What this single-cell monitor does on the board
The MAX6428AGUR-T is a single-cell battery monitor that works across multiple chemistries — Li-ion, NiMH, alkaline, you name it — so it fits portable or backup-power designs where the cell type isn't fixed at layout time. Housed in a SOT-23-3 (TO-236/SC-59) package, it takes up minimal board area and suits space-constrained portable gear or coin-cell holders.
Surface-mount SOT-23-3 — three-pin, small footprint. The pad layout matches the standard SC-59 land pattern; no special via-in-pad or thermal-relief needed for this low-power monitor. Supplied in Bulk (tube or tray, not tape-and-reel) — factor this into your pick-and-place feeder setup if you're running reel-only lines.
Compliance and lifecycle
RoHS non-compliant — this is a legacy tin-lead (SnPb) finish part. If your assembly line is RoHS-exempt (mil/aero, medical implant, or high-reliability solder joint) it's fine; for standard lead-free reflow you'll need to confirm exemption or look for a Pb-free variant.