LMX2541SQE2380E/NOPB National Semiconductor, LMX2541SQE2380E/NOPB Datasheet - Page 44

• Manufacturer Part Number: LMX2541SQE2380E/NOPB
• Description: IC PLL FREQ SYNTH W/VCO 36LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Clock/Frequency Synthesizer (RF)r

Specifications of LMX2541SQE2380E/NOPB

• Pll: Yes
• Input: Clock
• Output: Clock
• Number Of Circuits: 1
• Ratio - Input:output: 2:2
• Differential - Input:output: No/No
• Frequency - Max: 2.53GHz
• 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: 2.53GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMX2541SQE2380ETR

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2.5 REGISTER R3
This register controls miscellaneous features of the device.
MODE[1:0] -- Operational Mode
The LMX2541 can be run in several operational modes as listed in the table below:
POWERDOWN -- Powerdown Bit
Enabling this bit powers down the entire device, although register and VCO calibration information is retained.
XO - Crystal Oscillator Mode Select
When this bit is enabled, a crystal with appropriate load capacitors can be attached between the OSCin and OSCin* pins in order
to form a crystal oscillator.
CPG[4:0] -- Charge Pump Current
This word programs the charge pump current gain. The current is programmable between 100 uA and 3.2 mA in 100 uA steps.
MODE
0
1
2
3
CPG
31
...
0
1
2
3
Test (Reserved)
External VCO
Divider Only
Name
Full
Charge Pump State
Enabled
Enabled
Enabled
Enabled
Divider
32X
1X
2X
3X
4X
44
...
Disabled
Enabled
Enabled
Enabled
PLL
Typical Charge Pump Current (µA)
3200
100
200
300
...
Disabled
Disabled
Enabled
Enabled
VCO