NE555N

Overview

The onsemi NE555N is a monolithic timing integrated circuit housed in an 8-pin DIP package. It functions as a highly stable controller for generating accurate time delays or oscillations. The device operates within a supply voltage range of 4.5V to 16V and supports a maximum operating frequency exceeding 500 kHz. It features a high-current output structure capable of sourcing or sinking up to 200 mA, allowing direct drive capabilities for relays, lamps, and LEDs without additional buffering.

Feature Summary

• High output current capability of 200 mA
• Operating frequency greater than 500 kHz
• TTL compatible logic levels
• Adjustable duty cycle in astable mode

Applications

• Precision timing circuits
• Pulse generation and width modulation
• Sequential timing control
• Time delay generation

Part Context

The NE555N belongs to the standard 555 timer family, widely recognized for its versatility in analog and digital applications. While originally developed by Signetics, the part number is utilized across multiple manufacturers including onsemi. This specific variant maintains pin compatibility with legacy designs while offering modern manufacturing standards.

Replacement Considerations

Compatible replacements include the LM555, SE555, and TLC555. When substituting, verify that the alternative meets the required output current specifications (200 mA) and supply voltage range (4.5V–16V). CMOS variants like the TLC555 offer lower quiescent current but may have different drive capabilities.