LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 33

• 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

L M K 0 4 0 X X
E V A L U A T I O N
B O A R D
O P E R A T I N G
I N S T R U C T I O N S
Appendix G
This appendix contains instructions for changing the active on-board oscillator for PLL1.
Changing from Crystal Resonator to VCXO
If the board has been setup to use the crystal-based oscillator with PLL1, the crystal may be disabled and
the VCXO enabled as described on the following pages:
1. Install a zero Ohm resistor in R79 (near the VCXO)
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