IAA110P

Telecom Overview

The IAA110P is a multifunction telecom switch integrating two 350V Form-A relays and one optocoupler in a 16-pin SOIC package. It utilizes OptoMOS architecture for 3750Vrms input-to-output isolation. Key electrical parameters include a blocking voltage of 350V, continuous load current of 100mA rms/mADC, and maximum on-resistance of 35Ω. Switching speeds are typically 3ms for both turn-on and turn-off. The phototransistor detector offers a collector-emitter breakdown voltage of 50V and a typical current transfer ratio of 33%. Operational temperature ranges from -40°C to +85°C.

Telecom Feature Summary

• Combines three discrete functions (two relays and one detector) into a single compact component
• Provides high-voltage isolation between control inputs and switched outputs
• Supports bidirectional current sensing and switching capabilities
• Generates no electromagnetic or radio frequency interference during operation

Telecom Applications

• Telecommunications and telecom switching systems
• Tip/Ring circuits and modem switching for portable devices
• Hook switch and dial pulsing applications
• Ringing injection and ground start circuits
• Medical equipment patient/equipment isolation

Telecom Procurement Notes

Verify the specific ordering suffix when purchasing. The IAA110P designation refers to the tube version containing 50 units per tube. The IAA110PTR variant indicates the tape and reel packaging with 1000 units per reel. Confirm the required packaging format matches the production assembly needs before placing orders to ensure correct component handling and storage conditions.

Telecom Selection Notes

Select this component for designs requiring space-saving integration of multiple switching functions. Ensure the circuit load does not exceed the 100mA continuous rating or 350V peak blocking voltage. Verify that the 3750Vrms isolation requirement is met for safety standards. Consider the 16-pin SOIC footprint for PCB layout constraints and confirm compatibility with wave soldering or reflow processes as specified in manufacturing guidelines.

Telecom Part Context

The IAA110P belongs to the integrated telecom circuits family produced by Littelfuse's IXYS Integrated Circuits Division. It replaces traditional discrete relay and optocoupler assemblies, reducing board space and assembly complexity. The device leverages patented OptoMOS technology to provide reliable solid-state switching with optical isolation, suitable for harsh industrial and telecommunications environments.

Telecom Replacement Considerations

The IAA110PTR serves as the direct tape-and-reel equivalent of the IAA110P tube version. Both share identical electrical characteristics and pin configurations. No other cross-model substitutes are documented in the official datasheet. Designers should verify pinout compatibility if considering alternative multifunction switches from other manufacturers.