SE555D

Programmable Timers And Oscillators Overview

The SE555D is a precision timer integrated circuit manufactured by Texas Instruments, belonging to the SE555 series. It operates within a supply voltage range of 4.5 V to 18 V and supports a maximum output frequency of 0.5 GHz. The device features TTL-compatible outputs capable of sourcing or sinking up to 200 mA of current. It is housed in an 8-SOIC package with a small outline form factor. The component is designed for industrial temperature ranges, functioning reliably between -55 °C and +125 °C. It contains one internal timer and consumes approximately 4 mA of operating supply current.

Programmable Timers And Oscillators Feature Summary

• Industrial-grade temperature range from -55 °C to +125 °C
• High drive capability with 200 mA sink/source output current
• Wide supply voltage operation from 4.5 V to 18 V
• TTL-compatible digital output interface

Programmable Timers And Oscillators Applications

• Precision timing circuits requiring wide temperature stability
• Pulse generation and waveform shaping applications
• Timing delays and pulse width modulation systems
• Logic clock signal generation

Programmable Timers And Oscillators Part Context

The SE555D is part of the NE555/SA555/SE555 family of precision timers. While electrically similar to the commercial NE555, the SE555 variant is specified for extended industrial temperature ranges (-55 °C to +125 °C) compared to the standard 0 °C to 70 °C range. This makes it suitable for harsher environments where commercial grade components would fail. The 'D' suffix indicates the SOIC-8 surface mount package.

Programmable Timers And Oscillators Replacement Considerations

For direct pin-to-pin replacement in industrial applications, the SA555DR offers similar functionality but with a limited commercial temperature range (-40 °C to +85 °C). For broader compatibility across all temperature grades, the NE555DR serves as a common alternative, though its lower temperature rating must be verified against system requirements.