LMC555CN/NOPB

Programmable Timers And Oscillators Overview

The LMC555CN/NOPB is a CMOS single timer from Texas Instruments, part of the industry-standard 555 series. It operates on a supply voltage range of 1.5V to 15V with a typical operating current of 150µA. The device supports a maximum frequency of 3MHz and features propagation delays of approximately 100ns. It provides TTL-compatible outputs with high-level output currents up to 50mA and low-level currents of -10mA. Packaged in an 8-DIP (0.300", 7.62mm) through-hole format, it functions as both a precise time delay generator and an oscillator.

Programmable Timers And Oscillators Feature Summary

• CMOS technology enabling low power consumption (150µA typical) and operation down to 1.5V
• TTL and CMOS logic compatible outputs with 50mA source and 10mA sink capability
• High accuracy timing with minimal power supply current spikes during output transitions
• Pin-compatible with standard bipolar 555 timers for easy upgrades

Programmable Timers And Oscillators Applications

• Precise time delay generation in monostable mode
• Pulse width modulation (PWM) signal generation
• Frequency division circuits
• Logic clock signals for timing systems

Programmable Timers And Oscillators Procurement Notes

Verify the package type matches the required 8-DIP configuration. Confirm the suffix NOPB indicates RoHS compliance. Check for active status as some variants may be discontinued. Ensure the operating temperature range meets system requirements.

Programmable Timers And Oscillators Selection Notes

Select this component when low power consumption is critical compared to bipolar 555 timers. It is suitable for battery-operated devices due to the 1.5V minimum supply voltage. Verify that the 50mA output drive is sufficient for the load; otherwise, consider external buffering.

Programmable Timers And Oscillators Part Context

The LMC555 series represents the CMOS evolution of the classic 555 timer. Unlike bipolar versions, it offers significantly lower quiescent current and wider supply voltage flexibility. The CN/NOPB variant specifically denotes the PDIP-8 package with lead-free/RoHS compliant manufacturing.

Programmable Timers And Oscillators Replacement Considerations

Direct pin-compatible replacements include LM555 (bipolar, higher current draw) and other CMOS 555 timers from various manufacturers. Verify supply voltage ranges and output drive capabilities when substituting.