Transistor–transistor logic
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Transistor–transistor logic is a logic family built from bipolar junction transistors. Its name signifies that transistors perform both the logic function and the amplifying function, as opposed to ea
A real-time clock built of TTL chips around 1979
A universal asynchronous receiver-transmitter is a peripheral device for asynchronous serial communication in which the data format and transmission speeds are configurable. It sends data bits one by
Transistor–transistor logic
…a one bit A to D converter. TTL serial refers to single-ended serial communication using raw transistor voltage levels: "low" for 0 and "high" for 1. UART over TTL serial is a common debug interface for embedded devices. Handheld devices such as graphing calculators and NMEA 0183-compliant GPS receivers…
Raspberry Pi 2 connected to a laptop through a UART to USB adapter. Three wires are used: one for ground and one for data in each direction. Such a setup can be used to access the command-line interface of the Raspberry Pi running Linux from the host computer .