LMC555CMX

Programmable Timers And Oscillators Overview

The LMC555CMX is a single CMOS timer integrated circuit manufactured by Texas Instruments, belonging to the LMC555 series. It operates within a supply voltage range of 1.5 V to 15 V and supports frequencies up to 3 MHz. The device features a maximum propagation delay of 100 ns and draws a typical operating supply current of 50 µA. It provides a high-level output current of 50 mA and a low-level output current of -10 mA. Packaged in an 8-SOIC surface-mount format, it functions as a standard 555-type timer with TTL and CMOS logic compatibility.

Programmable Timers And Oscillators Feature Summary

• Low power consumption with 50 µA operating supply current
• High-speed operation supporting frequencies up to 3 MHz
• Wide supply voltage range from 1.5 V to 15 V
• TTL and CMOS logic compatible outputs

Programmable Timers And Oscillators Applications

• Precision timing circuits
• Pulse generation applications
• Logic clock signals
• Time delay generation

Programmable Timers And Oscillators Procurement Notes

Verify the presence of the NOPB suffix when sourcing, as LMC555CMX/NOPB is the active RoHS-compliant designation. Confirm package type is SOIC-8. Check for End-of-Life status on older manufacturing runs. Ensure purchase from authorized distributors to avoid counterfeit components bearing legacy National Semiconductor logos.

Programmable Timers And Oscillators Selection Notes

Select this component for designs requiring low quiescent current compared to bipolar 555 timers. The 1.5 V minimum supply voltage enables battery-operated applications. Verify that the 8-SOIC package dimensions fit the PCB footprint. Consider the LMC555CMM variant if a smaller VSSOP-8 package is required instead of the standard SOIC-8.

Programmable Timers And Oscillators Part Context

The LMC555CMX is the tape-and-reel version of the LMC555CM tube-packaged timer. Both are part of the LMC555 family, which offers improved performance over the legacy LM555. The LMC555CMX has been succeeded or supplemented by the LMC555CMX/NOPB designation to indicate compliance with specific environmental standards.

Programmable Timers And Oscillators Replacement Considerations

LMC555CMX/NOPB is the direct RoHS-compliant equivalent. For pin-compatible alternatives, consider the NE555DR, though it lacks the low-power CMOS characteristics.