What the dual per-pin PMU does on the bench
The MAX9949FCCB is a dual per-pin PMU (parametric measurement unit) — the kind of IC that sits on an ATE channel card forcing voltage and measuring current, or forcing current and measuring voltage, per pin on a device under test. Two independent PMU channels in one package means a single chip handles two DUT pins, cutting the channel-card component count in half.
Package and compliance reality check
Supplied in Bulk — not tape-and-reel, not a tray count. That matters if your pick-and-place feeder expects a specific carrier; Bulk means loose parts in a bag or tube, so hand-place or rework into a tube for the machine. RoHS non-compliant per the lifecycle record. No lead-free finish — the scorch mark on a reflowed board might tell you the solder joint failed, not the die.
Active, but RoHS non-compliant narrows the buyer pool — most production lines have phased out tin-lead. That means the remaining demand is concentrated in mil/aero, high-rel repair, or legacy ATE maintenance where the solder profile is still SnPb.