Window supervisor for 1.8V rails – what the 140ms timeout buys you
The TPS3703A5180DSER is a high-accuracy window supervisor from Texas Instruments, monitoring a single 1.8V supply rail. The active-low open-drain output asserts reset when the monitored voltage drifts outside the window, and holds reset for a minimum of 140ms after the rail returns to tolerance — long enough for downstream FPGAs or MCUs to finish their power-on reset sequence before the core starts executing code. The 1.8V threshold is a direct match for low-voltage core logic in modern SoCs and FPGAs. If your rail is 1.2V or 3.3V, this is the wrong threshold — confirm the BOM rail voltage before ordering. The open-drain output lets multiple supervisors share a common pull-up resistor to a different voltage domain (e.g., 3.3V), which is useful for sequencing multiple rails with a single reset signal.
Availability is confirmed through our sourcing desk — quoted and ordered against your BOM quantity. No stock-holding claim; we source per RFQ.
Package and temperature – small footprint, wide thermal envelope
Housed in a 6-WSON (1.5x1.5 mm) package, the TPS3703A5180DSER fits in tight layouts where board space is at a premium. The 125°C ceiling is the key spec — many simple reset ICs top out at 85°C or 105°C, so this part eliminates a thermal bottleneck in high-temp designs.