First line: 27256 ROM pin configuration 256K (32,768 nniiin Static CMOS Electronics S63256 Fast Access Time: Maximum Maximum Maximum Standby Power jjlW Maximum Fully Static OperationAbstract: .. 256K 256K Bit 32,768 X 8 â– > nniiin Static CMOS ROM Electronics Preliminary Data Sheet S63256 Features • Fast Access Time: S63256D—150ns 150ns 0 °C to +70 °C Maximum S63256I—175ns 175ns -40 °C to +85 °C Maximum .. Tags: 27256 ROM pin configuration27128 epromdatasheet abstract..