LMX2332USLBX National Semiconductor, LMX2332USLBX Datasheet - Page 44

• Manufacturer Part Number: LMX2332USLBX
• Description: IC FREQ SYNTH DUAL 24LAMINATECSP
• Manufacturer: National Semiconductor
• Series: PLLatinum™r
• Type: PLL Frequency Synthesizerr

Specifications of LMX2332USLBX

• Pll: Yes with Bypass
• Input: CMOS, TTL
• Output: CMOS
• Number Of Circuits: 1
• Ratio - Input:output: 3:1
• Differential - Input:output: Yes/No
• Frequency - Max: 1.2GHz, 600MHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-Laminate CSP
• Frequency-max: 1.2GHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LMX2332USLBXTR

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Reg. Most Significant Bit
RF
R
2.0 Programming Description
2.5.4 PWDN IF
The PWDN IF bit is used to switch the IF PLL between a powered up and powered down mode.
Furthermore, the PWDN IF bit operates in conjuction with the TRI-STATE ID
powerdown mode.
2.6 RF R REGISTER
The RF R register contains the RF R_CNTR, PD_POL RF, ID
that compose the F
in the following sections.
2.6.1 RF R_CNTR[14:0]
The RF reference divider (RF R_CNTR) can be programmed to support divide ratios from 3 to 32767. Divide ratios less than 3
are prohibited.
2.6.2 PD_POL RF
The PD_POL RF bit is used to control the RF synthesizer’s phase detector polarity based on the VCO tuning characteristics.
Divide Ratio
F o LD1 F o LD3
PD_POL RF
Control Bit
21
Control Bit
PWDN IF
32767
3
4
•
20
STATE
TRI-
ID o
19
RF
o
LD control word. The detailed descriptions and programming information for each control word is discussed
18
ID o
RF
14
0
0
1
•
PD_
POL
Register Location
RF Synthesizer Phase Detector Polarity
Register Location
17
RF
IF SYNTHESIZER POWERDOWN
RF Synthesizer Programmable Reference Divider (R Counter)
13
0
0
1
•
RF R[17]
IF N[21]
16
12
0
0
1
•
15
14
11
0
0
1
•
13
RF VCO Characteristics
SHIFT REGISTER BIT LOCATION
(Continued)
10
IF Powerdown
RF Phase Detector
Polarity
0
0
1
•
Data Field
12
Description
Description
9
0
0
1
•
o
11
44
RF, and TRI-STATE ID
RF R_CNTR[14:0]
RF R_CNTR[14:0]
8
0
0
1
•
10
9
7
0
0
1
•
o
IF bit to set a synchronous or an asynchronous
IF PLL Active
RF VCO Negative
Tuning
Characteristics
8
10136682
6
0
0
1
•
o
7
RF control words, in addition to two bits
5
0
0
1
•
0
0
6
4
0
0
1
•
5
Function
Function
RF R[2:16]
4
3
0
0
1
•
RF R[17]
IF PLL Powerdown
RF VCO Positive
Tuning
Characteristics
Least Significant Bit
3
2
0
1
1
•
2
1
1
IF N[21]
1
1
0
1
•
Address
1
1
Field
0
1
0
1
•
0
0