Test results of RD53B chips for ATLAS and CMS phase-2 pixel upgrades

<!--HTML-->Following the RD53A demonstrator, the ItkPix (ATLAS) and CROC (CMS) pixel readout chips are being developed within the RD53 collaboration for the HL-LHC pixel detector upgrades of the two experiments. The two chips are based on a common design, called RD53B, in 65nm CMOS technology and are optimized for very high rate (3GHz/cm2) and radiation levels (>500Mrad). The ATLAS pre-production chip ItkPixV1 was submitted in March 2020 and the CMS pre-production chip CROCv1 is being submitted in May 2021. This contribution gives a general overview of the chip architecture and discusses the characterization and testing of the pre-production chips.