The MAX6068BEUR-T from Analog Devices Inc./Maxim Integrated is a fixed series voltage reference Integrated Circuit with 1.8 V output, ±0.39% tolerance and 5 mA, in an SOT-23-3 package.
The MAX6068AEUR+T from Analog Devices Inc./Maxim Integrated is a fixed 1.8 V series voltage reference Integrated Circuit with ±0.17% and a 5 mA rating, in a SOT-23-3 package.