P93U422

P93U422 HIGH SPEED 256 x 4 STATIC CMOS RAM FEATURES Universal 256 x 4 Static RAM One part, the P93U422, replaces the following bipolar and CMOS parts: – 93422, 93422A – 93L422, 93L422A Fast Access Time – 35 ns Commercial and Military Available in the following packages: – PDIP, CERDIP, Side Brazed DIP – CERPACK – LCC – SOIC CMOS for Low Power – 440 mW (Commercial) – 495 mW (Military) 5V Power Supply ±10% for both commercial and military temperature ranges Separate I/O Fully static operation with equal access and cycle times Resistant to single event upset and latchup due to advanced process and design improvements DESCRIPTION The P93U422 is a 1,024-bit high-speed Static RAM with a 256 x 4 organization. The P93U422 is a universal device designed to replace the entire 93 and 93L 256 x 4 static RAM families. The memory requires no clocks or refreshing and has equal access and cycle times. Inputs and outputs are fully TTL compatible. Operation is from a single 5 Volt supply. Easy memory expansion is provided by an active LOW chip select one (CS 1) and active HIGH chip select two (CS 2) as well as 3-state outputs. In addition to high performance, the device features latchup protection, single event and upset protection. The P93U422 is offered in several packages: 22-pin 400 mil DIP (plastic and ceramic), 24-pin 300 mil SOIC, 24-pin square LCC and 24-pin CERPACK. Devices are offered in both commercial and military temperature ranges. FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS ...