement Considerations

Direct replacements must match the 8-pin SMD footprint and provide equivalent 3750 Vrms isolation. Verify that substitute components support the same 350 Vp blocking voltage and 120 mA continuous load current ratings.

Telecom FAQ

What is the maximum isolation voltage between the input and output?

The TS117STR provides an isolation voltage of 3750 Vrms between the input and output.

Does the device generate electromagnetic interference?

No, the device generates no EMI/RFI due to its solid-state optically coupled design.

What is the typical turn-on time for the relay section?

The typical turn-on time is 3 ms under standard test conditions.