CM1224-04SO

The CM1224 family of diode arrays has been designed to provide ESD protection for electronic components or subsystems requiring minimal capacitive loading. These devices are 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 either the positive (Vₚ) or negative (Vₙ) supply rail. A Zener diode is embedded between Vₚ and Vₙ, offering two advantages. First, it protects the VCC rail against ESD strikes, and second, it eliminates the need for a bypass capacitor that would otherwise be needed for absorbing positive ESD strikes to ground. The CM1224 will protect against ESD pulses up to ±8 kV per the IEC 61000−4−2 standard. These devices are particularly well−suited for protecting systems using high−speed ports such as USB 2.0, IEEE1394 (Firewire, iLink), Serial ATA, DVI, HDMI and corresponding ports in removable storage, digital camcorders, DVD−RW drives and other applications where extremely low loading capacitance with ESD protection are required. The CM1224 family of devices has lead−free finishing in a small package footprint.

Applications

• USB2.0 Ports at 480 Mbps in desktop PCs, Notebooks and Peripherals
• IEEE1394 Firewire Ports at 400 Mbps / 800 Mbps
• DVI Ports, HDMI Ports in Notebooks, Set Top Boxes, Digital TVs, LCD Displays
• Serial ATA Ports in Desktop PCs and Hard Disk Drives
• PCI Express Ports
• General Purpose High−speed Data Line ESD Protection

Key features

• Two or Four Channels of ESD Protection
• Provides ESD Protection to IEC61000−4−2 Level 4 ±8 kV Contact Discharge
• Low Channel Input Capacitance of 0.7 pF Typical
• Minimal Capacitance Change with Temperature and Voltage Channel Input Capacitance Matching of 0.02 pF Typical is Ideal for Differential Dignals
• Zener Diode Protects Supply Rail and Eliminates the Need for External By−pass Capacitors
• Low Clamping Voltage (VCLAMP) at 10 V
• Low Dynamic Resistance (R_DYN) at 1.08 Ω
• Each I/O Pin Can Withstand Over 1000 ESD Strikes
• Available in SOT and MSOP Lead−free Packages
• These Devices are Pb−Free and are RoHS Compliant