DP8421V, DP84T22 Datasheet (National Semiconductor) - microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers

DP8421V, DP84T22, microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers

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 auto

DP8421V Features

* Y Y Y Y Y Y Y Y Y Y On chip high precision delay line to guarantee critical DRAM access timing parameters microCMOS process for low power High capacitance drivers for RAS CAS WE and DRAM address on chip On chip support for nibble page and static column DRAMs TRI-STATE outputs (DP84T22 only) By