HX1188NL LAN Transformer Surface Mounted 10/100 Base-T Ethernet 16 Pins

HX1188NL 100Base-TX Transformers Features:

1. Fully compliant with RoHS-6 standards.
2. Designed with an open frame to improve thermal management.
3. Surface Mount Technology allows for easy integration.
4. 1.5 kV High Isolation Voltage ensures safety and reliability in data transmission.
5. -40°C to +85°C Wide Operating Temperature Range.
6. Features 350 µH high inductance support stable data transmission.
7. 12.7x9.53x5.97 mm compact dimensions.
8. Can be stored in temperatures ranging from -50°C to +125°C.

Applications of HX1188NL LAN Transformer:

• LAN Ethernet Transformer/Choke
• 100 Base-TX Networks
• Data Interface and Isolation
• Industrial and Commercial Environments
• Networking Equipment
• Telecommunications
• Embedded Systems
• Automation Systems
• Security Systems

HX1188NL Datasheet:

Pulse HX1188NL Electrical Specifications(@25℃):

1. Turns Ratio 50KHz, 0.5V Chip side: Line side=1CT: 1CT±2%

2. Inductance(Ls)100KHz, 0.1V, 12mA DC Bias: Chip side: 350uH Min

3. Insertion Loss1-100MHz: -1.4dB Max

4. Return Loss1-30MHz: -16dB Min

40MHz: -14.4dB Min

50MHz: -13.1dB Min

60-80MHz: -12dB Min

100MHz: -10dB Min

5. Differential to Common Mode Rejection:

30MHz: -45dB Min

60MHz: -40dB Min

100MHz: -35dB Min

6. Crosstalk30MHz: -40dB Min

60MHz: -35dB Min

100MHz: -30dB Min

7. Hi-Pot: 1500Vrms Min

FAQs for PULSE HX1188NL

1. What is the HX1188NL LAN transformer?

The HX1188NL is a dual-port 10/100Base-T Ethernet LAN transformer designed to provide signal isolation, impedance matching, and noise suppression between a PHY chip and the network cable. It is commonly used in Fast Ethernet applications and supports standard IEEE 802.3 requirements for reliable data transmission.

2. What are the key specifications of HX1188NL?

The HX1188NL typically features a 1:1 turns ratio for both transmit and receive channels, an inductance of around 350 µH, and an isolation voltage of approximately 1500 Vrms. It is designed for 10/100Base-T Ethernet and comes in a compact surface-mount package suitable for PCB integration.

3. What data rate does HX1188NL support?

HX1188NL supports 10Base-T and 100Base-TX Ethernet data rates, making it suitable for Fast Ethernet applications. It does not support Gigabit Ethernet (1000Base-T), as its bandwidth and electrical characteristics are not designed for higher-speed signaling requirements.

4. Is HX1188NL compatible with Gigabit Ethernet?

No, HX1188NL is not compatible with Gigabit Ethernet because it is specifically designed for 10/100Base-T applications. Gigabit Ethernet requires different magnetics with higher bandwidth and stricter performance characteristics, so a dedicated 1000Base-T transformer should be used instead.

5. What is the turns ratio of HX1188NL?

The HX1188NL typically has a 1:1 turns ratio for both transmit and receive channels, which ensures proper impedance matching between the Ethernet PHY and the twisted-pair cable. This ratio is standard for most 10/100Base-T LAN transformer designs.

6. What is the isolation voltage of HX1188NL?

HX1188NL provides an isolation voltage of approximately 1500 Vrms, which helps protect Ethernet devices from electrical surges and ground potential differences. This isolation is essential for meeting safety and reliability requirements in network equipment.

7. Which PHY chips are compatible with HX1188NL?

HX1188NL is typically compatible with 10/100Base-T Ethernet PHY chips such as Microchip LAN8720, TI DP83848, and similar Fast Ethernet transceivers. However, designers should always verify compatibility with the PHY manufacturer’s reference design to ensure optimal performance.

8. What is the equivalent or replacement for HX1188NL?

A common replacement for HX1188NL is the LP1188NL, which offers similar electrical characteristics, including 1:1 turns ratio and 10/100Base-T support. When selecting an equivalent, engineers should verify key parameters such as inductance, insertion loss, and isolation voltage.

9. How is HX1188NL used in Ethernet circuit design?

HX1188NL is used between the Ethernet PHY and the RJ45 connector to provide isolation and signal conditioning. It is typically placed close to the PHY on the PCB, with proper center-tap biasing and controlled impedance routing to ensure signal integrity and EMI compliance.

10. What is the difference between HX1188NL and RJ45 with integrated magnetics?

HX1188NL is a discrete LAN transformer used on the PCB, while an RJ45 connector with integrated magnetics (MagJack) combines the transformer and connector into a single component. Discrete solutions offer more design flexibility, while integrated solutions simplify layout and assembly.