CX28331-1X CONEXANT [Conexant Systems, Inc], CX28331-1X Datasheet - Page 58
CX28331-1X
Manufacturer Part Number
CX28331-1X
Description
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Manufacturer
CONEXANT [Conexant Systems, Inc]
Datasheet
1.CX28331-1X.pdf
(68 pages)
- Current page: 58 of 68
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3.0 Applications
3.1 PCB Design Considerations for CX2833i
3.1.2 Impedance Matching
3.1.3 Other Passive Parts
3.1.4 IBIS Models
3.1.5 Recommended Vendors
3-2
America
Address:
Telo:
Fax:
Northern Asia
Telo:
Northern Europe
Telo:
Fax:
Product: Transformers
Pulse
Corporate Office
12220 World Trade Drive
San Diego, CA 92128
858-674-8100
858-674-8262
Pulse
3F-4, No. 81, Sec. 1
Hsin Tai Wu Road
Hsi-Chih
Tapei Hsien, Taiwan
R.O.C.
886-2-26980228
886-2-26980948
Pulse
1S2 Huxley Road
The Surrey Research Park
Guildford, Surrey GU2 5RE
United Kingdom
44-1483-401700
44-1483-401701
It is critical that traces around the transformers and matching resistors be kept to a
minimum length and, in the following cases, the trace impedance be matched to
75
The reference design uses the Pulse T3001 extended temperature range 1:1
transformer for the coupling of the BNC connector to the device.
analog input VDD pins are type 2508056017Y0 from Fair-Rite Products
Corporation. The bulk capacitor used for where the power enters the board
should be a tantulum–type capacitor, the recommended value and type is a 220
tantulum capacitor.
IBIS (Input/Output Buffer Interface Specification) models for the
CX28331/CX28332/CX28333-1x and -3x are available from Conexant’s web site
(www.conexant.com).
• The impedance from the BNC connector to the transformer
• The impedance from the transformer to the matching resistors
The ferrite beads used to decouple the receive- and transmit-VDD pins on all
with a 10% tolerance:
Conexant
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Telo:
Web site:
Telo:
Fax:
E-mail:
Web site:
CX28331/CX28332/CX28333
Product: Ferrite Beads
Fair-Rite Products Corp.
P.O. Box J
One Commercial Row
Wallkill, NY 12589
914-895-2055
www.Fair-Rite.com
Product: Crystals
Crystek Corp.
12730 Commonwealth Drive
Fort Myers, FL 33913
800-237-3061
941-561-1025
sales@crystek.com
www.crystek.com
100985A
µ
f
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