LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 12

• Manufacturer Part Number: LMK04000BEVAL/NOPB
• Description: BOARD EVAL PRECISION CLOCK PLL
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMK04000BEVAL/NOPB

• Main Purpose: Timing, Clock Conditioner
• Embedded: No
• Utilized Ic / Part: LMK04000
• Primary Attributes: 122.88 MHz VCXO
• Secondary Attributes: Integrated PLL & VCO
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMK04000BEVAL; LMK04000BEVAL

3. Connect a low noise reference clock source (122.88 MHz for the XTAL option or 61.44 MHz VCXO
4. Install the latest version of CodeLoader from National’s web site.
option, 10 MHz for the 100 MHz VCXO option) to the CLKin0* SMA connector (CLKin0 may be left
unconnected, as the default configuration of the board uses a single-ended input for the reference).
This is the default reference input. The power level of the reference input should be 6 dBm +/- 1 dBm
for best performance. The reference input to the LMK040xx is AC coupled so the reference source may
be either AC or DC biased. The default signal path configuration is singled-ended. Using a differential
reference source requires modification of the board. A sinusoidal or square signal may be used, though
better performance may be obtained with a higher slew rate on the input clock.
L M K 0 4 0 X X
Figure 8. Parallel Port Programming Connection
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