AT-89C52 Datasheet, PDF (2/11 Pages) ATMEL Corporation – 125°C DYNAMIC OPERATING LIFE TEST

LOT
NUMBER
4D1707
4D1707A
5A1634
AT-89C52
PAGE 2 OF 11
125°C DYNAMIC OPERATING LIFE TEST
DATE
CODE
SAMPLE
SIZE
TOTAL
CKT-HRS(K)
NUMBER
OF FAILURES
4B9441
115
287.5
0
4D9505
164
410.0
0
5A9517
143
357.5
0
TOAL DEVICE HOURS
BEST ESTIMATE
50°C AMBIENT
CONFIDENCE ESTIMATE
FAILURE RATE
1,055,000 DEVICE HOURS
λ = 0.07% PER 1,000 HOURS
EXTRAPOLATION TO 50°C.VIA
ARREHENNIUS EQUATION AND
ACTIVATION ENERGY OF 0.5eV
λ = 0.002% PER 1,000 HOURS (23 FITS)
λ 60 = 0.003% PER 1,000 HOURS
60% CONFIDENCE (30 FITS)
λ 90 = 0.007% PER 1,000 HOURS
90% CONFIDENCE (74 FITS)