S27KL0643DPBHB023 is a 64 Mb HYPERRAM™ self-refresh DRAM (PSRAM) using an Octal xSPI DDR interface with RWDS read strobe/write mask and hardware RESET#. It operates from 2.7 V to 3.6 V, supports up to 166 MHz clock rate, and offers linear or wrapped bursts (16 to 128 bytes). AEC-Q100 Grade 2 -40°C to +105°C plus Hybrid Sleep and deep power down to 12 µA reduce memory power in automotive embedded systems.