LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 20

• 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

The Bits/Pins tab allows the user to:
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setup various clock output options. This will also be reflected on the Clock Outputs tab.
Manipulate GOE and SYNC signal states (through the 10-pin header)
Select internal loop filter components for PLL2
Select Reference clock functional mode: CLKin_SEL (Manual or Auto-revertive)
Select the Loss-of-Signal (LOS) output type (LOS_TYPE).
Select the reference clock input buffer type: CLKin0_BUFTYPE and CLKin1_BUFTYPE (MOS or
Bipolar junction)
Enable/disable crystal mode: EN_PLL2_XTAL.
Enable/disable PLL2 reference clock (OSCin) frequency doubler mode: EN_PLL2_REF2X.
Set the OSCin (VCXO or XTAL) frequency (OSCin_FREQ). NOTE: This value should match
the Reference Oscillator values entered in the PLL1 and PLL2 tabs. It is important to enter
the correct frequency value in this field, as it is used by the internal state machine of the
LMK040XX to execute its calibration and tuning routine for the internal VCO. An incorrect
value may result in an unlocked condition for the synthesizer.
L M K 0 4 0 X X
E V A L U A T I O N
Figure 13. Bits/Pins tab.
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