SUPER1284 Datasheet, PDF (5/5 Pages) California Micro Devices Corp – P/ACTIVE IEEE 1284 ECP/EPP TERMINATION NETWORK

CALIFORNIA MICRO DEVICES
SUPER 1284
Figure 4 shows typical Insertion Loss graphs for the Super 1284 for Data and Strobe signals. The curves are dependent on
the physical location of the filter elements with respect to the ground and V_CC terminals of the device. These graphs are
measured in a 50 Ohm environment. The signal is introduced at the series resistor input and the output is measured at the
corresponding filter capacitor. The graphs labeled A,B, and C are measured between 14 (input) and 16 (output), pin 3
(input) and 26 (output), and pin 6 (input) and 23 (output), respectively. The A graph depicts “worst case” filter
performance, while C represents a “best case” situation. Graphs of all other filter elements will fall in between these two.
Typical Filter Insertion Loss for Super 1284 (S₁₂ in dB, T_A = 25^O C)
S₁₂ in dB
0
-10
A
-20
B
-30
C
-40
-50
300 450 600 750 900 1050 1200
(FREQUENCY, MHz)
Figure 4
Filter insertion loss is measured using Hewlett Packard HP 8753C Analyzer
© 1998 California Micro Devices Corp. All rights reserved.
7/98 Rev. 1
215 Topaz Street, Milpitas, California 95035 Tel: [phone] Fax: [phone] www.calmicro.com
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