4721BDC National Semiconductor

Description: STANDARD SRAM, 256X4, CMOS, Memory Organization: 256 x 4, Memory Interface: Parallel, Part Status: Active, Supplier Device Package: 22-CDIP, Memory Format: RAM, Technology: RAM, Voltage - Supply: 4.5V ~ 5.5V, Operating Temperature: 0°C ~ 70°C (TA), Memory Type: Volatile, Memory Size: 1Kbit, Mounting Type: Through Hole, Package / Case: 22-CDIP, Packaging: Bulk.