CM1224

• 2 or 4 channels of ESD protection
• Provides ESD protection to IEC61000-4-2
  Level 4
  
  • ±8kV contact discharge
• Low channel input capacitance of 0.7pF typical
• Minimal capacitance change with temperature and voltage
• Channel input capacitance matching of 0.02pF typical is ideal for differential signals
• Zener diode protects supply rail and eliminates the need for external by-pass capacitors
• Low clamping voltage (VCLAMP) at 10V
• Low Dynamic resistance (RDYN) at 1.08Ω
• Each I/O pin can withstand over 1000 ESD strikes*
• Available in SOT and MSOP lead-free packages

The CM1224 family of diode arrays has been designed to provide ESD protection for electronic components or sub-systems 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 protects against ESD pulses up to ±8kV per the IEC 61000-4-2 standard.

CM1224 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, as well as 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.