- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44574 > LMX2354SLDX (NATIONAL SEMICONDUCTOR CORP) PLL FREQUENCY SYNTHESIZER, 2500 MHz, CQCC24 PDF資料下載
參數(shù)資料
| 型號： | LMX2354SLDX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 2500 MHz, CQCC24 |
| 封裝： | LAMINATE, CSP-24 |
| 文件頁數(shù)： | 11/26頁 |
| 文件大?。?/td> | 453K |
| 代理商： | LMX2354SLDX |
Programming Description (Continued)
5.3 QUADRATURE MODULUS PRESCALER
The LMX2354 contains a quadrature modulus prescaler, consisting of a prescaler, A counter, B counter and C counter. Once the
N value is known, the A, B, and C values can be calculated by:
C = N div P
B=(N–C
P) div 4
A = N mod 4
For the divide ratio to be legal, it is also required:
C> =max {A, B} + 2
fvco = [N + F] x [fosc/R]
N=P
C+4B+ A
F:
Fractional ratio (contents of FRAC_CNTR divided by the fractional modulus)
f
vco: Output frequency of external voltage controlled oscillator (VCO)
C:
Preset value of the C counter
B:
Preset value of the B counter
A:
Preset value of the A counter
f
osc: Output frequency of the external reference frequency oscillator
R:
Preset divide ratio of binary 15-bit programmable reference counter (3 to 32,767)
P:
Preset modulus of quadrature modulus prescaler
8/9/12/13
550 MHz–1.2 GHz
16/17/20/21
1.2 GHz–2.5 GHz
5.4 SERIAL DATA INPUT TIMING
20004803
Note: Data shifted into register on clock rising edge. Data is shifted in MSB first.
TEST CONDITIONS: The Serial Data Input Timing is tested using a symmetrical waveform around VCC/2. The test waveform has an edge rate of 0.6 V/ns
with amplitudes of 2.2V @ VCC=2.7V and 2.6V @ VCC = 5.5V.
LMX2354
www.national.com
19
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2355SLBX | PLL FREQUENCY SYNTHESIZER, 2500 MHz, QCC24 |
| LMX2370SLDX | PLL FREQUENCY SYNTHESIZER, 2500 MHz, QCC24 |
| LMX2370TMX/NOPB | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20 |
| LMX2370TM/NOPB | PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO20 |
| LMX2512LQX0967/NOPB | PLL FREQUENCY SYNTHESIZER, 19.68 MHz, QCC28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2354SLEX | 制造商:Texas Instruments 功能描述: |
| LMX2354TM | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Dual 10MHz to 2500MHz 24-Pin TSSOP Rail 制造商:Texas Instruments 功能描述:2.5GHZ/550MHZ PLL 2354 TSSOP24 制造商:Texas Instruments 功能描述:IC, DUAL FREQ SYNTHESIZER 2.5GHZ 24-TSSOP, PLL Type:Frequency Synthesis, Frequen |
| LMX2354TM | 制造商:Texas Instruments 功能描述:2.5GHZ/550MHZ PLL 2354 TSSOP24 |
| LMX2354TM/NOPB | 功能描述:IC PLATINUM SYNTHESIZER 24TSSOP 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(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2354TMX/NOPB | 功能描述:IC FREQ SYNTH 2.5GHZ 24-TSSOP 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(yīng)商設(shè)備封裝:* 包裝:* |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。