7400 series
Overview
Transistor-transistor logic
Transistor–transistor logic is a class of digital circuits built from bipolar junction transistors and resistors. It is called transistor–transistor logic because both the logic gating function and the amplifying function are performed by transistors .TTL is notable for being a widespread...
(TTL) integrated circuit
Integrated circuit
An integrated circuit or monolithic integrated circuit is an electronic circuit manufactured by the patterned diffusion of trace elements into the surface of a thin substrate of semiconductor material...
s are historically important as the first widespread family
Logic family
In computer engineering, a logic family may refer to one of two related concepts. A logic family of monolithic digital integrated circuit devices is a group of electronic logic gates constructed using one of several different designs, usually with compatible logic levels and power supply...
of TTL integrated circuit logic. It was used to build the mini and mainframe computers of the 1960s and 1970s. Several generations of pin-compatible
Pin-compatibility
In electronics, a pin-compatible device, such as a logic integrated circuit , memory module or microprocessor, is one that has the same functions assigned to the same particular pins....
descendants of the original family have since become de-facto standard electronic components.
The 7400 series contains hundreds of devices that provide everything from basic logic gates, flip-flop
Flip-flop (electronics)
In electronics, a flip-flop or latch is a circuit that has two stable states and can be used to store state information. The circuit can be made to change state by signals applied to one or more control inputs and will have one or two outputs. It is the basic storage element in sequential logic...
s, and counters, to special purpose bus transceivers and Arithmetic Logic Units (ALU).
Unanswered Questions
