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參數(shù)資料
| 型號： | LMX2331 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLLatinum⑩低功耗雙頻率合成射頻個人通信 |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 496K |
| 代理商： | LMX2331 |
Functional Description
The simplified block diagram below shows the 22-bit data register, two 15-bit R Counters and the 15- and 18-bit N Counters (in-
termediate 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 4 appropriate latches on the rising edge of LE. The last two bits are the Con-
trol Bits. The DATA is transferred into the counters as follows:
Control Bits
C1
0
0
1
1
DATA Location
C2
0
1
0
1
IF R Counter
RF R Counter
IF N Counter
RF N Counter
PROGRAMMABLE REFERENCE DIVIDERS (IF AND RF R COUNTERS)
If the Control Bits are 00 or 01 (00 for IF and 01 for RF) 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.
15-BIT PROGRAMMABLE REFERENCE DIVIDER RATIO (R COUNTER)
Divide
Ratio
3
4
32767
R
R
R
R
R
R
R
9
0
0
1
R
8
0
0
1
R
7
0
0
1
R
6
0
0
1
R
5
0
0
1
R
4
0
0
1
R
3
0
1
1
R
2
1
0
1
R
1
1
0
1
15 14 13 12 11 10
0
0
0
0
0
0
1
1
1
0
0
1
0
0
1
0
0
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.
DS012806-6
DS012806-7
www.national.com
12
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| LMX2331LTM | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2331LSLB | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2335UTMX | PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2335USLBX | PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2335UTM | PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2331 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2331A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
| LMX2331ATM | 制造商:Texas Instruments 功能描述: |
| LMX2331ATMX | 功能描述:IC FREQ SYNTH DUAL 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設備封裝:* 包裝:* |
| LMX2331L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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