The T1136NL is a surface mount common mode choke designed and manufactured by Pulse Electronics (formerly Pulse A Technitrol Company). It is engineered to suppress common mode noise in various electronic circuits, particularly in applications where noise reduction and signal integrity are crucial.

Applications

• USB interfaces
• CAN bus systems
• Ethernet interfaces
• Power lines
• Signal lines where common mode noise is present

Features

• Surface Mount Device (SMD) for easy PCB assembly
• High common mode impedance
• Low differential mode impedance
• Compact size
• Excellent common mode noise suppression

Benefits

• Effective common mode noise filtering, preventing interference and ensuring signal integrity.
• Improved system reliability by reducing the impact of noise on sensitive circuits.
• Space-saving design due to its compact SMD form factor, allowing for higher component density on the PCB.
• Simplified manufacturing process with easy pick-and-place assembly.
• Enhanced electromagnetic compatibility (EMC) performance of the overall system.

Technical Specifications

The T1136NL common mode choke typically has an inductance value around 1.4 mH per winding. Its common mode impedance is high, providing effective attenuation of common mode noise signals, while the differential mode impedance is low to minimize signal distortion. It is designed for surface mount assembly and comes in a compact package, typically around 4.5mm x 3.2mm x 3.0mm. The operating temperature range is typically from -40°C to +85°C. The specific impedance characteristics vary depending on the frequency; typically, it offers significant attenuation in the MHz range, which is critical for addressing common mode noise in high-speed data communication circuits.

The primary function of the T1136NL is to attenuate common mode noise without affecting the differential signals. Common mode noise refers to unwanted signals that are present equally on both signal lines and can interfere with data transmission. By utilizing its high common mode impedance, the choke effectively blocks these noise signals, preventing them from propagating through the circuit. Conversely, the low differential mode impedance ensures that the desired differential signals pass through with minimal attenuation. This balance is essential for maintaining signal integrity and ensuring reliable communication.