CM1225 Datasheet, PDF (1/11 Pages) ON Semiconductor – 4-Channel Low Capacitance ESD Protection Arrays

4-Channel Low Capacitance ESD
Protection Arrays
CM1225
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
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 (V_N). 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.
The CM1225 is particularly well-suited for protecting
systems using high-speed ports such as HDMI, DVI,
display, MDDI, USB 2.0, Serial ATA, IEEE1394
(FireWire and i.LINK), corresponding ports in removable
storage, digital camcorders, DVD-RW drives and other
applications where extremely low loading capacitance
with ESD protection are required in a small package
footprint.
The CM1225 is available in a RoHS-compliant, uUDFN
10-pin package.
*Standard test condition is IEC61000-4-2 level 4 test circuit with each pin subjected to ±8kV contact discharge for 1000 pulses. Discharges are timed at 1 second intervals and all 1000 strikes are completed in one
continuous test run. The part is then subjected to standard production test to verify that all of the tested parameters are within spec after the 1000 strikes.
©2010 SCILLC. All rights reserved.
April 2010 – Rev. 2
Publication Order Number:
CM1225/D