The reference voltage makes use of a handy SOT package.4 terminations with various functions.Reflow soldering should be performed at a temperature of 240.
SPX1521M3-3.3 Features
Peak Reflow Temperature: 240
SPX1521M3-3.3 Applications
There are a lot of Sipex SPX1521M3-3.3 Voltage Reference applications.
Portable, battery-powered equipment
Cellular phones, notebook computers, PDAs, GPSs, and DMMs
Computer workstations
Suitable for use with a wide range of video RAMDACs