[AvechuchoAxel]

Hello,
I am searching for a datasheet and purchase source for N7100080FSCAGA.
It is an obsolete Philips IC used as an aircore driver for a FORD speedometer.


I bought some from China, but the ratio of input frequency to deflection is different.
For example, on an original part, an input frequency of 66Hz would read as 30MPH, whereas on the "new" part, the speedometer reading is 12MPH.
The difference between the original and replacement chip speedometer readings is 2.5 (original ):1 (replacement) across a spectrum of 10Hz - 333Hz.
Any info about it? Thanks