Four-rail supervisor with programmable thresholds
The LTC2901-2IGN#PBF monitors four independent supply voltages simultaneously, covering the most common board-level rails (e.g., 5V, 3.3V, 2.5V, 1.8V) in a single 16-SSOP package. Sixteen selectable threshold combinations mean the supervisor can be configured for different voltage sets without external resistor dividers — a single BOM line covers multiple rail assignments by changing the threshold-select pin strapping. The active-low, push-pull reset output drives the reset line directly; no external pull-up resistor is needed, which saves a component and simplifies the layout.
A 5 ms minimum reset timeout ensures the downstream processor or FPGA sees a clean power-on delay, long enough to let all rails settle before release.
RoHS3 compliant (2015/863/EU), the part is compatible with lead-free reflow profiles and meets current environmental requirements for commercial and industrial equipment.