![]() ![]() The figure depicts interfacing between TTL and CMOS. Output drive current : Asymmetric : High state : 0.4 to 2 mA, Low state : 8 to 20 mA.Binary logic "0" : represented by voltage between 0V and 0.8V, must be less than 0.8Vįollowing are the typical characteristics of TTL logic family. ![]() Binary logic "1" : represented by voltage between 2.4 V and 5 V (i.e.open collector output, Totem pole output and three state or tristate output. There are three different types of output configurations usedīy TTL viz.TTL operates from +5V or 3.3V power supply.It is one of the most common I/O standard.The basic TTL logic circuit is NAND gate which uses BJTs internally. TTL devices are used as "glue logic" which connects more complex devices in TTL family use transistor to perform basic logic operations. This page compares TTL vs LVTTL and mentions difference between TTL and LVTTL with respect to voltage levels, advantages and disadvantages.įirst TTL IC 7400 was developed in 1965 and it was known as "Standard TTL". TTL vs LVTTL | Difference between TTL and LVTTL ![]()
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