http://efind.ru/pdfsearch/?search=62256 , к примеру...
Из списка выбрал чип случайно AS6C62256, и вот вроде бы оно -
Цитата
Access time : 55ns
Low power consumption:
Operation current :
15mA (TYP.), VCC = 3.0V
Standby current :
1μ A (TYP.), VCC = 3.0V
Fully Compatible with all Competitors 5V product
Fully static operation
Tri-state output
Data retention voltage : 2.0V (MIN.)
All products ROHS Compliant
Package : 28-pin 600 mil PDIP
28-pin 330 mil SOP
28-pin 8mm x 13.4mm sTSOP
GENERAL DESCRIPTION
The AS6C62256 is a 262,144-bit low power CMOS static random access memory organized as 32,768
words by 8 bits. It is fabricated using very high performance, high reliability CMOS technology. Its
standby current is stable within the range of operating temperature. The AS6C62256 is well designed for low power application, and particularly well suited for battery back-up nonvolatile memory application.
The AS6C62256 operates with wide range power supply 2.7 ~ 5.5V