CM1224-04MR(2010) データシートの表示（PDF） - ON Semiconductor

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CM1224-04MR
(Rev.:2010)

2- and 4-Channel Low Capacitance ESD Protection Arrays

ON Semiconductor 

2- and 4-Channel Low Capacitance ESD

Protection Arrays

CM1224

Features

• Two or four 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

Applications

• USB 2.0 ports at 480Mbps in desktop PCs, notebooks

and peripherals

• IEEE1394 Firewire® ports at 400Mbps / 800Mbps

• 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

Block Diagram

Product Description

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.

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, 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.

©2010 SCILLC. All rights reserved.

April 2010 – Rev. 3

Publication Order Number:

CM1224/D

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