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
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.
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
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
CH1
CH2
V
N
CH3
CH4
CM1223-04ST/SO
CM1223-04MS/MR
CM1223-08MS/MR
© 2006 California Micro Devices Corp. All rights reserved.
08/02/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
1
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
