ICS844256AM datasheet(10/13 Pages) ICST

부품명	ICS844256AM

상세설명	FEMTOCLOCKS??CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER

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10 / 13 page

844256AM

www.icst.com/products/hiperclocks.html

REV. A NOVEMBER 29, 2005

Integrated

Circuit

Systems, Inc.

ICS844256

FEMTOCLOCKS™CRYSTAL-TO-LVDS

FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER

PRELIMINARY

3.3V, 2.5V LVDS DRIVER TERMINATION

A general LVDS interface is shown in Figure 3. In a 100

differential transmission line environment, LVDS drivers

FIGURE 3. TYPICAL LVDS DRIVER TERMINATION

require a matched load termination of 100

Ω across near

the receiver input.

INPUTS:

LVCMOS CONTROL PINS:

All control pins have internal pull-ups or pull-downs; additional

resistance is not required but can be added for additional

protection. A 1k

Ω resistor can be used.

RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS

OUTPUTS:

LVDS

All unused LVDS output pairs can be either left floating or

terminated with 100

Ω across. If they are left floating, we

recommend that there is no trace attached.

2.5V or 3.3V

VDD

100 Ohm Differential Transmission Line

100

LVDS_Driv er

ICS844256AM 데이터시트(PDF) 10 Page - Integrated Circuit Systems