TX1287T

Overview

The TX1287T is a surface-mount telecommunications transformer manufactured by Pulse Electronics. It features a dual-port configuration with a primary-to-secondary turns ratio of 1CT:2.42CT for both transmitter and receiver channels. The component exhibits a primary DC resistance (DCR) of 0.7 Ohms per winding. It utilizes a gull-wing SMD package with 16 terminals, designed for integration into ISDN-PRI and T1/CEPT communication systems.

Feature Summary

• Dual-channel architecture supporting simultaneous transmitter and receiver signal paths
• Optimized for digital telephony standards including T1, CEPT, and ISDN-Primary Rate Interface
• Surface-mount construction with gull-wing leads for automated PCB assembly

Applications

• ISDN-Primary Rate Interface (PRI) terminal equipment
• T1 line interface circuits
• CEPT standard communication hardware
• Digital subscriber line network interfaces

Procurement Notes

Verify the specific datasheet revision to confirm pinout compatibility with existing board layouts. Ensure the gull-wing footprint dimensions match the target PCB design. Confirm that the 0.7 Ohm DCR specification aligns with the system's power budget requirements. Validate that the component meets the necessary regional regulatory standards for telecommunications equipment deployment.

Selection Notes

Select this component when designing for T1 or ISDN-PRI applications requiring balanced signal transmission. The 1CT:2.42CT ratio is critical for impedance matching in these specific telephony protocols. Consider the 16-terminal gull-wing package for high-density surface-mount assembly processes. Evaluate the thermal performance within the intended operating environment to ensure long-term reliability.

Part Context

This transformer belongs to Pulse Electronics' portfolio of audio and signal transformers tailored for telecom infrastructure. It serves as a key isolation and impedance-matching element in digital voice transmission networks. The device supports the transition from analog to digital signaling in legacy and modern telephony systems.

Replacement Considerations

Consult official substitution guides for equivalent models with identical 1CT:2.42CT ratios and 16-terminal gull-wing packages. Verify that any alternative part maintains the same 0.7 Ohm DCR and fits the T1/CEPT/ISDN-PRI application profile without modifying the circuit layout.