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  2. 555 timer IC - Wikipedia

    en.wikipedia.org/wiki/555_timer_IC

    The value for Signetics NE558 is an estimate because NE558 datasheets don't state I q at 5 V. [2] The value listed in this table was estimated by comparing the 5 V to 15 V ratio of other bipolar datasheets, then derating the 15 V parameter for the NE558 part, which is denoted by the "*". For the "Frequency max."

  3. Hitachi HD44780 LCD controller - Wikipedia

    en.wikipedia.org/wiki/Hitachi_HD44780_LCD_controller

    The data sheet indicates that for a resistor of 91 kΩ at V CC =5 V the oscillator can vary between 190 kHz and 350 kHz resulting in wait times of 52.6 μs and 28.6 μs instead of 37 μs. If a display with the recommended 91 kΩ resistor is powered from 3.3 volts the oscillator will run much slower.

  4. 16550 UART - Wikipedia

    en.wikipedia.org/wiki/16550_UART

    Exar 16550. The 16550 UART (universal asynchronous receiver-transmitter) is an integrated circuit designed for implementing the interface for serial communications.The corrected -A version was released in 1987 by National Semiconductor. [1]

  5. Integrated circuit - Wikipedia

    en.wikipedia.org/wiki/Integrated_circuit

    A microscope image of an integrated circuit die used to control LCDs.The pinouts are the dark circles surrounding the integrated circuit.. An integrated circuit (IC), also known as a microchip or simply chip, is a set of electronic circuits, consisting of various electronic components (such as transistors, resistors, and capacitors) and their interconnections. [1]

  6. File:NE556 pennen.svg - Wikipedia

    en.wikipedia.org/wiki/File:NE556_pennen.svg

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...