I would like to know what is mean by A+ in the device marking in the LF355 series. Please let me know asap. This product is a legacy part from National Semiconductor. marking_conventions.pdf
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I would like to know what is mean by A+ in the device marking in the LF355 series. Please let me know asap. This product is a legacy part from National Semiconductor. marking_conventions.pdf
Hi Manickavel,
Please see the attached document describing the A+ processing. In summary:
The A+ Program provides:
• 100% Temperature Cycling
• 100% Electrical Testing at Room and High Temperature
• 100% Burn-In Testing Combining Increased Temperature with Applied Voltage
• Acceptable Quality Levels Greater than Industry Norm
Typical A+ Flow is:
• SEM
• Assembly and Seal
• Four Hour 150'C Bake
• Five Temperature Cycles (O'C to + 1 OO'C)
• High Temperature Electrical Test
• Electrical Test
• Burn-In (160 hours at a minimum junction temperature of 125'C)
• DC Parametric and Function Tests
• Tightened Quality Control Inspection Plans
Hope that helps,
Paul