LM555CN

Programmable Timers And Oscillators Overview

The LM555CN is a single timer integrated circuit manufactured by onsemi, formerly Fairchild Semiconductor. It operates within a supply voltage range of 4.5 V to 16 V and supports an operating temperature range of 0°C to +70°C. The device features a high-current drive capability with a maximum output sink current of 200 mA and a source current of up to 100 mA. Packaged in an 8-lead DIP (JEDEC MS-001) format, it dissipates up to 600 mW. Key electrical characteristics include a timing error drift of 50 ppm/°C in monostable mode and a turn-off time of less than 2 μs.

Programmable Timers And Oscillators Feature Summary

• High-Current Drive Capability: Supports up to 200 mA sink current for direct driving of loads such as relays or LEDs.
• Adjustable Duty Cycle: Allows precise control over pulse width and frequency in astable configurations using external resistors and capacitors.
• Temperature Stability: Maintains timing accuracy with a drift rate of 50 ppm/°C in monostable operation.
• Fast Turn-off Time: Internal discharge transistor turns off in less than 2 μs.

Programmable Timers And Oscillators Applications

• Precision Timing
• Pulse Generation
• Delay Generation
• Sequential Timing

Programmable Timers And Oscillators Procurement Notes

Verify the specific ordering suffix and package type when sourcing, as legacy Fairchild part numbers may have been updated during the integration into ON Semiconductor's system. Confirm that the component meets the required industrial temperature range of 0°C to +70°C for the intended application environment.

Programmable Timers And Oscillators Selection Notes

Select the LM555CN when a through-hole DIP-8 package is required for prototyping or legacy board designs. Ensure the application voltage stays within the 4.5 V to 16 V limit. For surface-mount requirements, consider the LM555CM variant instead. Validate external resistor and capacitor values against the maximum total resistance limits specified for the chosen supply voltage.

Programmable Timers And Oscillators Part Context

The LM555 series is a classic timer IC originally introduced by Signetics. The LM555CN specifically denotes the commercial grade version in an 8-pin dual in-line package. Following the acquisition of Fairchild Semiconductor, this part number is now managed under the ON Semiconductor portfolio, retaining its original pinout and functional specifications.

Programmable Timers And Oscillators Replacement Considerations

Direct pin-compatible replacements include the LM555CM (SOIC-8 package) from the same manufacturer. Other generic 555 timers like the NE555 or SE555 offer similar functionality but may differ in supply voltage ranges or temperature ratings; verify datasheet compatibility before substitution.