Reset Timer with Adjustable Timeout – 6-UDFN Footprint
The STM6524ALARDL6F is a Smart Reset™ timer from STMicroelectronics, delivering a supervised reset signal with an adjustable/selectable timeout period. The active-low, open-drain output pulls low when the monitored condition triggers, and the timeout sets the delay before the output releases — critical for power-on reset sequencing or manual reset debounce. Housed in a 6-UFDFN package (1.6x1.3 mm body), it mounts on the PCB surface and occupies minimal board area — a good fit for handheld or sensor-node designs where space is tight.
Package and Temperature – Design-in Checklist
Package: 6-UDFN (1.6x1.3 mm) — the exposed pad is the thermal and electrical ground plane. Ensure the PCB land pattern matches the ST recommended footprint; the small pitch demands a controlled solder-paste stencil and reflow profile. The output is open drain, so the pull-up resistor value and supply voltage set the sink current and dissipation.
ROHS3 compliant, so it passes current environmental regulations without exemption paperwork. No official second-source or direct cross-reference is listed — the Smart Reset™ series is proprietary to ST.