PRELIMINARY
CM1249
Low Capacitance Transient Voltage
Suppressors / ESD Protectors
Features
•
•
Low I/O capacitance at 5pF typical
In-system ESD protection to
±8kV
contact
discharge, per the IEC 61000-4-2 international
standard
Four channels of ESD protection
Compact SOT-953 package saves board space
and facilitates layout in space-critical applications
Each I/O pin can withstand over 1000 ESD strikes
RoHS (Restriction of Hazard Substances) compli-
ant
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 Schematic
CM1249-04
5
4
1
2
V
N
3
SOT-953
PACKAGE / PINOUT DIAGRAM
Top View
CH1
1
5
CH4
Part
Marking
4
CH3
V
N
2
CH2
3
5-lead SOT-953
Note: This drawing is not to scale.
© 2007 California Micro Devices Corp. All rights reserved.
6/05/07
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
1
PRELIMINARY
CM1249
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
Lead-free Finish
Leads
5
Package
SOT953
Ordering Part Number
1
CM1249-04S9
Part Marking
L9
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
Package Power Dissipation
SOT953-5
RATING
–65 to +150
0.2
0.225
UNITS
°C
W
W
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature
RATING
–40 to +85
UNITS
°C
© 2007 California Micro Devices Corp. All rights reserved.
2
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
6/05/07
PRELIMINARY
CM1249
ELECTRICAL OPERATING CHARACTERISTICS
(NOTE 1)
SYMBOL PARAMETER
C
IN
Channel Input Capacitance
Differential Channel I/O to GND
Capacitance
Leakage Current
Small Signal Clamp Voltage
Positive Clamp
Negative Clamp
CONDITIONS
T
A
= 25°C, 0VDC, 1MHz; Note 2
T
A
= 25°C, 2.5VDC, 1MHz; Note 2
V
IN
= 3.5VDC, T
A
= 25°C
I = 5mA, T
A
= 25°C
I = –5mA, T
A
= 25°C
6.1
–1.5
±8
±15
MIN
TYP
5
0.14
0.75
8.5
–0.4
MAX
7
UNITS
pF
pF
Δ
C
IN
I
LEAK
V
SIG
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; Note 2
0.7
2.1
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
.
© 2007 California Micro Devices Corp. All rights reserved.
6/05/07
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
3
PRELIMINARY
CM1249
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)
© 2007 California Micro Devices Corp. All rights reserved.
4
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
6/05/07
PRELIMINARY
CM1249
Mechanical Details
SOT-953 Mechanical Specifications
Dimensions for the CM1249, supplied in a 5-pin SOT-
953 package are presented below.
Mechanical Package Diagrams
TOP VIEW
PACKAGE DIMENSIONS
Package
Leads
Dim.
A
b
c
D
E
E1
e
L
L1
# per
tape and
reel
0.05
0.125
Millimeters
Min
0.40
0.10
0.05
0.95
0.75
0.95
Nom
0.45
0.15
0.10
1.00
0.80
1.00
0.35 BSC
0.10
0.150
0.15
0.175
Max
0.50
0.20
0.15
1.05
0.85
1.05
Min
0.016
0.004
0.002
0.037
0.029
0.037
0.002
0.005
SOT-953
5
Inches
Nom
0.018
0.006
0.004
0.039
0.031
0.039
0.004
0.006
Max
0.020
0.008
0.006
0.041
0.033
0.041
0.006
0.007
Pin 1
Marking
1
5
D
4
E
E1
2
3
e
b
0.10
M
0.10
M
CAB
C
SIDE VIEW
A
0.014 BSC
5000 pieces
END VIEW
Controlling dimension: millimeters
c
C
SEATING
PLANE
L
L1
Package Dimensions for SOT-953
© 2007 California Micro Devices Corp. All rights reserved.
6/05/07
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
5
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