- 您现在的位置：买卖IC网 > PDF目录358886 > LMX2331LSLB (NATIONAL SEMICONDUCTOR CORP) PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications PDF资料下载
参数资料
| 型号： | LMX2331LSLB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | XO, clock |
| 英文描述： | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2000 MHz, QCC24 |
| 封装： | CSP-24 |
| 文件页数： | 14/21页 |
| 文件大小： | 496K |
| 代理商： | LMX2331LSLB |
Functional Description
(Continued)
PROGRAMMABLE MODES
Several modes of operation can be programmed with bits R16–R20 including the phase detector polarity, charge pump
TRI-STATE and the output of the F
LD pin. The prescaler and powerdown modes are selected with bits N19 and N20. The pro-
grammable modes are shown in Table 1 Truth table for the programmable modes and F
o
LD output are shown in Table 2 and
Table 3
TABLE 1. Programmable Modes
C1
0
C2
0
R16
R17
IF I
CPo
R18
IF D
o
R19
IF LD
R20
IF F
o
IF Phase
Detector Polarity
RF Phase
Detector Polarity
TRI-STATE
RF D
o
TRI-STATE
0
1
RF I
CPo
RF LD
RF F
o
C1
1
1
C2
0
1
N19
N20
IF Prescaler
RF Prescaler
Pwdn IF
Pwdn RF
TABLE 2. Mode Select Truth Table
Phase Detector Polarity
(Note 11)
Negative
Positive
D
o
TRI-STATE
(Note 9)
Normal Operation
TRI-STATE
I
CPo
IF
2330L RF
Prescaler
32/33
64/65
2331L/32L RF
Prescaler
64/65
128/129
Pwdn
(Note 9)
Pwrd Up
Pwrd Dn
(Note 10)
LOW
HIGH
Prescaler
8/9
16/17
0
1
Note 9:
Refer to POWERDOWN OPERATION in Functional Description.
Note 10:
The I
CPo
LOW current state = 1/4 x I
CPo
HIGH current.
Note 11:
PHASE DETECTOR POLARITY
Depending upon VCO characteristics, R16 bit should be set accordingly: (see figure right)
When VCO characteristics are positive like (1), R16 should be set HIGH;
When VCO characteristics are negative like (2), R16 should be set LOW.
VCO Characteristics
DS012806-9
www.national.com
14
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| LMX2335U | PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2336 | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2331LSLBX | 制造商:Texas Instruments 功能描述: |
| LMX2331LSLBX/NOPB | 功能描述:IC FREQ SYNTH DUAL 24-LCSP 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:* |
| LMX2331LSLDX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinumTM Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2331LSLDX/NOPB | 功能描述:IC FREQ SYNTH DUAL RF COMM 20CSP 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:* |
| LMX2331LTM | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinumTM Low Power Dual Frequency Synthesizer for RF Personal Communications |
发布紧急采购，3分钟左右您将得到回复。