Other Parts Discussed in Thread: CD4024B
Hi,
I work for a manufacture that makes specialist equipment used on some vehicles , we have for over 20 years made use of normal grade parts like the SN74HC14DR, the product used to be retrofitted by the end user, and not at all safety critical.
More recently some vehicle builders have started to fit them at time of manufacture, and as a result we have been requested to submit data using IMDS.
For the non automotive parts TI will not supply a MDS via the IMDS system so I have to create them from the available material declarations.
Looking at the SN74HC14DR there looks to be eight different assembly plants, using different bond wires, lead frames and Mold compounds.
As the differences are the assembly plants - I assume the fabrication of the die will be the same process for all, this looks to be supported by most having a die mass of 0.719655mg.
However one of the subcontractor assemblies lists the die as only 0.163915mg ? is this an error - or a different die in use ?
Assuming I would find more consistently in the true automotive part I looked at the SN74HC14QDRQ1
Ignoring the G4 suffix for "green" packaging there are two plants Mexico and Malaysia that assemble this part, again the two plants use different packaging - but I was expecting to find the die to be consistent, and the same as in the commercial parts, but not at all.
In TI AGUASCALIENTES the die is shown as 1.119429 mg where in TI MALAYSIA A/T it drops to only 0.145884 mg
Does any one have an explanation for this ?
I have not done so but if I where to request the MDS via IMDS for these parts - what is shown as the mass etc. when there seems to be differences even in the automotive grade parts ?
( May be there are errors and most never spot them ? - one supplier submitted a MDS that had been in use for 5 years - that included the tape carrier - and the mass was way off -- they had derived the mass from the number on the reel and the mass of the complete tape and reel in its shipping box ! )
