IS61M256-15N CMOS static RAM (SRAM) by ISSI Package: 28-pin narrow (300 mil) DIP Organisation: 32K-word x 8-Bit Access time: 15 nS *Note: this "M" version has mixed output option. Download IS61M256-15N .pdf datasheet: Status: NOS (New Old Stock) Individually tested: YES ( thorough 7-pass test routine used) RoHS compliant: no