Hello masters..
this board came water damaged, DA0X8JMB8E0 Rev E with discrete graphics,
cleaned and restored except those two chips:
#1 marked "ZU8KA" and #2 marked "AE"
Вложение:
DA0X8JMB8E0.jpg
Location on DA0X8JMB8E0 DSC
Вложение:
Quanta X8J DSC 8E0.jpg
#2 was easy to identify, a simple 2-input AND gate, it is a 74AHC1G08GW -
datasheetВложение:
74Ahc1G08Gw.jpg
No schematics / boardview of Quanta X8J was found to identify chip #1 but identical chips was found in a different location on photos of DA0X8JMB16E0 "UMA", sadly no schematics / boardview too:
Вложение:
Quanta X8J UMA 16E0.jpg
accidentally i've found that this part of the board (DA0X8JMB16E0) is identical to the design of Quanta X8M (DA0X8MMB6D0) and the boardview is available:
Вложение:
Quanta X8M BDV.jpg
so we have the pinout of those chips now
by studying the design and matching to the schematics of Quanta X81 i can confirm now that chip #1 (ZU***) = MC74VHC1G08DFT2G -
datasheetBUT!!! according to the schematics chip #2 is also MC74VHC1G08DFT2G ?! which is a simple 2-input AND gate too..
note that both are supplied by +3v
Вложение:
Quanta X81.jpg
went back to Quanta X8M's boardview and found that the difference is that MC74VHC1G08DFT2G (ZU***) is supplied by +5v while 74AHC1G08GW (AE) is supplied by +3v, but according to the datasheets both chips can handle 5v supply and i didn't find any differences so i'm lost at this point
what's the difference between those two, or did i identify them incorrectly ??