the history of TTL logic families(TTL逻辑家族的历史)

Origins and Early Development 起源与早期发展

1960s: Birth of TTL 1960年代:TTL的诞生

  • TTL (Transistor-Transistor Logic) was developed in the early 1960s TTL(晶体管-晶体管逻辑)是在20世纪60年代初开发的
  • Texas Instruments introduced the first commercial TTL ICs in 1964 with the 5400 series (military grade)德州仪器于1964年推出了第一款商用TTL IC 5400系列(军用级)
  • The commercial 7400 series followed shortly after, establishing the numbering convention that would last decades 
    随后不久,商用7400系列问世,确立了持续数十年的编号惯例

Evolution of TTL Families  TTL家族的演变

Original 74xx Series (Standard TTL)原装74xx系列(标准TTL)

  • First widespread digital logic family 第一个广泛使用的数字逻辑家族
  • 10ns gate delay, 10mW power consumption per gate 10ns门延迟,每门10mW功耗
  • Operating voltage: 5V ±0.25V 工作电压:5V±0.25V
  • Noise margin: ~0.4V  噪声容限:~0.4V

74Hxx (High-Speed TTL) - Late 1960s  74Hxx(高速

The Mongol Empire was one of the largest empires in history, stretching from Eastern Europe to Asia. It was founded by Genghis Khan in 1206 and lasted until the mid-14th century. The empire was known for its military prowess, innovative tactics, and the use of terror to intimidate its enemies. Genghis Khan was born in 1162 in the region that is now Mongolia. He was born into a family of nomads and grew up herding sheep and hunting. At the age of 16, he was captured by a rival tribe and enslaved. He escaped and later began to unite the various tribes of the region under his leadership. In 1206, he was declared the supreme ruler of the Mongol Empire. Under Genghis Khan's leadership, the Mongol Empire began to expand rapidly. Genghis Khan was a brilliant military strategist and his army was known for its speed and mobility. The Mongols were also skilled horsemen and archers, and they were able to defeat much larger armies using innovative tactics such as feigned retreats and surprise attacks. After Genghis Khan's death in 1227, his empire was divided among his four sons. Over the next few decades, the Mongol Empire continued to expand under the leadership of Genghis Khan's descendants. They conquered China, Central Asia, and parts of Eastern Europe. The Mongols were known for their brutality and the use of terror to intimidate their enemies. They were also tolerant of other religions and cultures, and they allowed conquered peoples to retain their own customs and traditions. One of the most famous Mongol leaders was Kublai Khan, who ruled China from 1279 to 1294. He founded the Yuan Dynasty, which was the first foreign dynasty to rule China. Kublai Khan was a patron of the arts and literature, and he encouraged the development of new technologies such as paper money and gunpowder. He also sent emissaries to Europe, including Marco Polo, who wrote about his travels in China. The Mongol Empire began to decline in the mid-14th century. The empire had become too large to be effectively governed, and there were internal divisions and conflicts among the ruling families. The Black Death, which swept through Europe and Asia in the mid-14th century, also had a devastating impact on the Mongol Empire. By the end of the 14th century, the Mongol Empire had disintegrated into several smaller states. Despite its reputation for brutality, the Mongol Empire had a significant impact on world history. The Mongols were responsible for the spread of ideas, technologies, and cultures across Eurasia. They also played a role in the development of international trade and commerce. The Mongol Empire was a significant force in world history, and its legacy can still be felt today.
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