P4C149

P4C148, P4C149 ULTRA HIGH SPEED 1K x 4 STATIC CMOS RAMS FEATURES Full CMOS, 6T Cell High Speed (Equal Access and Cycle Times) – 10/12/15/20/25 ns (Commercial) – 15/20/25/35 ns (P4C148 Military) Low Power Operation – 715 mW Active –10 (Commecial) – 550 mW Active –25 (Commercial) – 110 mW Standby (TTL Input) P4C148 – 55 mW Standby (CMOS Input) P4C148 Single 5V ± 10% Power Supply P4C148/P4C149 Two Options – P4C148 Low Power Standby Mode – P4C149 Fast Chip Select Control Common Input/Output Ports Three-State Outputs Fully TTL Compatible Inputs and Outputs Standard Pinout (JEDEC Approved) – 18 Pin 300 mil DIP DESCRIPTION The P4C148 and P4C149 are 4,096-bit ultra high-speed static RAMs organized as 1K x 4. Both devices have common input/output ports. The P4C148 enters the standby mode when the chip enable (CE) goes HIGH; with CMOS input levels, power consumption is extremely low in this mode. The P4C149 features a fast chip select capability using CS. The CMOS memories require no clocks or refreshing, and have equal access and cycle times. Inputs are fully TTL-compatible. The RAMs operate from a single 5V ± 10% tolerance power supply. Access times as fast as 10 nanoseconds are available, permitting greatly enhanced system operating speeds. CMOS is used to reduce power consumption when active; for the P4C148, consumption is further reduced in the standby mode. The P4C148 and P4C149 are available in 18-pin 300 mil DIP packages providing excellent board level densities. FUNCTIONAL...