2004 California Micro Devices Corp. All rights reserved.
12/22/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
1
CM1218
Low Capacitance Transient Voltage
Suppressors / ESD Protectors
Features
Low I/O capacitance at 7pF typical
In-system ESD protection to
15kV contact
discharge, per the IEC 61000-4-2 international
standard
Two, three, four or five channels of ESD protection
Compact SMT package saves board space and
facilitates layout in space-critical applications
Each I/O pin can withstand over 1000 ESD strikes
Lead-free versions available
Applications
High-speed consumer electronic ports
ESD protection of PC ports, including USB ports,
serial ports, parallel ports, IEEE1394 ports,
docking ports, proprietary ports, etc.
Protection of interface ports or IC pins which are
exposed to high ESD levels
Product Description
The CM1218 family of devices features transient volt-
age suppressor arrays that provide a very high level of
protection for sensitive electronic components which
may be subjected to electrostatic discharge (ESD).
All pins of the CM1218 are rated to withstand
15kV
ESD pulses using the IEC 61000-4-2 contact dis-
charge method. Using the MIL-STD-883D (Method
3015) specification for Human Body Model (HBM)
ESD, all pins are protected from contact discharges of
greater than
30kV.
The CM1218 is supplied in a number of compact, sur-
face mount packages depending on the channel con-
figuration desired. All versions of this device are
available with optional lead-free finishing.
Electrical Schematics
V
N
1
2
4
3
CM1218-03
SOT-143
V
N
1
2
3
CM1218-02
SOT23-3
SC70-3
V
N
3
CM1218-04
SOT23-5 /
SC70-5
5
4
2
1
V
N
3
CM1218-05
SOT23-6 /
SC70-6
6
4
2
1
5
2004 California Micro Devices Corp. All rights reserved.
2
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
12/22/04
CM1218
Ordering Information
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
PIN DESCRIPTIONS
LEADS
NAME
DESCRIPTION
(Refer to package / pinout diagrams)
CHx
The cathode of the respective TVS diode, which should be
connected to the node requiring transient voltage protection.
(Refer to package / pinout diagrams)
V
N
The anode of the TVS diodes.
PACKAGE / PINOUT DIAGRAMS
Note: SOT23, SC70 and SOT143 and packages may differ in size. These drawings are not to scale.
3-lead SOT23
CH1
1
2
3
Top View
R2 /
3-lead SC70
1
2
3
Top View
R2 /
4-lead SOT143
1
4
2
3
R3 /
5-lead SOT23
1
2
5
3
4
R4 /
Top View
5-lead SC70
1
2
5
3
4
R4/
Top View
6-lead SC70
1
2
6
5
3
4
R5
/
6-lead SOT23
1
2
6
5
3
4
R5 /
Top View
Top View
Top View
R2R
R2R
R3R
R4R
R4R
R5R
R5
R
CH2
V
N
CH1
CH2
V
N
CH1
CH2
CH3
CH4
V
N
V
N
CH1
CH2
CH3
CH4
V
N
CH1
CH2
V
N
CH3
CH5
CH4
CH1
CH2
V
N
CH3
CH5
CH4
V
N
CH1
CH2
CH3
PART NUMBERING INFORMATION
Leads
Package
Standard Finish
Lead-free Finish
Ordering Part
Number
1
Part Marking
Ordering Part
Number
1
Part Marking
3
SOT23-3
CM1218-02ST
R2
CM1218-02SO
R2R
3
SC70-3
CM1218-02SC
R2
CM1218-02S7
R2R
4
SOT143
CM1218-03SS
R3
CM1218-03SR
R3R
5
SOT23-5
CM1218-04ST
R4
CM1218-04SO
R4R
5
SC70-5
CM1218-04SC
R4
CM1218-04S7
R4R
6
SOT23-6
CM1218-05ST
R5
CM1218-05SO
R5R
6
SC70-6
CM1218-05SC
R5
CM1218-05S7
R5R
2004 California Micro Devices Corp. All rights reserved.
12/22/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
3
CM1218
Specifications
Note 1: All parameters specified at T
A
= -40C to +85C unless otherwise noted.
Note 2: These parameters guaranteed by design and characterization.
