The PJF5KB942M5B4EB-Z is a common mode choke from Taiyo Yuden, designed to suppress common mode noise in high-speed differential signal lines. It's commonly used in various electronic devices to improve signal integrity and reduce electromagnetic interference (EMI).

Applications:

• USB 2.0/3.0/3.1 data lines
• HDMI interfaces
• DisplayPort interfaces
• LVDS interfaces
• CAN bus
• Ethernet interfaces

Features:

• Impedance: 90 Ohms at 100MHz (typical)
• Rated Current: 500mA
• DC Resistance (DCR): 0.3 Ohms (typical)
• Operating Temperature Range: -40°C to +85°C
• Size: 3.2mm x 1.6mm x 1.15mm (1206 size)
• High common mode attenuation: Effectively suppresses common mode noise.
• Low differential mode distortion: Minimizes signal degradation.

Benefits:

• Reduced EMI: Suppresses common mode noise, preventing interference with other devices.
• Improved signal integrity: Minimizes signal degradation and ensures reliable data transmission.
• Compact size: Saves space on the PCB.
• Wide operating temperature range: Suitable for use in various environments.
• RoHS compliant: Environmentally friendly.

Additional Details:

The PJF5KB942M5B4EB-Z common mode choke is designed to attenuate common mode noise while minimally affecting the differential signal. It achieves this by presenting a high impedance to common mode currents and a low impedance to differential mode currents. The device is constructed using a ferrite core and wound with two identical coils. The coils are wound in opposite directions so that the magnetic fields generated by the differential signal cancel each other out, minimizing distortion. The choke is surface mountable and is available in a compact 1206 size. It is typically placed near the connector of the interface to filter out noise entering or leaving the device. Proper PCB layout is crucial for optimal performance. The choke should be placed close to the signal lines and connected with short traces to minimize parasitic inductance. Ground planes should be used to provide a low-impedance return path for the common mode currents.

The letter 'Z' at the end of the part number may denote a specific packaging option or RoHS compliance status.