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Device Production Sequence
7-9
Customer Information
All prototype devices are shipped with the following disclaimer:
It is understood
that, for expediency purposes, the initial 25 prototype devices (and any
additional prototype devices purchased) were assembled on a prototype (i.e.,
not production-qualified) manufacturing line, whose reliability has not been
characterized. Therefore, the anticipated inherent reliability of these devices
cannot be expressly defined.
The customer verifies the operation and quality of the prototypes and
responds with either written customer prototype approval or disapproval. A
nonrecurring mask charge that includes the 25 prototype devices is incurred
by the customer. A minimum purchase is required during the first year of
production.
Customer Sends Code (in
QBN or TITAG format) and
completes Section 1 of the
NPRF
TI completes Section 2A
of NPRF and sends verifi-
cation code (in QBN for-
mat) with BIST included &
NPRF form to customer
Customer verifies
code is correct.
Customer signs Section 3
of the NPRF and sends it
to TI
TI generates prototype
parts for Customer
verification
TI sends sample devices
to customer for
verification
Customer verifies the
devices work properly and
completes Section 4 of the
NPRF.
TI produces the chip
in production quantities
Texas Instruments recommends that prototype devices not be used in produc-
tion systems. The expected end-use failure rate of these devices is undefined;
however, it is predicted to be greater than that of the standard qualified produc-
tion.