CM1224
2 and 4-Channel
Low Capacitance
ESD Protection Arrays
Product Description
The CM1224 family of diode arrays has been designed to provide
ESD protection for electronic components or subsystems 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 (V
P
) or negative (V
N
) supply rail. A Zener diode is
embedded between V
P
and V
N
, offering two advantages. First, it
protects the V
CC
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 will protect
against ESD pulses up to
±8
kV 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
®
,
iLinkt), 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.
The CM1224 family of devices has lead−free finishing in a small
package footprint.
Features
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SOT−143
SR SUFFIX
CASE 318A
SOT23−6
SO SUFFIX
CASE 527AJ
MSOP 10
MR SUFFIX
CASE 846AE
BLOCK DIAGRAM
V
P
CH1
CH2
CH4
V
P
CH3
V
N
CM1224−02SR
CH1
V
N
CH2
CM1224−04SO
CM1224−04MR
MARKING DIAGRAM
•
Two or Four Channels of ESD Protection
•
Provides ESD Protection to IEC61000−4−2 Level 4
•
•
•
•
•
•
•
•
•
L242 MG
G
1
SOT143−4
L244 MG
G
SOT23−6
L243 MG
G
±8
kV Contact Discharge
Low Channel Input Capacitance of 0.7 pF Typical
Minimal Capacitance Change with Temperature and Voltage
Channel Input Capacitance Matching of 0.02 pF Typical is Ideal for
Differential Dignals
Zener Diode Protects Supply Rail and Eliminates the Need for
External By−pass Capacitors
Low Clamping Voltage (V
CLAMP
) at 10 V
Low Dynamic Resistance (R
DYN
) at 1.08
W
Each I/O Pin Can Withstand Over 1000 ESD Strikes
Available in SOT and MSOP Lead−free Packages
These Devices are Pb−Free and are RoHS Compliant
MSOP−10
L24x
= Specific Device Code
M
= Date Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
CM1224−02SR
CM1224−04SO
CM1224−04MR
Package
SOT143−4
(Pb−Free)
SOT23−6
(Pb−Free)
MSOP−10
(Pb−Free)
Shipping
3000/Tape & Reel
3000/Tape & Reel
4000/Tape & Reel
Applications
•
USB2.0 Ports at 480 Mbps in desktop PCs, Notebooks and Peripherals
•
IEEE1394 Firewire
®
Ports at 400 Mbps / 800 Mbps
•
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
©
Semiconductor Components Industries, LLC, 2012
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
•
General Purpose High−speed Data Line ESD Protection
1
Publication Order Number:
CM1224/D
July, 2012
−
Rev. 5
CM1224
Table 1. PIN DESCRIPTIONS
2−Channel, 4−Lead SOT143−4 Package
Pin
1
2
3
4
Name
V
N
CH1
CH2
V
P
Type
GND
I/O
I/O
PWR
Description
Negative voltage supply rail
ESD Channel
ESD Channel
Positive voltage supply rail
CH1
2
PACKAGE / PINOUT DIAGRAMS
Top View
V
N
1
4
V
P
4−Lead SOT143−4
L242
3
CH2
4−Channel, 6−Lead SOT23−6 Packages
Pin
1
2
3
4
5
6
Name
CH1
V
N
CH2
CH3
V
P
CH4
Type
I/O
GND
I/O
I/O
PWR
I/O
Description
ESD Channel
Negative voltage supply rail
ESD Channel
ESD Channel
Positive voltage supply rail
ESD Channel
6−Lead SOT23−6
CH1
V
N
CH2
Top View
1
6
CH4
V
P
CH3
L244
2
3
5
4
4−Channel, 10−Lead MSOP−10 Packages
Pin
1
2
3
4
5
6
7
8
9
10
Name
CH1
NC
V
P
CH2
NC
CH3
NC
V
N
CH4
NC
GND
I/O
I/O
PWR
I/O
Type
I/O
Description
ESD Channel
No Connect
Positive voltage supply rail
ESD Channel
No Connect
ESD Channel
No Connect
Negative voltage supply rail
ESD Channel
No Connect
CH1
NC
V
P
CH2
NC
Top View
1
2
3
4
5
10
9
8
7
6
NC
CH4
V
N
NC
CH3
10−Lead MSOP−10
L243
SPECIFICATIONS
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
Operating Supply Voltage (V
P
−
V
N
)
Operating Temperature Range
Storage Temperature Range
DC Voltage at any Channel Input
Rating
6.0
–40 to +85
–65 to +150
(V
N
−
0.5) to (V
P
+ 0.5)
Units
V
°C
°C
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
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2
CM1224
Table 3. 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
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Note1)
Symbol
V
P
I
P
V
F
Parameter
Operating Supply Voltage (V
P
−V
N
)
Operating Supply Current
Diode Forward Voltage
Top Diode
Bottom Diode
Channel Leakage Current
Channel Input Capacitance
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
Dynamic Resistance
Positive Transients
Negative Transients
(V
P
−V
N
) = 3.3 V
I
F
= 8 mA; T
A
= 25°C
0.6
0.6
0.8
0.8
±0.1
0.6
0.7
0.02
Conditions
Min
Typ
3.3
Max
5.5
8.0
0.95
0.95
±1.0
0.8
Units
V
mA
V
I
LEAK
C
IN
DC
IN
V
ESD
T
A
= 25°C; V
P
= 5 V, V
N
= 0 V
At 1 MHz, V
P
= 3.3 V, V
N
= 0 V, V
IN
= 1.65 V
At 1 MHz, V
P
= 3.3 V, V
N
= 0 V, V
IN
= 1.65 V
mA
pF
pF
kV
T
A
= 25°C (Notes 2 and 3)
T
A
= 25°C, I
PP
= 1A,
t
P
= 8/20
mS;
(Note 3)
I
PP
= 1A, t
P
= 8/20
mS
Any I/O pin to Ground;
(Note 3)
±8
+10
–1.8
1.08
0.66
V
V
CL
R
DYN
W
1. All parameters specified at T
A
= –40°C to +85°C unless otherwise noted.
2. Standard IEC 61000−4−2 with C
Discharge
= 150 pF, R
Discharge
= 330
W,
V
P
= 3.3 V, V
N
grounded.
3. These measurements performed with no external capacitor on V
P
(V
P
floating).
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3
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