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参数资料
| 型号： | LMX2315TMX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | XO, clock |
| 英文描述： | Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO20 |
| 封装： | 0.173 INCH, PLASTIC, TSSOP-20 |
| 文件页数： | 10/22页 |
| 文件大小： | 409K |
| 代理商： | LMX2315TMX |
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2316 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316LBX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FREQUENCY SYNTHESIZER|BICMOS|LLCC|16PIN|PLASTIC |
| LMX2316SLBX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications |
| LMX2316SLBX/NOPB | 功能描述:IC FREQ SYNTH 1.2GHZ 16LAMIN CSP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:PLLatinum™ 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LMX2316TM | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Single 100MHz to 1200MHz 16-Pin TSSOP Rail |
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