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.

FEATURES
■ Full CMOS, 6T Cell
■ High Speed (Equal Access and Cycle Times)
    – 10/12/15/20/25/35/45/55 ns (Commercial)
    – 15/20/25/35/45/55 ns (P4C148 Military)
■ Low Power Operation
■ Single 5V ± 10% Power Supply
■ 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
    – 18 Pin LCC (295 x 335 mil) [P4C148 only]
    – 18 Pin LCC (290 x 430 mil)