S27KL0642DPBHB020 is a 64 Mb HYPERRAM™ self-refresh DRAM (PSRAM) using a HYPERBUS™ DDR interface with an 8-bit DQ bus, CS#, RWDS data strobe, and RESET#. It supports single-ended or differential clocking, operates from a 3.0 V VCC supply (2.7 V to 3.60 V), and is rated for 166 MHz max clock with 35 ns max access time. Burst modes include linear and wrapped. Deep power-down is 12–15 µA.