CM1223 Datasheet, PDF (1/13 Pages) California Micro Devices Corp – Industry First Low Capacitance ESD Protection Arrays w/Backdrive Protection

CM1223
Industry First Low Capacitance ESD Protection Arrays w/Backdrive Protection
Features
• 2, 4, and 8 channels of ESD protection with inte-
grated backdrive protection on all lines
• Provides ESD protection to IEC61000-4-2 Level 4
- 8kV contact discharge
- 15kV air discharge
• Low channel input capacitance of 1.0pF typical
• Minimal capacitance change with temperature and
voltage
• Channel I/O to Gnd capacitance difference of
0.02pF typical is ideal for differential signalsl
• Mutual capacitance between signal pin and adja-
cent signal pin - 0.11pF typical
• Zener diode protects supply rail and eliminates the
need for external by-pass capacitors
• Pin compatible with CM1213-02, -04, and -08
• Each I/O pin can withstand over 1000 ESD strikes
• Available in SOT, and MSOP packages
• Lead-free version available
Applications
• USB2.0 ports at 480Mbps in desktop PCs, note-
books and peripherals
• IEEE1394 Firewire® ports at 400Mbps / 800Mbps
• DVI ports, HDMI ports in notebooks, set top boxes,
digital TVs, LCD displays
• UDI and Displayport
• Serial ATA ports in desktop PCs and hard disk
drives
• PCI Express ports
• General purpose high-speed data line ESD
protection
Product Description
The CM1223 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 neg-
ative ESD current pulse to either the positive (V_P) or
negative (V_N) supply rail. A Zener diode is embedded
between V_P and V_N, absorbing positive ESD strikes
and also providing ESD protection for the V_P rail. An
additional diode is added in this device to serve as
backdrive current protection. The CM1223 will protect
against ESD pulses up to ±8kV per the IEC 61000-4-2
standard and using the MIL-STD-883D (Method 3015)
specification for Human Body Model (HBM) ESD, all
pins are protected from contact discharges of greater
than ±15kV.
These devices are particularly well-suited for protecting
systems using high-speed ports such as USB2.0,
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 in a small package footprint.
The CM1223 family of devices is available with
optional lead-free finishing.
Electrical Schematics
V_P
CH4
V_P
CH3
CH8
CH7
V_P
CH6 CH5
CH1
CH2
V_N
CM1223-02ST/SO
CM1223-02SS/SR
CH1
V_N
CH2
CM1223-04ST/SO
CM1223-04MS/MR
CH1 CH2
V_N
CH3
CM1223-08MS/MR
CH4
© 2006 California Micro Devices Corp. All rights reserved.
08/02/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: [phone] ● Fax: [phone] ● www.cmd.com
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