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DP8421V

National Semiconductor
Part Number DP8421V
Manufacturer National Semiconductor
Description microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
Published Jan 7, 2006
Detailed Description DP8420V 21V 22V-33 DP84T22-25 microCMOS Programmable 256k 1M 4M Dynamic RAM Controller Drivers May 1992 DP8420V 21V 22...
Datasheet PDF File DP8421V PDF File

DP8421V
DP8421V

Overview
DP8420V 21V 22V-33 DP84T22-25 microCMOS Programmable 256k 1M 4M Dynamic RAM Controller Drivers May 1992 DP8420V 21V 22V-33 DP84T22-25 microCMOS Programmable 256k 1M 4M Dynamic RAM Controller Drivers General Description The DP8420V 21V 22V-33 DP84T22-25 dynamic RAM controllers provide a low cost single chip interface between dynamic RAM and all 8- 16- and 32-bit systems The DP8420V 21V 22V-33 DP84T22-25 generate all the required access control signal timing for DRAMs An on-chip refresh request clock is used to automatically refresh the DRAM array Refreshes and accesses are arbitrated on chip If necessary a WAIT or DTACK output inserts wait states into system access cycles including burst mo...


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