HX1178NLT

Overview

The HX1178NLT is a single-port LAN transformer module manufactured by Pulse Electronics, designed for 10/100Base-T applications. It features surface mount (SMD/SMT) termination and operates within a frequency range of 100 kHz to 100 MHz. The component provides an inductance of 350 uH and supports an insulation voltage of 1.5 kV. It functions across a temperature range from -40°C to +85°C. The physical dimensions are 25.4 mm in length, 12.83 mm in width, and 6.22 mm in height. The module is unshielded and complies with RoHS standards.

Feature Summary

• Provides electrical circuit isolation meeting IEEE 802.3 standards for signal integrity
• Optimized for compatibility with major LAN transceivers including Broadcom, Intel, and Micrel
• Supports peak reflow temperature ratings up to 245°C for robust surface mount assembly

Applications

• 10/100 Base-T network interface circuits
• Ethernet transceiver isolation interfaces
• LAN data interface modules requiring single-port connectivity

Procurement Notes

Verify the specific ordering suffix to confirm packaging type, as the NLT designation typically indicates tape and reel packaging, while NL may indicate tube packaging. Ensure compliance with moisture sensitivity level (MSL) handling procedures due to the component's humidity-sensitive classification. Confirm that the selected variant matches the required thermal and electrical specifications for the target application environment before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a single-port solution for 10/100 Mbps Ethernet connections. The HX1178NLT is suitable for applications demanding high isolation voltage and broad temperature operation. Consider the unshielded nature of the module when designing PCB layouts to manage electromagnetic interference. Verify transceiver compatibility with supported manufacturers such as Broadcom, Intel, and Micrel to ensure proper signal transmission performance.

Part Context

The HX1178NLT belongs to the HX series of LAN discrete transformer modules from Pulse Electronics. This series is engineered to provide reliable isolation between the PHY chip and the network cable. The module integrates common mode chokes and center-tapped transformers into a compact surface-mount package, simplifying the design process for Ethernet ports while maintaining signal quality and regulatory compliance.

Replacement Considerations

The HX1178NL is a direct equivalent part number differing primarily in packaging format rather than electrical function. Verify that any substitute maintains the same 1:1 turns ratio, 350 uH inductance, and 1.5 kV isolation voltage. Ensure the replacement component supports the same operating temperature range and physical footprint to guarantee mechanical fit and electrical performance parity.