Functional Description
The CY7C194, CY7C195, and CY7C196 are high-performance CMOS static RAMs organized as 65,536 by 4 bits. Easy memory expansion is provided by active LOW Chip Enable(s) (CE on the CY7C194-35PC and CY7C195, CE1, CE2 on the CY7C196) and three-state drivers. They have an automatic power-down feature, reducing the power consumption by 75% when deselected.
Writing to the device is accomplished when the Chip Enable(s) (CE on the CY7C194-35PC and CY7C195, CE1, CE2 on the CY7C196) and Write Enable (WE) inputs are both LOW. Data on the four input pins (I/O0 through I/O3) is written into the memory location, specified on the address pins (A0 through A15).
Reading the device is accomplished by taking the Chip Enable(s) (CE on the CY7C194-35PC and CY7C195, CE1, CE2 on the CY7C196) LOW, while Write Enable (WE) remains HIGH. Under these conditions the contents of the memory location specified on the address pins will appear on the four data I/O pins.
A die coat is used to ensure alpha immunity.
Features
• High speed
— 12 ns
• Output enable (OE) feature (7C195 and 7C196)
• CMOS for optimum speed/power
• Low active power
— 880 mW
• Low standby power
— 220 mW
• TTL-compatible inputs and outputs
• Automatic power-down when deselected
(Picture: Pinout)
