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參數資料
| 型號： | LMX2301TM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 160 MHz, PDSO20 |
| 封裝： | 0.173 INCH, PLASTIC, TSSOP-20 |
| 文件頁數： | 7/14頁 |
| 文件大?。?/td> | 225K |
| 代理商： | LMX2301TM |
Functional Description
(Continued)
PROGRAMMABLE DIVIDER (N COUNTER)
The N counter consists of the 11-bit programmable counter. If the Control Bit (last bit shifted into the Data Register) is LOW,
data is transferred from the 19-bit shift register into an 11-bit latch, which sets the 11-bit programmable Counter. Serial data
format is shown below.
TL/W/12458–15
Note:
R8 to R18: Programmable counter divide ratio control bits (3 to 2047)
7 LSB BITS OF N REGISTER
Divide
Ratio
N
7
N
6
N
5
N
4
N
3
N
2
N
1
X
X
X
X
X
X
X
X
Note:
X
e
Don’t care state
11-BIT PROGRAMMABLE COUNTER DIVIDE RATIO
Divide
Ratio
N
18
N
17
N
16
N
15
N
14
N
13
N
12
N
11
N
10
N
N
9
N
8
3
0
0
0
0
0
0
0
0
0
1
1
4
#
0
#
0
#
0
#
0
#
0
#
0
#
0
#
0
#
1
#
0
#
0
#
2047
1
1
1
1
1
1
1
1
1
1
1
Note:
Divide ratio: 3 to 2047 (Divide ratios less than 3 are prohibited)
EQUATION FOR OUTPUT FREQUENCY
DETERMINATION
f
VCO
e
[
N
]
c
f
OSC
/R
f
VCO
: Output frequency of external voltage controlled oscil-
lator (VCO)
N:
Preset divide ratio of binary 11-bit programmable
counter (3 to 2047)
f
OSC
: Output frequency of the external reference frequency
oscillator
R:
Preset divide ratio of binary 14-bit programmable ref-
erence counter (3 to 16383)
http://www.national.com
7
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX2301TMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications |
| LMX2305 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2305C WAF | 制造商:Texas Instruments 功能描述: |
| LMX2305TM | 制造商:Rochester Electronics LLC 功能描述: |
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