© 2005 California Micro Devices Corp. All rights reserved.
11/09/05 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.cmd.com 1
CSPRC032A
4 Channel EMI Filter Network
Features
• 4 EMI filter lines per device
• Filters attenuate to –30dB at 3GHz
• CSP package minimizes cross-talk
• 9-bump 2.485mm X 0.985mm Chip Scale
Package (CSP), 0.5mm pitch
• 0.30mm Eutectic solder bumps
• Ultra small footprint suitable for portable devices
• Lead-free version available
Applications
• EMI filtering for RF sections of wireless devices
• Cellular phones
• Cordless phones
• Internet appliances
•PDAs
• Laptop computers
Product Description
The CSPRC032A is a 4-channel low pass EMI filter (R-
C-R configuration) in a Chip Scale Package (CSP).
Many portable applications require the attenuation of
signals in the 800-3000 MHz band. California Micro
Devices’ unique thin film technology provides a mini-
mum of –25dB of attenuation over this frequency band.
The bump size and pitch of these filters are selected
such that the device can be placed directly on an FR4
printed circuit board using conventional assembly tech-
niques. The pin-out for the device features a signal
‘flow through’ design, allowing optimal signal routing.
The solder bump contacts are a 63/37 Sn/Pb alloy (Sn/
Ag/Cu for lead-free finish) and are 0.30 mm in diame-
ter.
The CSPRC032A is available in a space-saving, low-
profile Chip Scale Package with optional lead-free fin-
ishing.
Electrical Schematic
R
50
Ω
C
43pF
50
Ω
R
B1A1
GND
R
50
Ω
C
43pF
50
Ω
R
B2A2
GND
R
50
Ω
C
43pF
50
Ω
R
B4A4
GND
R
50
Ω
C
43pF
50
Ω
R
B5A5
GND
B3
GND
