CY62128BN

The CY62128BN is a high-performance CMOS static RAM organized as 128K 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 tri-state drivers. This device has an automatic power-down feature that reduces power consumption by more than 75% when deselected.

Writing to the CY62128BN 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) is then written into the location specified on the address pins (A0 through A16).

Reading from the CY62128BN 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) CY62128BN are placed in a high-impedance state when the device 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).