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MK74CB44RTR Datasheet(PDF) 4 Page - Integrated Circuit Systems

Part No. MK74CB44RTR
Description  Quad 1 to 4 Buffalo™ Clock Driver
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Maker  ICST [Integrated Circuit Systems]
Homepage  http://www.icst.com
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MK74CB44RTR Datasheet(HTML) 4 Page - Integrated Circuit Systems

   
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MK74CB44
Quad 1 to 4 Buffalo™ Clock Driver
MDS 74CB44 B
4
Revision 022000
Printed 11/17/00
Integrated Circuit Systems, Inc. • 525 Race St. • San Jose • CA • 95126 • (408)295-9800tel • www.icst.com
PRELIMINARY INFORMATION
Maximum Speed/Application Notes
The maximum speed at which the chip can operate is limited by power dissipation of the package. Graph 1
shows the operating frequency plotted against load capacitance per pin for a die temperature of 125°C. This is
at VDD = 3.3 V, 70°C and with 33
Ω series termination resistor. The termination resistors are essential
because they allow a large proportion of the total power to be dissipated outside the package. Reducing or
eliminating the series termination will cause an increase in die temperature. It is not recommended to operate
the chip at die temperature greater than 125°C. Also note that the load capacitance per pin must include PC
board parasitics such as trace capacitance. ICS has other buffers specified to 250 MHz with heavier loads.
If not all outputs of the chip are used, it is possible to operate the chip faster with larger loads. Unused outputs
should be left unconnected. Consult ICS for your specific requirement.
300
250
200
150
100
50
0
80
60
40
20
0
Do not operate in this area .
Load Capacitance/per pin (pF), all 16 outputs loaded
Graph 1
MK74CB44
Maximum Speed at 3.3 V


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