TVS Diode Array from Littelfuse Reduces Clamping Voltage up to 35% to Protect Cutting-Edge Telecommunications Chipsets

This robust device can safely absorb 20A of current (tP=8/20μs) without performance degradation and a minimum of ±30kV ESD protection. Furthermore, the low loading capacitance makes it ideal for protecting high-speed signal pins such as 1Gb Ethernet data lines.

The SP3051-04HTG offers a variety of advantages over similar devices from other manufacturers. For example, because it has lower dynamic resistance (0.3Ω) than competitive devices, the SP3051-04HTG can offer a substantially lower clamping voltage (just 10.5V vs. as high as 16.6V from other devices). It also has a much higher contact discharge ESD contact rating (30kV vs. 8kV to 20kV) than devices from other suppliers.

Typical applications of the SP3051-04HTG TVS Diode Array include protection of 10/100/1000 Ethernet (PHY side), T1/E1/T3/E3 (PHY side), USB 2.0 and FireWire ports. These ports can be found in a wide range of equipment such as switches, gateways, pico/femtocells, LCD/PDP TVs, set-top boxes, notebooks/ultrabooks, diagnostic/medical equipment and monitors/flat panel displays.

“As IC process geometries continue to shrink Ethernet transceivers, and other high-speed buses, become more susceptible to damage due to lightning-induced transients or ESD and require a low clamping, robust, low capacitance device like the SP3051-04HTG to protect them,” said Chad Marak, product line director for TVS diode arrays. “The proliferation of Ethernet and IP communications makes this an ideal circuit protection solution for a growing list of market segments such as telecom/datacom, computing, industrial, consumer, medical and many others.”

SP3051-04HTG TVS Diode Arrays offer these key features and benefits:

Features
• Extremely low dynamic resistance (RDYN) of 0.3Ω
• Low capacitance from I/O to GND (3.8pF @ 0V DC bias, 1.7pF @ VCC=5V, VI/O=2.5V)
• Robust surge protection (Lightning, IEC61000-4-5, 20A (8/20µs); Peak pulse power, 400W (8/20µs))
• Enhanced ESD capability (IEC61000-4-2, ±30kV contact, ±30kV air)

Benefits
• Reduces clamping voltages up to 35 percent compared to competition; better able to protect modern ICs against industry-defined transients such as the IEC61000-4-5
• Capacitance up to 15 percent lower than similar market solutions; helps to preserve signal integrity by minimizing data loss in long (e.g., 100m) installations of 1Gb Ethernet
• High power and surge handling capability offers more design margin to electrical threats defined by industry standards as well as Cable Discharge Events (CDE)
• Enhanced ESD protection far exceeds the highest level of the IEC61000-4-2 standard (±8kV), ensuring maximum reliability of end products in the field