What the TPS3780ADRYT monitors and where it fits
The TPS3780ADRYT is a 2-channel multi-voltage supervisor from Texas Instruments, designed to monitor two independent supply rails and assert a common active-low reset signal when either falls below its threshold. The open-drain output allows wired-OR connection to other reset sources, which is common in multi-rail FPGA and SoC systems. The voltage threshold is adjustable or selectable via external resistors, giving the designer control over the trip point for each monitored rail without needing a fixed-threshold variant. This flexibility reduces BOM line count when the same supervisor must handle different supply voltages across board revisions. Housed in a 6-SON (1.45x1 mm) package, the part occupies minimal board area — useful in space-constrained designs like portable instrumentation or compact motor drives.
Texas Instruments lists it as ROHS3 compliant. The base product number TPS3780 covers the family; the ADRYT suffix specifies the package and reel option.
Two monitored channels mean a single device replaces two separate reset ICs, saving placement cost and board area. The open-drain output with active-low assertion is compatible with most MCU reset inputs and can be pulled up to any voltage within the absolute maximum rating. The adjustable threshold range is set by external resistor dividers — the datasheet provides recommended values for common rail voltages (1.8 V, 2.5 V, 3.3 V, 5.0 V). This adjustability eliminates the need to stock multiple fixed-threshold supervisor SKUs.