TTC-218-2

Overview

The TTC-218-2 is a telecom modem transformer manufactured by Tamura. It features a 1:1 turns ratio with primary and secondary impedances of 600 Ohms. The device operates within a frequency range of 660 Hz to 3.5 kHz. Electrical characteristics include a primary DC resistance of 49 Ohms and a secondary DC resistance of 76 Ohms. It utilizes an eight-terminal configuration for connectivity. The component is designed for through-hole mounting on printed circuit boards, ensuring secure mechanical attachment in telecommunications equipment.

Feature Summary

• Provides galvanic isolation and impedance matching for modem signal transmission
• Supports standard telephone line interfacing with defined impedance characteristics
• Utilizes through-hole termination for robust PCB integration

Applications

• Telecommunications modem circuits
• Voice band signal processing
• Telephone interface modules

Procurement Notes

Verify the specific datasheet version to confirm terminal pinout and physical dimensions before integration. Ensure compatibility with existing PCB footprints and soldering profiles. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Validate electrical parameters against your system requirements prior to procurement.

Selection Notes

Select this component when designing circuits requiring 600 Ohm balanced-to-balanced transformation for voice frequencies. Consider the through-hole package type if surface-mount alternatives are unsuitable for your assembly process. Evaluate the DC resistance values to ensure they meet power loss constraints in your specific application. Verify that the operating frequency range aligns with your signal bandwidth requirements.

Part Context

This component belongs to Tamura's series of audio and signal transformers designed for telecommunications applications. These devices are engineered to handle analog voice signals efficiently. The product line focuses on reliability and performance in standard telephone network environments. Similar parts in the family may offer different impedance ratios or packaging options.

Replacement Considerations

Consult official substitution lists from Tamura for direct equivalents. Verify that any alternative transformer matches the 600 Ohm impedance specification and 1:1 ratio. Ensure physical footprint compatibility if replacing on existing boards. Check frequency response curves to maintain signal integrity.