S80KS5123GABHI023 is a 512 Mb HYPERRAM™ self-refresh DRAM with a 1.8 V VCC/VCCQ Octal xSPI slave interface. It uses an 8-bit DDR data bus with 16-bit word addressing, up to 200 MHz clock for sustained throughput to 400 MBps, and 35 ns max access time. RWDS indicates refresh latency and provides read strobe/write mask, while deep power down reduces current to 30 µA at 105°C for power-managed designs.