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PDM41028SA35SO
PDM41028 1 Megabit Static RAM 256K x 4-Bit Description Features n n The PDM41028 is a high-performance CMOS static RAM organized as 262,144 x 4 bits. Writing to this device is accomplished when the write enable (WE) and the chip enable (CE) inputs are both LOW. Reading is accomplished when WE remains HIGH and CE and OE are both LOW. High speed access times Com’l: 10, 12 and 15 ns Ind’l: 12 and 15 ns Low power operation (typical) - PDM41028SA Active: 400 mW Standby: 150 mW - PDM41028LA Active: 350 mW Standby: 100 mW n n n 1 The PDM41028 operates from a single +5V power supply and all the inputs and outputs are fully TTLcompatible. The PDM41028 comes in two versions, the standard power version PDM41028SA and a low power version the PDM41028LA. The two versions are functionally the same and only differ in their power consumption. Single +5V (±10%) power supply TTL-compatible inputs and outputs Packages Plastic SOJ (300 mil) - TSO Plastic SOJ (400 mil) - SO The PDM41028 is available in a 28-pin 300-mil SOJ, and a 28-pin 400-mil SOJ for surface mount applications. I/O 0 I/O 1 3 4 5 6 7 Functional Block Diagram Addresses 2 A0 • • • • • A17 Decoder • • • • • • Memory 8 Matrix 9 • • • • • Input Data Control Column I/O 10 I/O 2 I/O 3 11 CE 12 WE OE Rev. 2.2 - 4/29/98 1
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