Precision control is used to control the part as a voltage reference.An external package of Tape and Reel encloses the voltage reference ic.It contains 6 pins.
LT1790ACS6-1.25#TR (CUT T&R) Features
LT1790ACS6-1.25#TR (CUT T&R) Applications
There are a lot of Analog Devices LT1790ACS6-1.25#TR (CUT T&R) Voltage Reference applications.