NE555DT

Overview

The NE555DT is a single general-purpose timer IC manufactured by STMicroelectronics, housed in an 8-pin SOIC package. It operates within a supply voltage range of 4.5V to 16V and supports frequencies up to 500 kHz. The device features a maximum output current of 200 mA and a typical supply current of 10 mA. Designed for robust performance, it functions reliably across an operating temperature range of 0°C to 70°C. The component is lead-free and RoHS compliant, adhering to standard industrial specifications for timing and oscillation applications.

Feature Summary

• General-purpose single timer with 500 kHz frequency capability
• High output drive strength of 200 mA
• Operates on 4.5V to 16V DC supply
• Available in 8-pin SOIC surface-mount package

Applications

• Timing circuits
• Pulse generation
• Oscillator designs

Procurement Notes

Verify the specific datasheet version from STMicroelectronics to confirm pinout compatibility and electrical limits. Ensure the SOIC-8 package dimensions match the target PCB footprint. Check for lead-free and RoHS compliance status if required by environmental regulations. Confirm the operating temperature range meets the application's thermal requirements.

Selection Notes

Select the NE555DT when a bipolar timer with high output current is needed. Compare against CMOS alternatives like TS555 if lower power consumption is critical, as the NE555 draws higher supply current. Ensure the 70°C maximum operating temperature is sufficient for the intended environment. Verify that the 4.5V minimum supply voltage aligns with the system power rails.

Part Context

This component belongs to the widely used 555 timer family, standardized for monostable and astable operations. STMicroelectronics produces this variant using bipolar technology, distinguishing it from low-power CMOS versions. The 'DT' suffix indicates the specific SOIC-8 surface-mount packaging format offered by the manufacturer.

Replacement Considerations

The TS555 is functionally compatible but offers significantly lower power consumption and higher frequency operation. Direct pin-to-pin replacement is possible, but circuit adjustments may be needed due to differences in supply current and decoupling capacitor requirements between bipolar and CMOS technologies.