Updated: 04/26/2017 by Computer Hope

TTL may refer to any of the following:

ttl definition1. Short for Transistor-Transistor Logic, TTL was developed by Texas Instruments in 1965. A TTL is a common digital circuit that the output is derived from two transistors.

2. Short for Time To Live, TTL is a field in the Internet Protocol that specifies how many more hops a packet can travel before that packet is disregarded or returned.

Network terms