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參數資料
| 型號： | LMX2315 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Frequency Synthesizer for RF Personal Communications |
| 中文描述： | 頻率合成射頻個人通信 |
| 文件頁數： | 10/22頁 |
| 文件大?。?/td> | 409K |
| 代理商： | LMX2315 |
Functional Description
The simplified block diagram below shows the 19-bit data register, the 14-bit R Counter and the S Latch, and the 18-bit
N Counter (intermediate latches are not shown). The data stream is clocked (on the rising edge) into the DATA input, MSB first.
If the Control Bit (last bit input) is HIGH, the DATA is transferred into the R Counter (programmable reference divider) and the
S Latch (prescaler select: LMX2315 and LMX2320: 64/65 or 128/129; LMX2325 32/33 or 64/65). If the Control Bit (LSB) is
LOW, the DATA is transferred into the N Counter (programmable divider).
TL/W/12339–18
PROGRAMMABLE REFERENCE DIVIDER (R COUNTER) AND PRESCALER SELECT (S LATCH)
If the Control Bit (last bit shifted into the Data Register) is HIGH, data is transferred from the 19-bit shift register into a 14-bit
latch (which sets the 14-bit R Counter) and the 1-bit S Latch (S15, which sets the prescaler: 64/65 or 128/129 for the
LMX2315/20 or 32/33 or 64/65 for the LMX2325). Serial data format is shown below.
TL/W/12339–6
14-BIT PROGRAMMABLE REFERENCE DIVIDER RATIO
(R COUNTER)
Divide
Ratio
R
14
S
13
S
12
S
11
S
10
S
S
9
S
8
S
7
S
6
S
5
S
4
S
3
S
2
S
1
3
0
0
0
0
0
0
0
0
0
0
0
0
1
1
4
#
0
#
0
#
0
#
0
#
0
#
0
#
0
#
0
#
0
#
0
#
0
#
1
#
0
#
0
#
16383
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Notes:
Divide ratios less than 3 are prohibited.
Divide ratio: 3 to 16383
S1 to S14: These bits select the divide ratio of the programmable
reference divider.
C: Control bit (set to HIGH level to load R counter and S Latch)
Data is shifted in MSB first.
Prescaler Select
15
S
LMX2315/20
LMX2325
128/129
64/65
0
64/65
32/33
1
http://www.national.com
10
相關PDF資料 |
PDF描述 |
|---|---|
| LMX2315TM | Frequency Synthesizer for RF Personal Communications |
| LMX2315TMX | Frequency Synthesizer for RF Personal Communications |
| LMX2316 | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316TMX | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316TM | PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX2315D WAF | 制造商:Texas Instruments 功能描述: |
| LMX2315TM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.2 GHz Frequency Synthesizer for RF Personal Communications |
| LMX2315TMX | 功能描述:IC FREQ SYNTH 2.5GHZ 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: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:* |
| LMX2316 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316LBX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FREQUENCY SYNTHESIZER|BICMOS|LLCC|16PIN|PLASTIC |
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