LM556CM/NOPB

Programmable Timers And Oscillators Overview

The LM556CM/NOPB is a dual timer integrated circuit manufactured by Texas Instruments, housed in a 14-pin SOIC package. It integrates two independent 555 timers within a single chip, sharing common power and ground connections while operating independently. The device supports astable and monostable modes, providing precise time delays or oscillations with timing ranges from microseconds to hours. It features TTL-compatible outputs capable of sourcing or sinking 200 mA of current. The component operates within a temperature range of 0°C to 70°C and offers high stability with temperature drift better than 0.005%/°C.

Programmable Timers And Oscillators Feature Summary

• Dual Timer Architecture: Contains two independent 555 timers in a single 14-SOIC package, replacing two separate chips.
• High Current Output: Outputs can source or sink up to 200 mA, compatible with TTL logic levels.
• Flexible Timing Modes: Supports both astable (oscillator) and monostable (one-shot) configurations.
• Temperature Stability: Maintains timing accuracy with temperature drift specified at less than 0.005%/°C.

Programmable Timers And Oscillators Applications

• Precision timing circuits and pulse generation
• Time delay applications
• Frequency division circuits
• Pulse width modulation (PWM)
• Gate timers

Programmable Timers And Oscillators Procurement Notes

Verify the suffix /NOPB indicates lead-free packaging compliant with RoHS standards. Confirm the 'C' designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure the package type matches the required 14-SOIC footprint for PCB layout compatibility.

Programmable Timers And Oscillators Selection Notes

Select this component when space savings are critical compared to using two discrete 555 timers. It is suitable for designs requiring moderate output drive capability (200 mA). For applications needing lower power consumption or wider temperature ranges, consider CMOS alternatives like the LMC556 series.

Programmable Timers And Oscillators Part Context

The LM556 is part of the standard 555 timer family, originally developed by National Semiconductor and now produced by Texas Instruments following their acquisition. The LM556CM/NOPB is the commercial-grade, lead-free version of the LM556CM, maintaining pin compatibility with legacy NE556 equivalents.

Programmable Timers And Oscillators Replacement Considerations

Direct pin-compatible substitutes include the NE556 and SE556 series. For low-power requirements, the LMC556CM/NOPB serves as a CMOS alternative. Verify voltage and current specifications match when substituting with generic 556 clones.