CM1224 Datasheet PDF - ON Semiconductor


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CM1224
ON Semiconductor

Part Number CM1224
Description 2- and 4-Channel Low Capacitance ESD Protection Arrays
Page 14 Pages

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2- and 4-Channel Low Capacitance ESDwww.DataSheet4U.com
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 1.08
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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Package/Pinout Diagrams
CM1224www.DataSheet4U.com
Pin Configuration
2-CHANNEL, 4-LEAD SOT143-4 PACKAGE
PIN NAME TYPE DESCRIPTION
1 VN
2 CH1
GND
I/O
Negative voltage supply rail
ESD Channel
3 CH2
I/O ESD Channel
4 VP
PWR Positive voltage supply rail
4-CHANNEL, 6-LEAD SOT23-6 PACKAGES
PIN NAME TYPE DESCRIPTION
1 CH1
I/O ESD Channel
2 VN
3 CH2
4 CH3
5 VP
6 CH4
GND
I/O
I/O
PWR
I/O
Negative voltage supply rail
ESD Channel
ESD Channel
Positive voltage supply rail
ESD Channel
4-CHANNEL, 10-LEAD MSOP-10 PACKAGES
PIN NAME
TYPE DESCRIPTION
1 CH1
I/O ESD Channel
2 NC
No Connect
3 VP PWR Positive voltage supply rail
4 CH2
I/O ESD Channel
5 NC
No Connect
6 CH3
I/O ESD Channel
7 NC
No Connect
8
VN
GND
Negative voltage supply
rail
9 CH4
I/O ESD Channel
10 NC
No Connect
Rev. 3 | Page 2 of 14 | www.onsemi.com



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CM1224
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Ordering Information
PART NUMBERING INFORMATION
# of Channels
2
4
4
Leads
4
6
10
Package
SOT143-4
SOT23-6
MSOP-10
Lead-free Finish
Ordering Part Number1
Part Marking
CM1224-02SR
L242
CM1224-04SO
L244
CM1224-04MR
L243
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Specifications
PARAMETER
Operating Supply Voltage (VP - VN)
Operating Temperature Range
Storage Temperature Range
DC Voltage at any channel input
ABSOLUTE MAXIMUM RATINGS
RATING
6.0
–40 to +85
–65 to +150
(VN - 0.5) to (VP + 0.5)
UNITS
V
°C
°C
V
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature Range
Package Power Rating
SOT23-3, SOT143-4,SOT23-5 and SOT23-6 Packages
MSOP-10 Package
RATING
–40 to +85
225
400
UNITS
°C
mW
mW
Rev. 3 | Page 3 of 14 | www.onsemi.com



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CM1224www.DataSheet4U.com
ELECTRICAL OPERATING CHARACTERISTICS(SEE NOTE 1)
SYMBOL PARAMETER
VP Operating Supply Voltage (VP-VN)
IP Operating Supply Current
VF Diode Forward Voltage
Top Diode
Bottom Diode
ILEAK Channel Leakage Current
CIN Channel Input Capacitance
CIN
VESD
VCL
Channel Input Capacitance Matching
ESD Protection - Peak Discharge Voltage at
any channel input, in system
Contact discharge per IEC 61000-4-2
standard
Channel Clamp Voltage
Positive Transients
Negative Transients
CONDITIONS
(VP-VN)=3.3V
IF = 8mA; TA=25°C
TA=25°C; VP=5V, VN=0V
At 1 MHz, VP=3.3V, VN=0V,
VIN=1.65V
At 1 MHz, VP=3.3V, VN=0V,
VIN=1.65V
Notes 2 and 3; TA=25°C
TA=25°C, IPP = 1A,
tP = 8/20µS; Note 3
MIN TYP MAX UNITS
3.3 5.5
V
8.0 µA
0.60
0.60
0.60
0.80
0.80
±0.1
0.70
0.95
0.95
±1.0
0.80
V
V
µA
pF
0.02 pF
±8
+10.0
–1.8
kV
V
V
V
RDYN Dynamic Resistance
Positive Transients
Negative Transients
IPP = 1A, tP = 8/20µS
Any I/O pin to Ground;
Note 3
1.08
0.66
Note 1: All parameters specified at TA = –40°C to +85°C unless otherwise noted.
Note 2: Standard IEC 61000-4-2 with CDischarge = 150pF, RDischarge = 330, VP = 3.3V, VN grounded.
Note 3: These measurements performed with no external capacitor on VP (VP floating).
Rev. 3 | Page 4 of 14 | www.onsemi.com




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