CY62148

1CY 621 48 fax id: 1079 www.DataSheet4U.com PRELIMINARY CY62148 512K x 8 Static RAM Features 4.5V−5.5V operation CMOS for optimum speed/power Low active power — 660 mW (max.) Low standby power (L version) — 2.75 mW (max.) Automatic power-down when deselected TTL-compatible inputs and outputs Easy memory expansion with CE and OE options an automatic power-down feature that reduces power consumption by more than 99% when deselected. Writing to the device is accomplished by taking chip enable one (CE) and write enable (WE) inputs LOW. 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 A18). Reading from the device is accomplished by taking chip enable one (CE) and output enable (OE) LOW while forcing write enable (WE). 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 the device is deselected (CE HIGH), the outputs are disabled (OE HIGH), or during a write operation (CE LOW, and WE LOW). The CY62148 is available in a standard 450-mil-wide body width SOIC package. Functional Description The CY62148 is a high-performance CMOS static RAM organized as 524,288 words by 8 bits. Easy memory expansion is provided by an active LOW chip enable (CE), an active LOW output enable (OE), and three-state drivers. This device has Logic Block Diagra...