IQD的CMOS、HCMOS和ACMOS振荡器LFSPXO070975REEL之间的区别
来源：http://www.hneyq.com 作者：亿金电子 2024年03月08
IQD的CMOS、HCMOS和ACMOS振荡器LFSPXO070975REEL之间的区别
CMOS与HCMOS与ACMOS–振荡器的历史教训
本博客旨在揭开石英晶体振荡器技术的秘密，阐明CMOS、HCMOS和ACMOS之间的区别，揭示使它们在电子电路世界中各具特色的独特特征。
CMOS（互补金属氧化物半导体）最早出现于1963年，基本上取代了TTL技术（晶体管晶体管逻辑）。TTL逻辑的问题在于，保持线路高电平需要功耗。而CMOS石英晶振实际上不使用功率来保持高或低状态（尽管其操作较慢）；相反，在状态之间切换时会消耗功率。在振荡器中，输出在半个周期内为高电平，在另一半周期内为低电平，这意味着在任何1秒钟内，输出只有0.5秒为高电平。实际上，输出在每个时钟周期从高到低切换两次，这意味着26MHz振荡器每秒切换4200万次。
到20世纪90年代，CMOS已经取代TTL成为最常见的逻辑形式，显然TTL即将过时。在通往主导地位的旅程中，CMOS有源晶振经历了几次迭代。首先是高速版本的HCMOS和高级版本的ACMOS。此外，回到90年代，最常见的电源电压仍然是5V，但3.3V是新的未来（有点像今天的1.8V），这不可避免地导致了低压CMOS、LVCMOS的出现。
当时，区分这些不同类型的CMOS贴片振荡器非常重要，因为它们都具有不同的电压电平、不同的开关速度，并且可以驱动不同数量的功率到下一个器件的输入端。因此，设计工程师必须将振荡器的输出与产品下一级的输入相匹配。谢天谢地，现在世界变得简单了。一切都是兼容的，它们都可以被归类为CMOS区分所有不同的选项不再有帮助。出于这个原因，我们只说“CMOS输出”，以避免任何混淆。
当然，如果CMOS是唯一的输出选项，生活将会很简单……然而，也存在替代方案:对于单输出振荡器，这包括:限幅正弦波或正弦波；对于双输出振荡器：LVPECL、LVDS或偶尔HSCL差分晶振。
IQD的CMOS、HCMOS和ACMOS振荡器LFSPXO070975REEL之间的区别
CMOS vs HCMOS vs ACMOS – A History Lesson in Oscillators
CMOS (Complementary Metal Oxide Semiconductor) first came about in 1963, and essentially replaced TTL Technology (Transistor Transistor Logic). The problem with TTL Logic was that it took power to hold a line high. Whereas CMOS uses virtually no power to hold a high or low state (although it is slower to operate); power is instead consumed when switching between the states. In an oscillator, the output is high for half the cycle and low for the other half, meaning for any 1 second, it is high for only 0.5 seconds. In reality, the output switches from high to low and back twice for every clock cycle, that means a 26MHz oscillator switches 42million times a second.
By the 1990’s CMOS had replaced TTL as the most common form of logic and TTL was obviously going to become obsolete. Along the journey to its dominance, CMOS went through a few iterations. Firstly, HCMOS, the High Speed version, and ACMOS, the Advance version. Additionally, back in the 90’s the most common supply voltage was still 5V, but 3.3V was the new future (a bit like 1.8V is today), and this inevitably led to Low Voltage CMOS, LVCMOS.
Back then, it was important to differentiate between these different CMOS types because they all had different voltage levels, different switching speeds, and they could drive different amounts of power to the input of the next device. Therefore, a design engineer had to match the output of an oscillator to the input of the next stage of their product. Thankfully, the world is simpler now. Everything is compatible and they can all be classed as just CMOS; It’s no longer helpful to differentiate between all the different options. For that reason we just say “CMOS output” and avoid any confusion.
