4兆位（ 512K ×8）静态RAM 4 Mbit 512K x 8 Static RAM
Functional Description
The CY7C1049CV33 Automotive is a high performance CMOS Static RAM organized as 524,288 words by eight bits. Easy memory expansion is provided by an active LOW Chip Enable CE, an active LOW Output Enable OE, and three-state drivers. Writing to the device is accomplished by taking Chip Enable 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 CE and Output Enable OE LOW while forcing Write Enable WE HIGH. Under these conditions, the contents of the memory location specified by the address pins appear on the I/O pins. The eight input and 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 CY7C1049CV33 Automotive is available in standard 400-mil-wide 36-pin SOJ package and 44-pin TSOP II package with center power and ground revolutionary pinout.
For best practice recommendations, refer to the Cypress application note AN1064, SRAM System Guidelines.
Features
■ Temperature ranges
❐ Automotive -A: –40 °C to 85 °C
❐ Automotive-E: –40 °C to 125 °C
■ High speed
❐ tAA = 10 ns
■ Low active power
❐ 360 mW max
■ 2.0 V data retention
■ Automatic power down when deselected
■ TTL-compatible inputs and outputs
■ Easy memory expansion with CE and OE features
