PRELIMINARY
CM1485
Dual Channel EMI Filter with ESD Protection
Features
•
•
•
•
•
•
•
Two channels of EMI filtering with integrated ESD
protection
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
±15kV
ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
±30kV
ESD protection on each channel (HBM)
Greater than 30dB attenuation (typical) at 1 GHz
6-lead SOT-563 package
Available with lead-free finishing
Product Description
The CM1485 is a 2 channel pi-style EMI filter array with
ESD protection, housed in a 6-lead SOT-563 package.
The CM1485 has component values of 16pF-100Ω-
16pF per channel. The CM1485 has a cut-off fre-
quency of 125MHz and can be used in applications
with data rates up to 48Mbps. The parts include ESD
diodes on every pin, which provide a very high level of
protection for sensitive electronic components that may
be subjected to electrostatic discharge (ESD). The
ESD protection diodes safely dissipate ESD strikes of
±15kV,
well beyond the maximum requirement of the
IEC61000-4-2 international standard. Using the MIL-
STD-883 (Method 3015) specification for Human Body
Model (HBM) ESD, the pins are protected for contact
discharges at greater than
±30kV.
This device is particularly well-suited for portable elec-
tronics (e.g. wireless handsets, PDAs, notebook com-
puters) because of its small package and easy-to-use
pin assignments. In particular, the CM1485 is ideal for
EMI filtering and protecting data and control lines for
the I/O data ports, LCD display and camera interface in
mobile handsets.
The CM1485 is housed in a small, 6-lead SOT-563
package and is available with lead-free finishing.
Applications
•
•
•
•
•
•
LCD and Camera data lines in mobile handsets
I/O port protection for mobile handsets, notebook
computers, PDAs etc.
EMI filtering for data ports in cell phones, PDAs or
notebook computers.
Wireless handsets
Handheld PCs/PDAs
LCD and camera modules
Electrical Schematic
100Ω
FILTER+ESDn*
16pF
FILTER+ESDn*
R
16pF
C
GND
C
1 of 2 EMI/RFI + ESD Channels
* See Package/Pinout Diagram
for expanded pin information.
© 2006 California Micro Devices Corp. All rights reserved.
05/12/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
1
PRELIMINARY
CM1485
PACKAGE / PINOUT DIAGRAMS
TOP VIEW
CH1
1
6
CH2
N85
GND
2
5
GND
CH1
3
4
CH2
Notes:
1) These drawings are not to scale.
6-lead SOT-563
PIN DESCRIPTIONS
NAME
1
2
3
4
5
6
FILTER1
GND
FILTER1
FILTER2
GND
FILTER2
DESCRIPTION
Filter + ESD Channel 1
Ground
Filter + ESD Channel 1
Filter + ESD Channel 2
Ground
Filter + ESD Channel 2
Ordering Information
PART NUMBERING INFORMATION
Lead-free Finish
Pins
6
Package
SOT-563
Ordering Part Number
1
CM1485-02SE
Part Marking
N85
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
© 2006 California Micro Devices Corp. All rights reserved.
2
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
05/12/06
PRELIMINARY
CM1485
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
DC Power per Resistor
DC Package Power Rating
RATING
-65 to +150
100
0.15
UNITS
°C
mW
W
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature Range
RATING
-40 to +85
UNITS
°C
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE1)
SYMBOL
R
C
I
LEAK
V
BR
V
ESD
PARAMETER
Resistance
Capacitance C
Diode Leakage Current (reverse bias)
Breakdown Voltage
Positive Clamp
In-system ESD Withstand Voltage
a) Human Body Model, MIL-STD-883,
Method 3015
b) Contact Discharge per IEC 61000-4-
2 Level 4
Dynamic Resistance
Positive
Negative
Cut-off Frequency
Z
SOURCE
=50Ω, Z
LOAD
=50Ω
Absolute Attenuation @ 1GHz from 0dB
Level
6GHz from 0dB Level
Z
SOURCE
= 50Ω, Z
LOAD
= 50Ω,
DC Bias = 0V; Notes 1, 4 and 5
Z
SOURCE
= 50Ω, Z
LOAD
= 50Ω,
DC Bias = 0V; Notes 1, 4 and 5
At 2.5VDC Reverse Bias, 1MHz,
30mVAC
V
DIODE
=
+
3.0V
I
LOAD
= 1mA
Notes 2 and 3
±30
±15
kV
kV
6.0
7.0
CONDITIONS
MIN
90
TYP
100
16
1.0
MAX
110
UNITS
Ω
pF
μA
V
R
DYN
2.3
0.9
125
35
30
Ω
Ω
MHz
dB
dB
f
C
A
1GHz
A
800MHz -
Absolute Attenuation @ 800MHz to
6GHz
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
T
A
=25
°
C unless otherwise specified.
ESD applied to input and output pins with respect to GND, one at a time.
These parameters are guaranteed by design and characterization.
Attenuation / RF curves characterized by a network analyzer using microprobes.
These parameters are NOT guaranteed by design, characterization and production.
© 2006 California Micro Devices Corp. All rights reserved.
05/12/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
3
PRELIMINARY
CM1485
Performance Information
Typical Filter Performance (T
A
=25°C, DC Bias=0V, 50 Ohm Environment)
Figure 1. Insertion Loss vs. Frequency (FILTER1 Input to GND)
Figure 2. Insertion Loss vs. Frequency (FILTER2 Input to GND)
© 2006 California Micro Devices Corp. All rights reserved.
4
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
05/12/06
PRELIMINARY
CM1485
Performance Information (cont’d)
Typical Diode Capacitance vs. Input Voltage
Capacitance (Normalized)
DC Voltage
Figure 3. Filter Capacitance vs. Input Voltage
(normalized to capacitance at 2.5VDC and 25°C)
© 2006 California Micro Devices Corp. All rights reserved.
05/12/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
5
京公网安备 11010802033920号
EEWORLD
