参数资料
型号: ICS844004AGI-04LF
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟产生/分配
英文描述: 680 MHz, OTHER CLOCK GENERATOR, PDSO24
封装: 4.40 X 7.80 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-24
文件页数: 12/13页
文件大小: 200K
代理商: ICS844004AGI-04LF
844004AGI-04
www.icst.com/products/hiperclocks.html
REV. A JANUARY 26, 2006
8
Integrated
Circuit
Systems, Inc.
ICS844004I-04
FEMTOCLOCKSCRYSTAL/LVCMOS-TO-
LVDS FREQUENCY SYNTHESIZER
PRELIMINARY
3.3V LVDS DRIVER TERMINATION
A general LVDS interface is shown in Figure 3. In a 100
Ω
differential transmission line environment, LVDS drivers
require a matched load termination of 100
Ω across near
FIGURE 3. TYPICAL LVDS DRIVER TERMINATION
the receiver input. For a multiple LVDS outputs buffer, if
only partial outputs are used, it is recommended to termi-
nate the unused outputs.
R1
100
3.3V
100 Ohm Differential Transmission Line
3.3V
+
-
LVDS
INPUTS:
CRYSTAL INPUT:
For applications not requiring the use of the crystal oscillator
input, both XTAL_IN and XTAL_OUT can be left floating.
Though not required, but for additional protection, a 1k
Ω
resistor can be tied from XTAL_IN to ground.
CLK INPUT:
For applications not requiring the use of a clock input, it can
be left floating. Though not required, but for additional
protection, a 1k
Ω resistor can be tied from the CLK input to
ground.
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 outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
相关PDF资料
PDF描述
ICS844004AGILF 226.66 MHz, OTHER CLOCK GENERATOR, PDSO24
ICS844004AGT 226.66 MHz, OTHER CLOCK GENERATOR, PDSO24
ICS844004AG 226.66 MHz, OTHER CLOCK GENERATOR, PDSO24
ICS844004BGI-01LFT 156.25 MHz, OTHER CLOCK GENERATOR, PDSO24
ICS844008AY-16LF 125 MHz, OTHER CLOCK GENERATOR, PQFP32
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