Batch #3, all pins has NO solder on it, NOS ? Date code 9609, manufactured in Malaysia. Cost USD $1.53
![3458A, Elantec EL2018CN obsolete? 1243927-0](https://www.eevblog.com/forum/index.php?action=dlattach;topic=285489.0;attach=1243928;image)
Did some measurement with the supply current (Vs +- 15V)
with both input 1k ohm to ground:
IS+EN 4.98 ma (data sheet typical 8.4 max 12)
IS+DIS 2.27 ma (data sheet typical 4.7 max 6)
IS-EN 9.54 ma (data sheet typical 13.0 max 17)
IS-DIS 3.23 ma (data sheet typical 5.0 max 6.5)
Fake
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif.pagespeed.ce.5xOqKkq0Co.gif)
If so, wonder what is inside as it response to the voltage level change on CS.