Of course, life would be simple if CMOS was the only output option… However, alternatives to exist: for single output oscillators this includes: clipped sine wave or sine wave, and for dual output oscillators: LVPECL, LVDS or occasionally HSCL
| 进口晶振 | 型号 | 频率 | 频率稳定性 | 电压 |
| LFSPXO064535REEL | IQXO-642 | 4.0MHz | ±30ppm | 1.8V |
| LFSPXO065833REEL | IQXO-640 | 8.0MHz | ±50ppm | 3.3V |
| LFSPXO070969REEL | IQXO-642 | 8.0MHz | ±50ppm | 1.8V |
| LFSPXO072774CUTT | IQXO-640 | 10.0MHz | ±50ppm | 3.3V |
| LFSPXO072774REEL | IQXO-640 | 10.0MHz | ±50ppm | 3.3V |
| LFSPXO059847CUTT | IQXO-640 | 12.0MHz | ±50ppm | 3.3V |
| LFSPXO059847REEL | IQXO-640 | 12.0MHz | ±50ppm | 3.3V |
| LFSPXO073768REEL | IQXO-642 | 12.0MHz | ±50ppm | 1.8V |
| LFSPXO066574CUTT | IQXO-640 | 20.0MHz | ±50ppm | 3.3V |
| LFSPXO066585REEL | IQXO-642 | 20.0MHz | ±50ppm | 1.8V |
| LFSPXO059848CUTT | IQXO-640 | 24.0MHz | ±50ppm | 3.3V |
| LFSPXO059848REEL | IQXO-640 | 24.0MHz | ±50ppm | 3.3V |
| LFSPXO066580CUTT | IQXO-642 | 24.0MHz | ±50ppm | 1.8V |
| LFSPXO073783REEL | IQXO-640 | 24.0MHz | ±30ppm | 3.3V |
| LFSPXO082137REEL | IQXO-642 | 24.0MHz | ±25ppm | 1.8V |
| LFSPXO059400REEL | IQXO-640 | 25.0MHz | ±50ppm | 3.3V |
| LFSPXO070975REEL | IQXO-642 | 25.0MHz | ±50ppm | 1.8V |
| LFSPXO073775REEL | IQXO-642 | 27.0MHz | ±50ppm | 1.8V |
| LFSPXO070959CUTT | IQXO-640 | 32.0MHz | ±50ppm | 3.3V |
| LFSPXO070982REEL | 贴片晶振 | 32.0MHz | ±50ppm | 1.8V |
| LFSPXO079160REEL | IQXO-640 | 32.0MHz | ±30ppm | 3.3V |
| LFSPXO065835REEL | IQXO-640 | 40.0MHz | ±50ppm | 3.3V |
| LFSPXO066581REEL | IQXO-642 | 40.0MHz | ±50ppm | 1.8V |
| LFSPXO070985REEL | IQXO-642 | 48.0MHz | ±50ppm | 1.8V |
| LFSPXO066575REEL | IQXO-640 | 50.0MHz | ±50ppm | 3.3V |
| LFSPXO066583CUTT | IQXO-642 | 50.0MHz | ±50ppm | 1.8V |
| LFSPXO066583REEL | IQXO-642 | 50.0MHz | ±50ppm | 1.8V |
| LFSPXO058071CUTT | IQXO-540 | 3.0MHz | ±50ppm | 3.3V |
| LFSPXO082146CUTT | IQXO-540 | 4.0MHz | ±25ppm | 3.3V |
| LFSPXO082164RL3K | IQXO-542 | 4.0MHz | ±25ppm | 1.8V |
| LFSPXO068241CUTT | IQXO-540 | 7.3728MHz | ±50ppm | 3.3V |
| LFSPXO068242CUTT | IQXO-540 | 8.0MHz | ±50ppm | 3.3V |
| LFSPXO068242REEL | IQXO-540 | 8.0MHz | ±50ppm | 3.3V |
| LFSPXO068242RL3K | IQXO-540 | 8.0MHz | ±50ppm | 3.3V |
| LFSPXO082147RL3K | IQXO-540 | 8.0MHz | ±25ppm | 3.3V |
| LFSPXO082166RL3K | IQXO-542 | 8.0MHz | ±25ppm | 1.8V |
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