S27KL0643DPBHI023 is a 64 Mb HYPERRAM™ self-refresh PSRAM using an octal xSPI interface with DDR transfers, RWDS strobe, and optional DCARS. It supports 1.7 V to 2.0 V or 2.7 V to 3.6 V supplies, up to 200 MHz clock and 400 MBps throughput, plus 35 ns max access time. It is offered in a 24-ball FBGA, industrial -40°C to 85°C grade, with Hybrid Sleep and 12 µA deep power down at 2.0 V, 105°C.