The S-873021AUP-ADET2G from ABLIC Inc. is a constant voltage power supply voltage detector Integrated Circuit with 1 output, supplied in a SOT-89-5 package.
The S-873021AUP-ADET2U from ABLIC Inc. is a positive fixed linear voltage regulator Integrated Circuit with 1 output at 3 V and 30 mA, in a SOT-89-5 package.