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
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.
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
Electrical Schematics
CM1218-02
V
N
3
4
CM1218-03
3
1
2
1
V
N
2
SOT23-3
SC70-3
CM1218-04
5
4
6
SOT-143
CM1218-05
5
4
1
2
V
N
3
1
2
V
N
3
SOT23-5 /
SC70-5
©
2004 California Micro Devices Corp. All rights reserved.
12/22/04
SOT23-6 /
SC70-6
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
1
CM1218
PACKAGE / PINOUT DIAGRAMS
Top View
CH1
Top View
CH1
Top View
CH1
Top View
CH4
CH1
V
N
1
1
1
5
1
5
CH4
R4 /
R4R
R4/
R4R
R2 /
R2R
CH2
R2 /
R2R
3
V
N
CH2
3
V
N
V
N
2
2
2
2
CH2
3
4
CH3
CH2
3
4
CH3
3-lead SOT23
3-lead SC70
5-lead SOT23
5-lead SC70
Top View
CH1
V
N
Top View
CH5
CH1
V
N
Top View
CH5
V
N
1
6
1
6
1
4
CH3
R5 /
R5R
R3 /
R3R
R5 /
R5R
2
5
CH4
2
5
CH4
CH2
3
4
CH3
CH2
3
4
CH3
CH1
2
3
CH2
6-lead SOT23
6-lead SC70
4-lead SOT143
Note: SOT23, SC70 and SOT143 and packages may differ in size. These drawings are not to scale.
PIN DESCRIPTIONS
LEADS
(Refer to package / pinout diagrams)
(Refer to package / pinout diagrams)
NAME
CHx
V
N
DESCRIPTION
The cathode of the respective TVS diode, which should be
connected to the node requiring transient voltage protection.
The anode of the TVS diodes.
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
Leads
3
3
4
5
5
6
6
Package
SOT23-3
SC70-3
SOT143
SOT23-5
SC70-5
SOT23-6
SC70-6
Ordering Part
Number
1
CM1218-02ST
CM1218-02SC
CM1218-03SS
CM1218-04ST
CM1218-04SC
CM1218-05ST
CM1218-05SC
Part Marking
R2
R2
R3
R4
R4
R5
R5
Lead-free Finish
Ordering Part
Number
1
CM1218-02SO
CM1218-02S7
CM1218-03SR
CM1218-04SO
CM1218-04S7
CM1218-05SO
CM1218-05S7
Part Marking
R2R
R2R
R3R
R4R
R4R
R5R
R5R
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
©
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
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
Package Power Dissipation
SC70
SOT23-3, SOT23-5, SOT23-6, SOT143
RATING
-65 to +150
0.2
0.225
UNITS
°C
W
W
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature
RATING
-40 to +85
UNITS
°C
ELECTRICAL OPERATING CHARACTERISTICS
(NOTE 1)
SYMBOL PARAMETER
C
IN
Channel Input Capacitance
Differential Channel I/O to GND
Capacitance
Reverse Stand-off Voltage
CONDITIONS
T
A
= 25°C, 2.5VDC, 1MHz; Note 2
T
A
= 25°C, 2.5VDC, 1MHz; Note 2
I
R
=10µA, T
A
= 25°C
I
R
=1mA, T
A
= 25°C
I
LEAK
V
SIG
Leakage Current
Small Signal Clamp Voltage
Positive Clamp
Negative Clamp
V
IN
=5.0VDC, T
A
= 25°C
I = 10mA, T
A
= 25°C
I = -10mA, T
A
= 25°C
+15
+30
6.8
-0.8
5.5
6.1
1
MIN
TYP
7
0.19
MAX
UNITS
pF
pF
V
V
∆
C
IN
V
RSO
µ
A
V
V
kV
kV
V
ESD
ESD Withstand Voltage
Contact Discharge per IEC 61000- Notes 2, 4 & 5; T
A
= 25°C
4-2 standard
Human Body Model, MIL-STD-883, Notes 2, 3 & 5; T
A
= 25°C
Method 3015
Diode Dynamic Resistance
Forward Conduction
Reverse Conduction
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
R
D
T
A
= 25°C; Notes 2 & 3
1.1
2.7
Ω
Ω
All parameters specified at T
A
= -40°C to +85°C unless otherwise noted.
These parameters guaranteed by design and characterization.
Human Body Model per MIL-STD-883, Method 3015, C
Discharge
= 100pF, R
Discharge
= 1.5KΩ, V
N
grounded.
Standard IEC 61000-4-2 with C
Discharge
= 150pF, R
Discharge
= 330Ω, V
N
grounded.
These measurements performed with no external capacitor on CH
X
.
©
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
Performance Information
Diode Capacitance
Typical diode capacitance with respect to positive TVS cathode voltage (reverse voltage across the diode) is given
in
Figure 1.
Capacitance (Normalized)
DC Voltage
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.
Typical Input VI Characteristics
(Pulse-mode measurements, pulse width = 0.7ms nominal)
1.6
1.4
1.2
1.0
0.8
0.6
R
D
=
1
slope
Input Current (A)
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
R
D
=
1
slope
Input Voltage (V)
©
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
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.
Mechanical Package Diagrams
TOP VIEW
b
3
PACKAGE DIMENSIONS
Package
Pins
Dimensions
A
A1
b
c
D
E
E1
e
e1
L
L1
# per tape
and reel
Millimeters
Min
0.89
0.01
0.30
0.08
2.80
2.10
1.20
Max
1.12
0.10
0.50
0.20
3.04
2.64
1.40
Min
0.0350
0.0004
0.0118
0.0031
0.1102
0.0827
0.0472
SOT23-3 (JEDEC name is TO-236)
3
Inches
Max
0.0441
0.0039
0.0197
0.0079
0.1197
0.1039
0.0551
END VIEW
1
2
E1 E
e
e1
SIDE VIEW
D
A1 A
0.95 BSC
1.90 BSC
0.40
0.60
0.54 REF
0.0374 BSC
0.0748 BSC
0.0157
0.0236
c
L1
L
0.0213 REF
3000 pieces
Controlling dimension: millimeters
Package Dimensions for SOT23-3.
©
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
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