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PDM31256SA15SO
PDM31256 3.3V 256K Static RAM 32K x 8-Bit Description Features n n The PDM31256 is a high-performance CMOS static RAM organized as 32,768 x 8 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, 15 and 20ns Ind’l: 12, 15 and 20ns Low power operation (typical) - PDM31256SA Active: 200 mW Standby: 15mW n 1 The PDM31256 operates from a single +3.3V power supply and all the inputs and outputs are fully TTLcompatible. Single +3.3V (±0.3V) power supply n TTL-compatible inputs and outputs n The PDM31256 is available in a 28-pin 300-mil plastic SOJ and a 28-pin plastic TSOP (I). Packages Plastic SOJ (300 mil) - SO Plastic TSOP (I) - T 2 3 4 5 6 Functional Block Diagram Addresses I/O 0 • 7 A0 • • • • • A14 Decoder • • • • • • Memory 8 Matrix • • • • • Input Data Control 9 Column I/O • I/O 7 10 • • CE WE • 11 Control OE 12 Rev. 3.3 - 4/29/98 1
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