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NE555 Precision Timer IC - 8-Pin DIP

Specification	Details
Supply Voltage (Vcc)	4.5V to 16V DC
Output Current	Can source or sink up to 200mA
Timing Range	Microseconds to Hours
Temperature Stability	0.005% per °C
Package Type	DIP-8 (Through-hole)
Operating Temp	0°C to 70°C
Trigger Voltage	1/3 of Vcc

Price

🚚 Ships within 24 Hours
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₹ 8.47

(Tax included)

Barcode: 8484823

Product Description

The NE555 IC is engineered for high-precision timing applications. It consists of 25 transistors, 2 diodes, and 15 resistors on a single silicon chip. Its output is capable of driving TTL circuits or high-current loads like small relays and buzzers directly. One of its greatest strengths is its voltage independence; the timing interval is determined by an external resistor and capacitor network ($R-C$ network), and the timing remains remarkably stable even if the supply voltage fluctuates.

Key Features

Multiple Operating Modes: Functions as a pulse generator, delay timer, or a simple flip-flop.
High Output Drive: Supports up to 200mA, allowing it to drive many components without an additional transistor.
Adjustable Duty Cycle: By varying the external resistor values, you can precisely control the "ON" vs. "OFF" time of the output signal.
Wide Voltage Range: Works perfectly with common 5V microcontrollers as well as 9V or 12V battery systems.
Industry Standard: Compatible with almost every electronics tutorial and simulation software globally.

Technical Details

Trigger Requirements: Triggered when the voltage at Pin 2 drops below 1/3 of Vcc.
Threshold Requirements: Resets the timing cycle when Pin 6 exceeds 2/3 of Vcc.
Pinout: 1-GND, 2-Trigger, 3-Output, 4-Reset, 5-Control, 6-Threshold, 7-Discharge, 8-Vcc.

Prototyping and Engineering Tips from Robogears

Bypass Capacitor: Always place a 0.1uF ceramic capacitor between Pin 5 (Control) and Ground. This stabilizes the internal voltage divider and prevents "false triggering" caused by electrical noise on your power rails.
The "Magic" Formula: For Astable mode (flashing), the frequency is calculated
Use a 10kΩ potentiometer for $R_2$ to create a variable-speed flasher or motor controller.
Current Spikes: The 555 IC creates a small "shoot-through" current spike during switching. To protect sensitive microcontrollers sharing the same power supply, add a 10uF to 100uF electrolytic capacitor across the IC's Vcc (Pin 8) and GND (Pin 1).
CMOS vs. Bipolar: This is the standard Bipolar version. If you are building a low-power, battery-only device, you might want to look for the TLC555 (CMOS version), which draws significantly less idle current but has a lower output drive.

Package Includes

1 x NE555 Precision Timer IC (8-Pin DIP)

Disclaimer

Ensure the power supply does not exceed 16V. Prolonged operation at maximum current (200mA) without a small heat sink or proper ventilation can lead to thermal failure.