How do I determine if an Allegro device is Pb-free?
Pb actually has a limited presence in semiconductor devices. The only place where it has been commonly present in significant concentrations, as defined by RoHS, is in the SnPb alloy plating material that has traditionally been used to enhance leadframe solderability. By using 100% matte tin leadframe plating, Allegro eliminates even this contributor of Pb. Pb is also present in the high-temperature solders used to bond flip-chips. There is currently no substitute for this technology, and flip-chip devices are exempted by RoHS. Allegro does supply some flip-chip devices, however, even though high-temperature solder may be present in the interior of the device, 100% matte tin leadframe plating is used, eliminating Pb from the exposed areas of the devices. The Pb-free status of a particular Allegro device variant can be determined by referring to the documentation for the device. Most Allegro products have very small physical dimensions, so for reasons such as legibility or customer proc
