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AT-89C52
200°C DATA RETENTION BAKE
LOT
NUMBER
DATE
CODE
SAMPLE
SIZE
TOTAL
CKT-HRS(K)
NUMBER
OF FAILURES
5C2822
5C9547
393
393.0
0
FAILURE RATE
TOTAL DEVICE HOURS
BEST ESTIMATE
50°C AMBIENT
393,000 DEVICE HOURS
λ = 0.18% PER 1000 HOURS
EXTRAPOLATION TO 50°C VIA
ARRHENNIUS EQUATION AND
ACTIVATION ENERGY OF 0.5eV
λ = 0.0006% PER 1,000 HOURS (6 FITS)
CONFIDENCE ESTIMATE
λ 60 = 0.0008% PER 1000 HOURS
60% CONFIDENCE (8 FITS)
λ 90 = 0.002% PER 1000 HOURS
90% CONFIDENCE (20 FITS)