Note 3: Human Body Model per MIL-STD-883, Method 3015, C
Discharge
= 100pF, R
Discharge
= 1.5K
, V
N
grounded.
Note 4: Standard IEC 61000-4-2 with C
Discharge
= 150pF, R
Discharge
= 330
, V
N
grounded.
Note 5: These measurements performed with no external capacitor on CH
X
.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RATING
UNITS
Storage Temperature Range
-65 to +150
C
Package Power Dissipation
SC70
SOT23-3, SOT23-5, SOT23-6, SOT143
0.2
0.225
W
W
STANDARD OPERATING CONDITIONS
PARAMETER
RATING
UNITS
Operating Temperature
-40 to +85
C
ELECTRICAL OPERATING CHARACTERISTICS
(NOTE 1)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
C
IN
Channel Input Capacitance
T
A
= 25C, 2.5VDC, 1MHz; Note 2
7
pF
C
IN
Differential Channel I/O to GND
Capacitance
T
A
= 25C, 2.5VDC, 1MHz; Note 2
0.19
pF
V
RSO
Reverse Stand-off Voltage
I
R
=10
A, T
A
= 25C
5.5
V
I
R
=1mA, T
A
= 25C
6.1
V
I
LEAK
Leakage Current
V
IN
=5.0VDC, T
A
= 25C
1
A
V
SIG
Small Signal Clamp Voltage
Positive Clamp
Negative Clamp
I = 10mA, T
A
= 25C
I = -10mA, T
A
= 25C
6.8
-0.8
V
V
V
ESD
ESD Withstand Voltage
Contact Discharge per IEC 61000-
4-2 standard
Human Body Model, MIL-STD-883,
Method 3015
Notes 2, 4 & 5; T
A
= 25C
Notes 2, 3 & 5; T
A
= 25C
+15
+30
kV
kV
R
D
Diode Dynamic Resistance
Forward Conduction
Reverse Conduction
T
A
= 25C; Notes 2 & 3
1.1
2.7
2004 California Micro Devices Corp. All rights reserved.
4
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
12/22/04
CM1218
Performance Information
Diode Capacitance
Typical diode capacitance with respect to positive TVS cathode voltage (reverse voltage across the diode) is given
in
Figure 1
.
Figure 1. Diode Capacitance vs. Reverse Voltage
Typical High Current Diode Characteristics
Measurements are made in pulsed mode with a nominal pulse width of 0.7ms.
C
a
pacitanc
e
(
Normaliz
ed)
DC Voltage
Typical Input VI Characteristics
(Pulse-mode measurements, pulse width = 0.7ms nominal)
-1.6
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
Input Voltage (V)
Input
Current
(A)
R
D
=
1
slope
R
D
=
1
slope
2004 California Micro Devices Corp. All rights reserved.
12/22/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
5
CM1218
Mechanical Details
CM1218 devices are supplied in the following pack-
ages: SOT23-3, SOT143, SOT23-5, SOT23-6, SC70-3,
SC70-5, and SC70-6.
SOT23-3 Mechanical Specifications
Dimensions for CM1218-02ST/SO devices supplied in
3-pin SOT23 packages are presented below.
For complete information on the SOT23-3, see the Cal-
ifornia Micro Devices SOT23 Package Information doc-
ument.
Package Dimensions for SOT23-3.
PACKAGE DIMENSIONS
Package
SOT23-3 (JEDEC name is TO-236)
Pins
3
Dimensions
Millimeters
Inches
Min
Max
Min
Max
A
0.89
1.12
0.0350
0.0441
A1
0.01
0.10
0.0004
0.0039
b
0.30
0.50
0.0118
0.0197
c
0.08
0.20
0.0031
0.0079
D
2.80
3.04
0.1102
0.1197
E
2.10
2.64
0.0827
0.1039
E1
1.20
1.40
0.0472
0.0551
e
0.95 BSC
0.0374 BSC
e1
1.90 BSC
0.0748 BSC
L
0.40
0.60
0.0157
0.0236
L1
0.54 REF
0.0213 REF
# per tape
and reel
3000 pieces
Controlling dimension: millimeters
TOP VIEW
e
E1 E
2
e1
b
3
1
Mechanical Package Diagrams
A
SIDE VIEW
L1
END VIEW
D
A1
c
L
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