The DP8440 41 Dynamic RAM Controllers provide an easy interface between dynamic RAM arrays and 8- 16- 32- and 64-bit microprocessors The DP8440 41 DRAM Controllers generate all necessary control and timing signals to successfully interface and design dynamic memory systems With significant enhanceme
Features
make the DP8440 41 DRAM Controllers flexible enough to fit many memory systems
Features
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40 MHz and 25 MHz operation Page detection Automatic CPU burst accesses Support 1 4 16 64 Mbits DRAMs High capacitance drivers for RAS CAS WE and Q outputs Support for fast page static column and nibble mode DRAMs High precision PLL based delay line Byte enable for word size up to 32 bits on the DP8440 or 64 bits on the DP8441 Automatic Internal Refresh Staggered RAS-Only refr.
DP8440-40 DP8440-25 DP8441-40 DP8441-25 microCMOS Programmable 16 64 Mbit Dynamic RAM Controller Driver
February 1995
DP8440-40 DP8440-25 DP8441-40 DP8441-25 microCMOS Programmable 16 64 Mbit Dynamic RAM Controller Driver
General Description
The DP8440 41 Dynamic RAM Controllers provide an easy interface between dynamic RAM arrays and 8- 16- 32- and 64-bit microprocessors The DP8440 41 DRAM Controllers generate all necessary control and timing signals to successfully interface and design dynamic memory systems With significant enhancements over the DP8420 21 22 predecessors the DP8440 41 are suitable for high performance memory systems These controllers support page and burst accesses for fast page static column and nibble DRAMs Refreshes and accesses are arbitrated on chip RAS low time
DP8440 Datasheet
