There are different types of functions that end with 8.There is 1 need to change the output to 1.Reflow soldering shouldn't exceed 235.There is a maximum inaccuracy of 4% for this voltage reference ic.
ZSR1000N8 Features
Peak Reflow Temperature: 235
ZSR1000N8 Applications
There are a lot of Zetex ZSR1000N8 Voltage Reference applications.