What this sequencer does on your board
The MAX16030TG+T from Analog Devices is a 4-channel voltage sequencer and supervisor in a 24-TQFN (4x4 mm) package. It monitors up to four supply rails and holds the system in reset — active-low, push-pull output — until all voltages are within tolerance and the timeout expires. The reset timeout is 140 ms by default, or you can adjust it longer with an external capacitor, which is handy when a power module needs extra time to settle before the CPU starts. This is a sequencer, not just a supervisor: it controls the power-up order of multiple rails, which matters on multi-voltage boards where an FPGA or SoC needs core before I/O, or vice versa. The voltage thresholds are configurable across nine selectable combinations, so one part covers a range of rail voltages without changing the BOM.
Lifecycle and sourcing reality
Marked as Active in production — no end-of-life notice, no last-time-buy pressure. RoHS3 compliant, so it passes the current environmental directives without an exemption. No second-source alternate is listed on the official cross-reference, so dual-sourcing would require a separate qualification effort.