V. Quality Assurance Information
A. Quality Assurance Contacts: Jim Pedicord
Bryan Preeshl
(Reliability Lab Manager)
(Executive Director of QA)
Kenneth Huening (Vice President)
B. Outgoing Inspection Level: 0.1% for all electrical parameters guaranteed by the Datasheet.
0.1% For all Visual Defects.
C. Observed Outgoing Defect Rate: < 50 ppm
D. Sampling Plan: Mil-Std-105D
VI. Reliability Evaluation
A. Accelerated Life Test
The results of the 150°C biased (static) life test are shown in Table 1. Using these results, the Failure
Rate (l ) is calculated as follows:
l =
1
=
1.83
(Chi square value for MTTF upper limit)
MTTF
192 x 9823 x 45 x 2
Temperature Acceleration factor assuming an activation energy of 0.8eV
l = 10.78 x 10-8
l = 10.78 F.I.T. (60% confidence level @ 25°C)
This low failure rate represents data collected from Maxim’s reliability qualification and monitor programs.
Maxim also performs weekly Burn-In on samples from production to assure reliability of its processes. The
reliability required for lots which receive a burn-in qualification is 59 F.I.T. at a 60% confidence level, which equates
to 3 failures in an 80 piece sample. Maxim performs failure analysis on rejects from lots exceeding this level. The
aBurn-In Schematic shows the static circuit used for this test. Maxim also performs 1000 hour life test monitors
quarterly for each process. This data is published in the Product Reliability Report (RR-1M).
B. Moisture Resistance Tests
Maxim evaluates pressure pot stress from every assembly process during qualification of each new design.
Pressure Pot testing must pass a 20% LTPD for acceptance. Additionally, industry standard 85°C/85%RH or
HAST tests are performed quarterly per device/package family.
C. E.S.D. and Latch-Up Testing
The WR22-2 die type has been found to have all pins able to withstand a transient pulse of <250V, per Mil-
Std-883 Method 3015 (reference attached ESD Test Circuit). Latch-Up testing has shown that this device
withstands a current of ±50mA.