TLC3555QDRQ1

Programmable Timers And Oscillators Overview

The TLC3555QDRQ1 is an automotive-grade, high-speed CMOS timer from Texas Instruments, qualified under AEC-Q100 Grade 1. It operates on a single supply voltage ranging from 1.5V to 18V and supports astable frequencies up to 3MHz. The device features rail-to-rail CMOS outputs with a sink current of 200mA and a source current of 50mA. Key internal enhancements include integrated thermal shutdown protection, power-on reset functionality, and an internal pullup resistor on the RESET pin. It is housed in an 8-pin SOIC (D) package.

Programmable Timers And Oscillators Feature Summary

• AEC-Q100 qualified for Grade 1 (-40°C to +125°C)
• High-output-current capability: Sink 200mA, Source 50mA
• Integrated thermal shutdown and power-on reset
• Internal RESET pullup resistor to VDD

Programmable Timers And Oscillators Applications

• Automotive lighting systems
• Vehicle instrument clusters
• Telematics units
• Building automation controllers

Programmable Timers And Oscillators Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the specific orderable part number matches the required package style and temperature grade. Ensure design compliance with AEC-Q100 standards if utilized in safety-critical automotive environments.

Programmable Timers And Oscillators Selection Notes

Select this model for applications requiring higher output drive strength compared to standard bipolar timers. Consider the DDF package variant if board space constraints are critical, as it offers reduced parasitics. Evaluate external timing components carefully, as their tolerances often dominate overall circuit accuracy at high frequencies.

Programmable Timers And Oscillators Part Context

This component belongs to the TLC3555-Q1 family, representing a next-generation evolution of the classic 555 timer architecture. It improves upon previous generations like the TLC555 by offering tighter specification tolerances and additional protective features such as thermal shutdown.

Programmable Timers And Oscillators Replacement Considerations

Pin-compatible with the TLC555. When replacing legacy bipolar 555 timers, ensure the sourcing current limit of 50mA is respected, as it is lower than typical bipolar counterparts.