Dresden, Jan.26th,1999
Gersdorf,QP
(
(0351 ) 8822 586
Qualification Report
U637H256DC25 / U637256DC70
U637H256DK25 / U637256DK70
Function:
32k x 8 nvSRAM ,, Cap - Store ,,
Package:
DIP 28 ( 600mil ) plastic
Lot no.:
2259041, 225941A, 2279821, 2279821A
Test results
Test
No.
Function/
electrical parameters
Conditions
n
c
r
Remarks
1.1
function
data sheet ; 0C to 70C
-40C to 85C
500
315
0
0
0
0
1.2
parameters
data sheet ; 0C to 70C
-40C to 85C
500
315
0
0
0
0
Test
No.
Reliability tests
Conditions
n
c
r
Remarks
3.1.2 temperature
preconditioning
260C/10sec solder bath
DI - water cleaning 10min
135
0
3.2
solder preconditioning
150C/16h
100C/100% r.h./4h
22
0
0
3.2.1 solderability
235C/3sec/solder bath
22
0
0
3.4.1 temperature cycling
TC without preconditioning
-65C/150C 1000cycles
10
0
0
page 1 of 3
Test
No.
Reliability tests
Conditions
n
c
r
Remarks
3.4.2 temperature cycling
TC, preconditioning 3.1.2
-65C/150C 1000cycles
45
0
0
3.5.2 high temperature
storage HTS/data retention
endurance
150C
25C/100k
cycles
192h
500h
1000h
2000h
2000h
32
32
32
0/0
0/ -
0/ -
0/0
0/0
0/0
lot no. 2259041
1)
3.5.2 high temperature
storage HTS/data retention
endurance
150C
25C/100k
cycles
192h
500h
1000h
2000h
2000h
32
32
32
0/0
0/ -
0/ -
0/0
0/0
0/0
lot no. 2259041A
1)
4.1
temperature humidity bias
THB
85C/85%r.h./5,25V/1000h
45
0
0
lot no. 2259041A
1)
4.1
temperature humidity bias
THB
85C/85%r.h./5,25V/1000h
45
0
0
lot no. 2279821
1)
4.3.2 pressure cooker test
PCT, preconditioning 3.1.2
121C/100%r.h.
168h
336h
45
0
-
0
0
lot no. 2259041
4.3.2 pressure cooker test
PCT, preconditioning 3.1.2
121C/100%r.h.
168h
336h
45
0
-
0
0
lot no. 2279821A
5.1.2 electrical life test
HTOL
125C/7,0V 1000h
75
0
0
lot no. 2259041
1)
5.1.2 electrical life test
HTOL
125C/7,0V 1000h
75
0
1
lot no. 2259041A
1), 2)
5.1.2 electrical life test
HTOL
125C/7,0V 1000h
75
0
0
lot no. 2279821
1)
5.1.2 electrical life test
HTOL
125C/7,0V 1000h
75
0
0
lot no 2279821A
1)
page 2 of 3
Test
No.
Reliability tests
Conditions
n
c
r
Remarks
6.1
ESD - integrity
3x
2,0kV
ref.to Vss
3x
8,0kV
6
0
-
0
0
3x
2,0kV
ref.to Vcc
3x
8,0kV
6
0
-
0
0
1)
2000 h ww 06/99
2)
function fail, 700h < testtime < 1000h; failureanalysis in process
the result for the reliability in test no. 5.1.2 is 14 fit ; normalized to 55C,
confidence level 60%
Bernd Gersdorf
c:\word2\typpb\nv6798_1.doc
Kopie:ZMDA/ Dave Salisbury; ZMD/ Dr. Buschbeck
page 3 of 3
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