CY7C109V33

The CY7C109V33/CY7C1009V33 is a high-performance CMOS static RAM organized as 131,072 words by 8 bits. Easy memory expansion is provided by an active LOW Chip Enable (CE₁), an active HIGH Chip Enable (CE₂), an active LOW Output Enable (OE), and three-state drivers. Writing to the device is accomplished by taking Chip Enable one (CE₁) and Write Enable (WE) inputs LOW and Chip Enable two (CE₂) input HIGH. Data on the eight I/O pins (I/O0 through I/O7)of CY7C109V33 is then written into the location specified on the address pins (A0 through A16).

Reading from CY7C109V33 is accomplished by taking Chip Enable one (CE₁) and Output Enable (OE) LOW while forcing Write Enable (WE) and Chip Enable two (CE₂) HIGH. Under these conditions, the contents of the memory location specified by the address pins will appear on the I/O pins.

The eight input/output pins (I/O0 through I/O7) are placed in a high-impedance state when CY7C109V33 is deselected (CE₁ HIGH or CE₂ LOW), the outputs are disabled (OE HIGH), or during a write operation (CE1 LOW, CE₂ HIGH, and WE LOW).

The CY7C109V33 is available in standard 32-pin, 400-mil-wide SOJ package. The CY7C1009V33 is available in a 32-pin, 300-mil-wide SOJ package. The CY7C1009V33 and CY7C109V33 are functionally equivalent in all other respects.