參數(shù)資料
型號(hào)： LMX2355TM
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： XO, clock
英文描述： PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer
中文描述： PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO24
封裝： TSSOP-24
文件頁(yè)數(shù)： 18/23頁(yè)
文件大小： 403K
代理商： LMX2355TM
Programming Description
(Continued)
5.2.2 N REGISTER—(8/9/12/13) PRESCALER OPERATING IN FRACTIONAL MODE
(RF_N[6]–RF_N[20])
RF_N_CNTR [14:0]
Divide
Ratio
1–23
24–39
40
41
...
16383
C Word
B Word
A Word
Divide Ratios Less than 24 are impossible since it is required that C
>
=3
Some of these N values are Legal Divide Ratios, some are not
0
0
0
0
0
0
0
0
0
0
.
.
.
.
.
1
1
1
1
1
0
0
.
1
0
0
.
1
0
0
.
1
1
1
.
1
0
0
.
1
1
1
.
1
0
0
0
0
0
0
.
1
0
0
.
1
0
1
.
1
N REGISTER—(16/17/20/21) PRESCALER OPERATING IN FRACTIONAL MODE
(RF_N[6]–RF_N[20])
RF_N_CNTR [14:0]
Divide
Ratio
1–47
48–79
80
81
...
32767
C Word
B Word
A Word
Divide Ratios Less than 48 are impossible since it is required that C
>
=3
Some of these N values are Legal Divide Ratios, some are not
0
0
0
0
0
0
0
0
0
0
.
.
.
.
.
1
1
1
1
1
0
0
.
1
0
0
.
1
0
0
.
1
1
1
.
1
0
0
.
1
1
1
.
1
0
0
0
1
0
0
.
1
0
0
.
1
0
1
.
1
5.2.3 FRACTIONAL MODULUS ACCUMULATOR (FRAC_CNTR)
(RF_N[2]–RF_N[5])
Fractional Ratio (F)
Modulus 15
0
1/15
2/15
14/15
N/A
FRAC_CNTR
Modulus 16
0
1/16
2/16
14/16
15/16
RF_N[5]
0
0
0
1
1
RF_N[4]
0
0
0
1
1
RF_N[3]
0
0
1
1
1
RF_N[2]
0
1
0
0
1
L
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參數(shù)描述
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LMX2364SLEX 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:2.6 GHz PLLatinum Fractional RF Frequency Synthesizer with 850 MHz Integer IF Frequency Synthesizer
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