LM556CMX

Programmable Timers And Oscillators Overview

The LM556CMX is a dual monolithic timing circuit manufactured by Texas Instruments, housed in a 14-pin Small Outline Integrated Circuit (SOIC) package. It integrates two independent 555-type timers within a single device, sharing only the VCC and ground connections. The component operates on a supply voltage ranging from 4.5V to 16V. Each timer section draws a typical supply current of 3mA at 5V and 6mA at 15V. The output structure supports high drive capabilities, capable of sourcing or sinking up to 200mA. The device functions in both astable and monostable modes with temperature stability better than 0.005% per degree Celsius.

Programmable Timers And Oscillators Feature Summary

• Dual Timer Integration: Combines two independent 555 timers in one 14-SOIC package.
• High Output Drive: Outputs can source or sink 200mA.
• Wide Supply Range: Operates effectively between 4.5V and 16V.
• TTL Compatibility: Output and supply are compatible with TTL logic levels.

Programmable Timers And Oscillators Applications

• Precision Timing
• Sequential Timing
• Time Delay Generation
• Pulse Width Modulation

Programmable Timers And Oscillators Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm the media transport format. The 'MX' designation indicates tape and reel packaging containing 2,500 units. Confirm that the component version matches the required RoHS compliance status for the intended assembly process.

Programmable Timers And Oscillators Selection Notes

Select this component when space constraints require replacing two separate 555 timers with a single dual-timer IC. Ensure the application requires a supply voltage between 4.5V and 16V. Verify that the load current does not exceed the 200mA sink/source capability of the discharge transistors and outputs.

Programmable Timers And Oscillators Part Context

This part belongs to the LM556 series, which serves as a direct replacement for the SE556/NE556 dual timer family. The LM556CMX variant specifically denotes the surface-mount SOIC-14 package configuration supplied in tape and reel format for automated manufacturing processes.

Programmable Timers And Oscillators Replacement Considerations

LM556CN

Programmable Timers And Oscillators FAQ

How do the two timers in the LM556 operate?

The two timers operate independently of each other, sharing only the VCC power supply and ground connections.

What is the maximum output current capability?

The output structures are capable of sourcing or sinking up to 200mA.

Can the LM556CMX be triggered and reset?

Yes, the circuits may be triggered and reset on falling waveforms.