5 555 Timer IC Manufacturers in 2023
This section provides an overview for 555 timer ics as well as their applications and principles. Also, please take a look at the list of 5 555 timer ic manufacturers and their company rankings.
Table of Contents
What Is a 555 Timer IC?
A 555 timer IC is used as an oscillator in a circuit. It is also used, for example, to display LEDs because it can supply pulses with a fixed cycle.
The XX555 is one of the most popular 555 timer IC, and although the XX part varies by manufacturer, the 555 timer IC is generally well-known to anyone who designs digital circuits.
It is no exaggeration to say that it is the most famous semiconductor today.
Uses of 555 Timer ICs
Oscillator circuits, one of the uses of 555 timer ICs, are used in digital circuits as the main synchronization signal to drive the system. Microcontrollers and system controllers that control systems also use the fixed-cycle signals generated by oscillation circuits as the primary synchronous signals for their own operations.
LED display circuits have a wide range of applications because the display period can be set relatively freely.
In addition, when designing digital circuits, there are often cases where a fixed-period signal with an arbitrary frequency is required. In such cases, 555 timer ICs are very convenient and easily used.
Principle of 555 Timer ICs
The XX555 timer ICs consist of three main types of circuits. These are a window comparator, an RS-flip-flop (RS-FF), and a charge/discharge circuit using C and R. The basic configuration consists of connecting the output of the window comparator to the R and S inputs of the RS-flip-flop, connecting this output (NOT(Q)) to the charge/discharge circuit of C and R through an open collector transistor buffer, and connecting the end of the charge/discharge circuit to the input of the window comparator. The structure is as follows.
In the charge-discharge circuit of C and R, voltage is applied to C. When the charge to C begins and reaches a certain voltage, a window comparator connected to the circuit is activated.
When the voltage reaches a certain level, the output of the window comparator (connected to the R terminal of RS-FF) switches to [H]. In response to this, the NOT (Q) output of the RS-FF also switches to [H], which turns the transistor buffer ON, and as a result, the CR charge/discharge circuit connected to it starts discharging. The output of the window comparator (the side connected to the S terminal of the RS-FF) is switched to [H] by the discharge, and the NOT(Q) output of the RS-FF is switched to [L]. Then, the CR charging/discharging circuit, which has been discharging until now, resumes charging due to the turning off of the transistor buffer.
The repetition of the above operation causes the output of NOT(Q) of RS-FF to invert in a certain cycle. Similarly, Q, the output of XX555, continues to invert the NOT(Q) output.
List of 5 555 Timer IC Manufacturers
*Including some distributors, etc.
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MAKERS Co.
555 Timer IC
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Digi-Key Electronics
555 Timer IC
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HobbyTronics Ltd
555 Timer IC
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BC Robotics Inc.
555 Timer IC
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Sierra IC Inc.
555 Timer IC
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555 Timer IC Manufacturer Ranking
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