TTL Transistor-Transistor Logic, a relatively-high-power IC logic family; TTL logic is rarely used in BEAMbots, but its interface requirements are often used in CMOS IC s. A bipolar technology used for producing logic gates. Positioned in the evolution of logic families after RTL (resistor transistor logic), DTL (diode transistor logic) and before ECL and CMOS.  See also the BEAM From the Ground Up treatment on BEAM and TTL ICs.

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