Product Description

The CM1225 diode array has been designed to provide ESD protection for electronic components or subsystems requiring minimal capacitive loading. This device is ideal for protecting systems with high data and clock rates or for circuits requiring low capacitive loading. Each ESD channel consists of a pair of diodes in series which steer the positive or negative ESD current pulse to the ground pins (VN). A Zener diode is embedded between the positive terminal of the diode pair to the ground. This eliminates the need for an external bypass capacitor to absorb positive ESD strikes to ground. The CM1225 protects against ESD pulses up to ±8kV per the IEC 61000-4-2 standard.

Features

• Four channels of ESD protection

• Provides ESD protection to IEC61000-4-2 Level 4

• ±8kV contact discharge

• Low channel input capacitance of 0.8pF (typically)

• Channel input capacitance matching (I/O to I/O) of 0.02pF (typically) is ideal for differential signals

• Minimal capacitance change for temperature and voltage

• Zener diode eliminates the need for external bypass capacitors

• Each I/O pin can withstand over 1000 ESD strikes*

• Available in a RoHS compliant (lead-free) package

Applications

• HDMI ports, DVI ports in notebooks, set top boxes, digital TVs, and LCD displays

• Display and MDDI ports

• Serial ATA ports in desktop PCs and hard disk drives

• PCI Express ports

• USB2.0 ports at 480Mbps in desktop PCs, notebooks and peripherals

• IEEE1394 FireWire ports at 400Mbps / 800Mbps

• General purpose high-speed data line ESD protection

• Protection of interface ports or IC pins which are exposed to high ESD levels