LMK02000ISQ/NOPB National Semiconductor, LMK02000ISQ/NOPB Datasheet - Page 18

• Manufacturer Part Number: LMK02000ISQ/NOPB
• Description: IC CLOCK CONDITIONER PREC 48-LLP
• Manufacturer: National Semiconductor
• Type: Clock Conditionerr

Specifications of LMK02000ISQ/NOPB

• Pll: Yes
• Input: Clock
• Output: LVDS, LVPECL
• Number Of Circuits: 1
• Ratio - Input:output: 2:8
• Differential - Input:output: Yes/Yes
• Frequency - Max: 800MHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LLP
• Frequency-max: 800MHz
• For Use With: LMK02000EVAL-1 - BOARD EVAL WITH 245.76 VCXOLMK02000EVAL2 - BOARD EVALUATION FOR LMK02000
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMK02000ISQ; LMK02000ISQTR

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To minimize junction temperature it is recommended that a
simple heat sink be built into the PCB (if the ground plane
layer is not exposed). This is done by including a copper area
of about 2 square inches on the opposite side of the PCB from
the device. This copper area may be plated or solder coated
to prevent corrosion but should not have conformal coating (if
FIGURE 2.
18
possible), which could provide thermal insulation. The vias
shown in Figure 2 should connect these top and bottom cop-
per layers and to the ground layer. These vias act as “heat
pipes” to carry the thermal energy away from the device side
of the board to where it can be more effectively dissipated.
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