CY7B138

The CY7B138 is a high-speed BICMOS 4K*9 dual-port static RAMs. The features of CY7B138 can be summarized as (1)0.8-micron BICMOS for high performance; (2)high-speed accross: 15ns; (3)automatic power-down; (4)fully asynchronous operation; (5)master/slave select pin allows bus width expansion to 16/18 bits or more; (6)busy arbitration scheme provided; (7)semaphores included to permit software handshaking between ports; (8)INT flag for port-to-port communication; (9)available in 68-pin LCC/PLCC/PGA; (10)TTL compatible.

The absolute maximum ratings of the CY7B138 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: -3.5V to +7.0V; (6)output current into outputs: 20mA.

The following is about the electrical characteristics of CY7B138: (1)output high voltage: 2.4V min at VCC=min, IOH=-4.0mA; (2)output low voltage: 0.4V max at VCC=min, IOH=16.0mA; (3)input high level: 2.2V min; (4)input low level: 0.8V max; (5)input load current: -10A min and +10A  max at GNDVIVCC; (6)output leakage current: -10A min and +10A max at GNDVINVCC, output disabled; (7)operating current: 260mA max at VCC=max, IOUT=0mA, output disable; (8)standby current: 90mA max.