The HM62256B series is a 32,768 word × 8 bit high speed CMOS static RAM that utilizes 0.8 µm Hi-CMOS process technology to achieve higher performance and lower power consumption. The device is available in 8 × 14 mm TSOP, 8 × 13.4 mm TSOP with a thickness of 1.2 mm, 450 mil SOP (footprint pitch width), 600 mil plastic DIP, or 300 mil plastic DIP packages for high density mounting. It offers low power standby power dissipation and is therefore suitable for battery back-up systems.
The Hitachi HM62256B Series is a 32,768‑word by 8‑bit high‑speed CMOS static RAM offering low standby power and single‑5 V operation. It is available in several package types, including 28‑pin DIP, 28‑pin SOP and 32‑pin TSOP, making it suitable for high‑density mounting and battery‑back‑up systems.
The document provides ordering information, pin assignments, block diagram, absolute maximum ratings, DC and AC characteristics, and package dimensions, enabling designers to evaluate performance, power consumption, and mechanical compatibility.
| Access time | 45/55/70/85 ns (max) |
|---|---|
| Supply voltage | 4.5 V – 5.5 V |
| Operating temperature | -40 °C to +70 °C |
The access time ranges from 45 ns to 85 ns, depending on the version.
The device operates with a supply voltage between 4.5 V and 5.5 V.