555 Timer IC, The IC Time Machine

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There are many type of “The IC Time Machine” – 555 Timer IC, it depends on their manufacturers. For example Philips and Texas Instrument named this device as SE/NE555, National Semiconductor for LM555, Motorola/ON-Semi for MC1455. These devices provide relatively cheap and practical solutions for a variety of applications related to electronic timing (timing).

555 IC Timer PIN Diagram

Even differ from their names but type of 555 Timer IC function and diagram mutually compatible with each other or so called functional and pin-to-pin compatible. Only a few specific characteristic that make them different such power consumption, maximum frequency and etc. They work in three operating modes: monostable, ashtable and bistable/scmitt trigger. Thus, these device can be applied in many purposes such as timers, touch switch, pulse detection, logic clock, security alarm, lamp flashers, bouncefree latched switches, etc.

The picture above showed the PIN diagram among these devices (click to enlarge). The 555 Timer IC is designed that only require a few external components to work, mainly are external resistors and capasitors. They are working with the principle of using the (charging) and drain (discharging) of the capacitor through the external resistor. Below we provide you with 555 Timer IC models/types from various manufacturers.

Manufacturers Models/Types
National Semiconductors LM1455/LM555/LM555C
Motorolla MC1455/MC1555
Texas Instruments SN52555/SN72555, TLC555, NE555
RCA CA555/CA555C
Fairchild Semiconductors NE555/KA555
Philips (ECG) ECG955M
Exar XR-555
Maxim ICM7555
Sylvania NTE955M
STMicroelectronics NE555N/ K3T647
Zetex ZSCT1555
Raytheon RM555/RC555
Haris HA555
Intersil SE555/NE555/ICM7555

(table source: wikipedia.org)

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This entry was posted on Monday, May 25th, 2009 at 11:58 pm and is filed under Power IC. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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    One Response to “555 Timer IC, The IC Time Machine”

    1. Wiring 555 IC as a Square Wave Oscillator for Two LED Flasher Application | DATASHEEToo says:
      August 3, 2009 at 9:17 am

      [...] capacitor 10n 103 (C1), 1 pc electrolytic capacitor 10uF (C2), 2 pcs 5mm re LED for L1 L2, an LM/NE555 IC, a 8 pin IC socket, and a 3138 [...]

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