This document describes the features and characteristics of the ISSI IS62C256AL/IS65C256AL, a low power 32,768-word by 8-bit CMOS static RAM. It highlights its low power consumption, static operation, and TTL compatible inputs and outputs.
The IS62C256AL and IS65C256AL are 32‑kilobyte by 8‑bit low‑power CMOS static RAM devices offering fast 25 ns access time and very low standby power. They are TTL‑compatible, feature a single 5 V supply, and are pin‑compatible with other 32K×8 SRAMs in SOP or TSOP packages.
The datasheet provides detailed electrical characteristics, timing diagrams for read and write cycles, pin configurations, absolute maximum ratings, and packaging dimensions for both SOP and TSOP variants. Temperature specifications cover commercial, industrial, and automotive grades.
| Access time | 25 ns typical, 45 ns max |
|---|---|
| Active power consumption | 200 mW typical |
| Standby power | 150 pW typical |
| Supply voltage | 5 V single supply |
| Commercial temperature range | 0 °C to +70 °C |
| Industrial temperature range | -40 °C to +85 °C |
| Automotive temperature range | -40 °C to +125 °C |
| Package types | 28‑Pin SOP, 28‑Pin TSOP |
| Input HIGH voltage (VIH) | 2.2 V |
The typical access time is 25 ns, with a maximum of 45 ns.
The device operates from a single 5 V power supply.
The automotive version operates from –40 °C to +125 °C.