SA555DR

Programmable Timers And Oscillators Overview

The SA555DR is a single precision timer integrated circuit manufactured by Texas Instruments, belonging to the SA555 series. It operates within a supply voltage range of 4.5V to 16V and supports frequencies up to 100kHz. The device draws 10mA of supply current and functions across an extended temperature range of -40°C to 85°C. Housed in an 8-SOIC surface-mount package with a width of 3.90mm, it provides TTL-compatible output capable of sourcing or sinking 200mA. This component serves as a robust timing solution for industrial applications requiring wide operating conditions.

Programmable Timers And Oscillators Feature Summary

• Single 555-type timer/oscillator IC with 100kHz frequency capability
• Extended industrial temperature range: -40°C to 85°C
• Supply voltage operation from 4.5V to 16V
• High drive output: 200mA source/sink current
• Surface-mount 8-SOIC package (3.90mm width)

Programmable Timers And Oscillators Applications

• Industrial timing circuits requiring wide temperature tolerance
• Precision pulse generation systems
• DC-AC oscillator designs
• Logic timing delays

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm manufacturing origin and material composition changes. The 'G4' suffix typically indicates lead-free status and RoHS compliance, but cross-reference the latest datasheet revision history for any assembly site or packaging material changes documented in Product Change Notices (PCN). Ensure the ordered part matches the required environmental specifications for the target application.

Programmable Timers And Oscillators Selection Notes

Select the SA555DR when an industrial-grade (-40°C to 85°C) 555 timer is required in a surface-mount format. Compare against the NE555DR if commercial grade (0°C to 70°C) is sufficient, noting that the SA555 offers wider thermal performance. Verify that the 8-SOIC footprint aligns with the PCB design constraints and that the 200mA output drive meets the load requirements without external buffering.

Programmable Timers And Oscillators Part Context

The SA555DR is part of Texas Instruments' broader family of precision timers, which includes the NE555 (commercial), SE555 (military), and dual-timer variants like the NE556. The 'SA' prefix denotes the industrial temperature grade variant. It shares functional pinouts with standard 555 timers but is optimized for reliability in harsher environments compared to commercial equivalents.

Programmable Timers And Oscillators Replacement Considerations

Publicly listed substitutes include the MC1455DR2G from onsemi. Verify pin compatibility and electrical parameter alignment, particularly regarding supply voltage ranges and temperature ratings, before substituting.