- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358887 > LMX2542 (National Semiconductor Corporation) PLLatinum Cellular and GPS Frequency Synthesizer System with Integrated VCO PDF資料下載
參數(shù)資料
| 型號： | LMX2542 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum Cellular and GPS Frequency Synthesizer System with Integrated VCO |
| 中文描述： | PLLatinum蜂窩頻率合成器和GPS系統(tǒng)的集成VCO |
| 文件頁數(shù)： | 8/22頁 |
| 文件大?。?/td> | 253K |
| 代理商： | LMX2542 |
Electrical Characteristics
(Continued)
V
CC
= V
DD
= CE = 2.8V, T
A
= +25C, unless otherwise specified
Symbol
Parameter
Conditions
Value
Typ
Units
Min
Max
DIGITAL INTERFACE (CE, DATA, CLK, LE, LD)
V
IH
High-Level Input Voltage
0.8 V
DD
0.8 V
CC
0
0
V
DD
V
CC
0.2 V
DD
0.2 V
CC
10
V
V
V
V
μA
μA
pF
V
V
V
V
pF
V
IL
Low-Level Input Voltage
I
IH
I
IL
C
I
V
OH
High-Level Input Current
Low-Level Input Current
Input Capacitance
High-Level Output Voltage
V
IH
= V
DD
= V
CC
V
IL
= 0V
10
3.0
0.9 V
DD
0.9 V
CC
V
OL
Low-Level Output Voltage
0.1 V
DD
0.1 V
CC
5.0
C
O
MICROWIRE INTERFACE
t
CS
t
CH
t
CWH
t
CWL
t
ES
t
EW
Output Capacitance
DATA to CLK Set Up Time
DATA to CLK Hold Time
CLK Pulse Width HIGH
CLK Pulse Width LOW
CLK to LE Set Up Time
LE Pulse Width
50.0
10.0
50.0
50.0
50.0
50.0
ns
ns
ns
ns
ns
ns
Note 4:
For other RF frequency ranges, please contact National Semiconductor Corporation.
Note 5:
When the Cellular-CDMAmode is used, an external /2 circuit is required before the Cellular mixer LO port. Furthermore, if an external /1.5 circuit is available
before the GPS mixer LO port, the GPS frequency of 1391.82 MHz can be achieved by using a fixed RF frequency of 2087.73 MHz.
Note 6:
Lock time is defined as the time difference between the beginning of the frequency transition and the point at which the frequency remains within +/- 1 kHz
of the final frequency. t
LOCK
= t
FINAL
t
INITIAL
.
Note 7:
For frequencies other than the default values, the SPI_DEF bit should be set to 0 and registers R4 and R5 programmed appropriately. Refer to
Section
2.2.5
for further details on how to program the SPI_DEF bit.
Note 8:
For other reference oscillator frequencies, please contact National Semiconductor Corporation.
L
www.national.com
8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2604 | Triple-band VCO for GSM900/DCS1800/PCS1900 |
| LMX2604LQ | Triple-band VCO for GSM900/DCS1800/PCS1900 |
| LMX2604LQX | Triple-band VCO for GSM900/DCS1800/PCS1900 |
| LMX321 | Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Op Amps |
| LMX321AXK-T | Single/Dual/Quad, General-Purpose, Low-Voltage, Rail-to-Rail Output Op Amps |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2542LQ2121 | 制造商:Texas Instruments 功能描述:IC PLL + VCO SMD 2542 LLP-28 |
| LMX2542LQ2121/NOPB | 功能描述:IC FREQ SYNTH CELL/GPS 28-LLP RoHS:是 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(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2542LQX2121 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Cellular and GPS Frequency Synthesizer System with Integrated VCO |
| LMX2571EVM | 功能描述:LMX2571 PLLatinum? Series Timing, Frequency Synthesizer Evaluation Board 制造商:texas instruments 系列:PLLatinum?? 零件狀態(tài):有效 主要用途:計時，頻率合成器 嵌入式:- 使用的 IC/零件:LMX2571 主要屬性:帶 VCO 的單路分?jǐn)?shù)-N PLL 輔助屬性:SMA 連接器 所含物品:板 標(biāo)準(zhǔn)包裝:1 |
| LMX2571NJKT | 功能描述:IC FREQ SYNTHESIZER VCO 制造商:texas instruments 系列:PLLatinum?? 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:頻率合成器（RF） PLL:帶旁路 輸入:時鐘，晶體 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:2:2 差分 - 輸入:輸出:是/無 頻率 - 最大值:1.4GHz 分頻器/倍頻器:是/是 電壓 - 電源:3.15 V ~ 3.45 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-WFQFN 裸露焊盤 供應(yīng)商器件封裝:36-WQFN（6x6） 標(biāo)準(zhǔn)包裝:1 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。