LMX2541SQE3030E/NOPB National Semiconductor, LMX2541SQE3030E/NOPB Datasheet - Page 11

• Manufacturer Part Number: LMX2541SQE3030E/NOPB
• Description: IC PLL FREQ SYNTH W/VCO 36LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Clock/Frequency Synthesizer (RF)r

Specifications of LMX2541SQE3030E/NOPB

• Pll: Yes
• Input: Clock
• Output: Clock
• Number Of Circuits: 1
• Ratio - Input:output: 2:2
• Differential - Input:output: No/No
• Frequency - Max: 3.23GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-LLP
• Frequency-max: 3.23GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMX2541SQE3030ETR

Serial Data Timing Diagram
There are several other considerations for programming:
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The DATA is clocked into a shift register on each rising edge of the CLK signal. On the rising edge of the LE signal, the data is
sent from the shift registers to an actual counter.
A slew rate of at least 30 V/μs is recommended for the CLK, DATA, and LE signals.
After the programming is complete, the CLK, DATA, and LE signals should be returned to a low state.
When using the part in Full Chip Mode with the Integrated VCO, LE should be kept high no more than 1 us after the programming
of the R0 register. Failure to do so may interfere with the digital VCO calibration.
If the CLK and DATA lines are toggled while the in VCO is in lock , as is sometimes the case when these lines are shared with
other parts, the phase noise may be degraded during the time of this programming.
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