Dec 19, 2017 · The industry-standard JEDEC MSL values imply a component's "floor life" (time spent in storage bin before being mounted on a PCB) at a specified temperature and relative humidity, as well as standard and accelerated soak requirements; i.e. how long to bake at what temperature and what relative humidity, so that the part can be safely mounted in a reflow oven.

Higher numbers indicate higher sensitivity, with MSL 6 parts always requiring a bake before use. Most parts that I've seen are MSL 5/5a, in which a 48-24 hour exposure period before requiring a bake. Best practices would be to open the part bag on a moisture sensitive part just before assembly; and then reseal the bag after the part is removed.

MSL 1 – Unlimited where the times listed are the component "floor life out of the bag." If a component is moisture sensitive, it will come in a labelled, airtight anti-static bag, with a moisture indicator strip and desiccant.

Mar 22, 2017 · How to bake MSL components for DIY reflow? Ask Question Asked 8 years ago. Modified 8 years ago. Viewed ...

Jan 9, 2011 · I couldn't find similar data after my initial search, but it seems like the usual MSL (moisture sensitivity levels) ratings for surface-mount parts are given and applicable. Share Cite

Apr 23, 2015 · A modern Intel NIC can have 3 or 5 MSI-X vectors assigned: one global, one for the TX queue, one for the RX queue, god knows what the others are for. Note that the traditional Local APIC in the CPU only had 255 IRQ service vector slots, which might already present a bottleneck on a busy high-end server machine.

Aug 23, 2016 · For comparison, for the same board, you could get close to 50-Ohm using a 40-mil wide trace with a 5-mil gap to the coplanar ground planes. These numbers are only estimates. Make sure you do the calculations. CPW geometries can be tricky to calculate.

Jan 16, 2018 · Use flux remover and remove any residues that may be left on the board. Check components' leads for any damage or corrosion. Any damaged parts will need to be replaced. Check the datasheets for all parts: any parts that are MSL (Moisture Sensitivity Level) level 3 will need to be replaced. Odds are the battery has shorted and will need to be ...

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You need to rename the connectors in sheet 5 (or whichever sheet is offending) Sheet2 has J2 J3 Sheet5 needs to be J4 J5 Manually check all of the sub sheets and see if any two designators are the same