ALLIANCE MEMORY AS7C4098A-15JCN SRAM, Asynchronous, 4 Mbit, 256K x 16bit, SOJ, 44 Pins, 4.5 V

AS7C4098A-15JCN is a 5.0V 4Mb (256K × 16) CMOS fast SRAM. It is a high-performance CMOS 4,194,304-bit static random access memory (SRAM) device organized as 262,144 words × 16 bits. It is designed for memory applications where fast data access, low power, and simple interfacing are desired. Equal address access and cycle times (tAA, tRC, tWC) of 10/12/15/20ns with output enable access times (tOE) of 5/6ns are ideal for high-performance applications. The chip enable input CE permits easy memory expansion with multiple-bank memory systems. The device provides multiple center power and ground pins, and separate byte enable controls, allowing individual bytes to be written and read. LB controls the lower bits, I/O1�I/O8, and UB controls the higher bits, I/O9�I/O16. All chip inputs and outputs are TTL- and CMOS-compatible, and operation is for 5.0V supply.

• Center power and ground pins
• High speed, 10/12/15/20ns address access time, 5/6ns output enable access time
• Low power consumption, 990mW/max at 10ns (active), 55mW/max CMOS (standby)
• Individual byte read/write controls
• Easy memory expansion with active-low CE, active-low OE inputs
• TTL- and CMOS-compatible, three-state I/O
• 44-pin JEDEC standard packages
• ESD protection is ? 2000volts, latch-up current is ? 200mA
• 15ns access time, SOJ package
• Commercial temperature range from 0 to 70°C