LMC555IM/NOPB

Programmable Timers And Oscillators Overview

The LMC555IM/NOPB is a single CMOS timer IC from Texas Instruments, part of the industry-standard 555 series. It provides precise time delay and frequency generation capabilities with significantly lower power consumption than bipolar counterparts. The device operates on a supply voltage range of 1.5V to 15V and supports a maximum stable frequency of 3MHz. Packaged in an 8-SOIC (0.154", 3.90mm wide) surface-mount format, it features low supply current of 150µA and operates within a temperature range of -40°C to 125°C. The output is fully compatible with TTL and CMOS logic families.

Programmable Timers And Oscillators Feature Summary

• CMOS technology enabling low power consumption (150µA typical) and operation down to 1.5V
• Maximum oscillation frequency of 3MHz with high accuracy timing
• Output drive capability of 50mA source and -10mA sink at 5V
• Fully pin-compatible with standard 555 timers for easy upgrades

Programmable Timers And Oscillators Applications

• Precision time delay circuits
• Pulse generation and modulation
• Logic clock sources
• Frequency division circuits

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix 'IM' indicates the industrial temperature grade (-40°C to 125°C) and SOIC-8 package. Confirm RoHS compliance status as indicated by the '/NOPB' designation. Check for recent Product Change Notifications (PCN) regarding manufacturing site or material changes, as historical data shows PCNs related to copper wire revisions and wafer fab sites. Ensure the component status is active before procurement planning.

Programmable Timers And Oscillators Selection Notes

Select this variant over bipolar LM555 equivalents when low quiescent current and wide voltage operation are required. The IM suffix denotes the industrial temperature range; use IC for commercial range if applicable. Ensure the PCB footprint matches the 8-SOIC dimensions (3.90mm width). Verify that the load current requirements do not exceed the 50mA source / -10mA sink limits specified at 5V supply.

Programmable Timers And Oscillators Part Context

This component belongs to the LMC555 family, which represents the CMOS version of the classic 555 timer. Unlike the LM555, the LMC555 utilizes TI's CMOS process to achieve lower power dissipation and higher speed capabilities. The NOPB suffix confirms lead-free and RoHS-compliant construction. Other variants include LMC555CM (commercial temp) and LMC555CTPX (DSBGA package).

Programmable Timers And Oscillators Replacement Considerations

Direct pin-compatible replacements include the LM555CMX/NOPB (bipolar, higher current draw) and LMC555CMX/NOPB (CMOS, commercial temp range). For industrial temperature requirements, ensure the substitute also carries the 'I' suffix or equivalent industrial rating. Verify package compatibility between SOIC-8 variants.