S27KL0643DPBHA023 is a 64 Mb HYPERRAM™ self-refresh DRAM (PSRAM) for xSPI external memory expansion in automotive ECUs. It uses an Octal xSPI interface with 8-bit DQ, CS#, RWDS, and RESET#, and supports DDR transfers up to 200 MHz for up to 400 MBps (3,200 Mbps) throughput with 35 ns max access time. Operates from 2.7 V to 3.6 V, in a 24-ball FBGA, AEC-Q100 Grade 2 (-40 to 105°C).