Texas Instruments

LM556CMX/NOPB

LM556CMX/NOPB Description

The LM556CMX/NOPB from Texas Instruments is a dual 555-type timer/oscillator IC designed for precision timing and pulse generation applications. Packaged in a 14-SOIC surface-mount form factor, it operates within a 4.5V to 16V supply range and delivers stable performance across a 0°C to 70°C temperature range. With a 10 mA supply current, it balances power efficiency and functionality, making it suitable for battery-powered and low-power systems. The device is RoHS3 compliant and REACH unaffected, ensuring adherence to environmental regulations. Although marked as obsolete, it remains a reliable choice for legacy designs requiring dual-timer functionality.

LM556CMX/NOPB Features

• Dual 555 Timers: Integrates two independent 555 timers in a single package, saving board space and simplifying design.
• Wide Voltage Range (4.5V–16V): Supports flexible power supply configurations, compatible with TTL and CMOS logic levels.
• Low Supply Current (10 mA): Optimized for energy-sensitive applications.
• Surface-Mount (14-SOIC): Ideal for compact PCB layouts and automated assembly processes.
• Stable and Monostable Operation: Configurable for precision timing, pulse generation, and frequency division.
• Robust Compliance: Meets ROHS3 and EAR99 standards, suitable for industrial and commercial use.

LM556CMX/NOPB Applications

The LM556CMX/NOPB excels in scenarios requiring dual timing circuits or synchronized pulse generation, such as:

• Pulse-Width Modulation (PWM) Controllers: For motor speed regulation and LED dimming.
• Precision Oscillators: In clock generation and frequency synthesis circuits.
• Sequential Timing Systems: Used in industrial automation and process control.
• Debounce Circuits: For switch and sensor signal conditioning.
• Legacy Electronics Repair: Replacing older dual-timer ICs in maintenance applications.

Conclusion of LM556CMX/NOPB

The LM556CMX/NOPB offers a cost-effective, space-saving solution for dual-timer needs, combining versatility, low power consumption, and reliable performance. While obsolete, its broad compatibility and ease of integration make it a practical choice for engineers working on retrofit designs or low-complexity timing systems. For new designs, alternative modern equivalents may be preferred, but the LM556 remains a proven performer in its niche.