參數(shù)資料
型號(hào): LMX2335LMX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, 1100 MHz, PDSO16
封裝: 0.150 INCH, PLASTIC, SOP-16
文件頁數(shù): 4/24頁
文件大?。?/td> 631K
代理商: LMX2335LMX
Functional Description
The simplified block diagram below shows the 22-bit data register, two 15-bit R Counters and two 18-bit N Counters (intermediate
latches are not shown). The data stream is clocked (on the rising edge of Clock) into the DATA register, MSB first. The data stored
in the shift register is loaded into one of the 4 appropriate latches on the rising edge of LE. The last two bits are the Control Bits.
The DATA is transferred into the counters as follows:
Control Bits
DATA Location
C1
C2
0
RF2 R Counter
0
1
RF1 R Counter
1
0
RF2 N Counter
1
RF1 N Counter
01280705
PROGRAMMABLE REFERENCE DIVIDERS (RF1 AND RF2 R COUNTERS)
If the Control Bits are 00 or 01 (00 for RF2 and 01 for RF1) data is transferred from the 22-bit shift register into a latch which sets
the 15-bit R Counter. Serial data format is shown below.
01280706
15-BIT PROGRAMMABLE REFERENCE DIVIDER RATIO (R COUNTER)
Divide
RRRRRRRRRRRRRR
R
Ratio
15 14 13 12 11 10
98765432
1
3
00000000000001
1
4
00000000000010
0
32767
11111111111111
1
Notes:
Divide ratios less than 3 are prohibited.
Divide ratio: 3 to 32767
R1 to R15: These bits select the divide ratio of the programmable reference divider.
Data is shifted in MSB first.
LMX2335L/LMX2336L
www.national.com
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