4-Mbit (512K x 8) Static RAM

Features

• Temperature Ranges
  • Commercial: 0°C to 70°C
  • Industrial: -40°C to 85°C
  • Automotive: -40°C to 125°C
• High speed
  • tAA = 10 ns
• Low active power
  • 324 mW (max.)
• 2.0V data retention
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with /CE and /OE features

Functional Description

The CY7C1049CV33 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. 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 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).

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