CY7C178

The CY7C178 is a 32k by 18 synchronous cache RAMs designed to interface with high-speed microprocessors with minimum glue logic. The features of CY7C178 could be summarized as (1)supports 66 MHz pentium microprocessor cache systems with zero wait states; (2)32K by 18 common I/O; (3)fast clock-to-output times: 8.5ns; (4)two-bit wraparound counter supporting linear burst sequence; (5)separate processor and controller address strobes; (6)synchronous self-timed write; (7)direct interface with the processor and external cache controller; (8)asynchronous output enable; (9)I/Os capable of 3.3V operation; (10)industy-standard pinout; (11)52-pin PLCC and PQFP.

The absolute maximum ratings of the CY7C178 are: (1)storage temperature: -65 to ±150; (2)ambient temperature with power applied: -55 to ±125; (3)supply voltage to ground potential: -0.5V to +7.0V; (4)DC voltage applied to outputs in high Z state: -0.5V to +7.0V; (5)DC input voltage: -0.5V to +7.0V; (6)current into outputs: 20mA.

The following is about the electrical characteristics of CY7C178: (1)output high voltage: 2.4V min at VCC=min, IOH=-4.0mA; (2)output low voltage: 0.4V max at VCC=min, IOH=8.0mA; (3)input high level: 2.2V min and VCC+0.3V max; (4)input low level: -0.3V min and 0.8V max; (5)input load current: -1A min and +1A  max at GNDVIVCC; (6)output leakage current: -5A min and +5A max at GNDVINVCC, output disabled; (7)output short circuit current: -300mA max at VCC=max, VOUT=GND.