LMC555CN

Programmable Timers And Oscillators Overview

The LMC555CN is a CMOS version of the industry-standard 555 series general-purpose timer manufactured by Texas Instruments. It provides accurate time delay and frequency generation capabilities with significantly lower power dissipation and supply current spikes compared to bipolar counterparts. The device operates on a single power supply ranging from 1.5V to 15V. In monostable mode, timing is controlled by one external resistor and capacitor; in astable mode, frequency and duty cycle are set by two resistors and one capacitor. It features pin-for-pin compatibility with the standard 555 series timers.

Programmable Timers And Oscillators Feature Summary

• Industry's fastest astable frequency of 3 MHz
• Low power consumption with typical dissipation less than 1 mW at 5 V supply
• Output fully compatible with TTL and CMOS logic at 5 V supply
• Pin-for-pin compatible with the 555 series of timers

Programmable Timers And Oscillators Applications

• Precise time delay generation
• Pulse generation circuits
• Logic clock sources
• Time division counters

Programmable Timers And Oscillators Part Context

The LMC555CN belongs to the LMC555 family, which utilizes TI's LMCMOS process to extend frequency range and low supply capability. While the LMC555 is available in various packages including SOIC, VSSOP, and DSBGA, the CN suffix specifically denotes the PDIP (Plastic Dual-In-Line) package variant. This family serves as a low-power alternative to the traditional LM555 timer.

Programmable Timers And Oscillators Replacement Considerations

The LMC555CN is pin-compatible with other 555-series timers such as the LM555 and NE555. Designers should verify that the replacement component meets the specific voltage and current requirements, noting that CMOS variants like the LMC555 offer lower quiescent current but may have different output drive characteristics compared to bipolar versions.