TTC-13

Overview

The Tamura TTC-13 is a telecommunications audio transformer designed for signal coupling applications. It features a primary impedance of 4000 Ohms and a secondary impedance of 600 Ohms, providing an appropriate interface for modem and line circuit integration. The component supports a maximum direct current of 0 mA, ensuring isolation without DC path continuity. Manufactured by Tamura under the TTC series, this device utilizes a DIP-4P package with dimensions of 20.3x16.5mm, suitable for through-hole mounting on printed circuit boards.

Feature Summary

• Provides galvanic isolation between primary and secondary circuits in telecommunication systems
• Designed specifically for audio and signal transformer applications within modem architectures
• Utilizes a standard DIP-4P surface mount or through-hole compatible package format

Applications

• Modem signal coupling circuits
• Telecommunications line interface modules
• Audio signal transmission systems

Procurement Notes

Verify the specific manufacturing date code and RoHS compliance status prior to procurement, as historical data indicates variations in environmental compliance across different production batches. Confirm that the DIP-4P footprint matches the target PCB design requirements. Ensure the supplier provides official documentation confirming the 4000:600 Ohm impedance ratio and zero milliampere DC rating to guarantee functional compatibility with the intended telecommunication equipment.

Selection Notes

Select the TTC-13 when a high-impedance primary side (4000 Ohms) coupled to a standard 600 Ohm secondary line is required for audio signal transfer. This component is appropriate for designs necessitating strict DC isolation with a maximum of 0 mA DC current capability. Consider the physical dimensions of the 20.3x16.5mm DIP-4P package during layout planning to ensure adequate clearance and mechanical stability within the assembly.

Part Context

The TTC-13 belongs to Tamura's broader portfolio of audio and signal transformers, specifically categorized under telecommunications components. It serves as a specialized variant within the TTC series, distinguished by its unique 4000:600 Ohm impedance transformation ratio. This positioning allows it to bridge high-impedance source circuits with standard telephony lines, fulfilling a niche role in legacy and modern modem hardware architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers should consult Tamura technical support for validated cross-reference options that match the specific 4000:600 Ohm impedance and DIP-4P form factor requirements.