參數(shù)資料
型號(hào)： LMX2354TM/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： PLL合成/DDS/VCOs
英文描述： PLL FREQUENCY SYNTHESIZER, 2500 MHz, PDSO24
封裝： TSSOP-24
文件頁(yè)數(shù)： 11/26頁(yè)
文件大?。?/td> 453K
代理商： LMX2354TM/NOPB
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
LMX2354SLDX PLL FREQUENCY SYNTHESIZER, 2500 MHz, CQCC24
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2354TMX/NOPB 功能描述:IC FREQ SYNTH 2.5GHZ 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)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(shí)鐘 輸出:時(shí)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(wú)/無(wú) 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:*
LMX2355SLB 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer
LMX2355TM 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer
LMX2360 WAF 制造商:Texas Instruments 功能描述:
LMX2360TMX 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*