Found 4 alternatives for ADT7421ARMZ-2RL by onsemi. Interface Sensor And Detector Interfaces — 8-TSSOP, 8-MSOP (0.118", 3.00mm Width).
IC TEMP MONITOR 8-MSOP
ANALOG CIRCUIT, 1 FUNC, PDSO8
IC THERMISTOR TO DGTL 8UMAX