Before revision: ''MSL 6 – Mandatory Bake before use MSL 5A – 24 hours MSL 5 – 48 hours MSL 4 – 72 hours MSL 3 – 168 hours MSL 2A – 4 weeks MSL 2 – 1 year MSL 1 – Unlimited References IPC/JEDEC J-STD-020D.1 , Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices, March 2008.
After revision: ''MSL 6 – Mandatory Bake before use MSL 5A – 24 hours MSL 5 – 48 hours MSL 4 – 72 hours MSL 3 – 168 hours MSL 2A – 4 weeks MSL 2 – 1 year MSL 1 – Unlimited References IPC/JEDEC J-STD-020E , Moisture/Reflow Sensitivity Classification for Nonhermetic Surface Mount Devices,