The HM621400H is a 4M-bit high-speed static RAM with a high-speed access time. It is most appropriate for applications that require high-speed and high-density memory, such as cache and buffer memory in a system.
The HM621400H series is a 4‑Mbit static RAM organized as 4‑Mword × 1‑bit, offered in a 400‑mil 32‑pin SOJ package. It is designed for high‑speed, high‑density applications such as cache and buffer memory.
The document provides ordering information, detailed pin descriptions, electrical characteristics, timing diagrams, package dimensions and cautions for proper use.