MK74CB163

1 to 16 PECL to CMOS Buffalo™ Clock Driver

MDS 74CB163 A

4

Revision 112399

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126• (408)295-9800tel • www.icst.com

PRELIMINARY INFORMATION

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Maximum Speed

The maximum speed at which the chip can operate can be limited by power dissipation in 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 resistors. 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 temperatures greater than 125 °C. Also note that the load

capacitance per pin must include PC board parasitics such as trace capacitance. The MK74CB163 can safely

operate up to 156 MHz with all pins loaded at 15 pF.

Do not operate in this area .

Load Capacitance/per pin (pF)

Graph 1

Maximum Speed