AK48256S

The Accutek AK48256 high density memory modules is a random access memory organized in 256K x 8 bit words. The assembly consists of eight standard 256K x 1 DRAMs in plastic leaded chip 0carriers (PLCC) mounted on the front side of a printed circuit board. 0The module can be configured as a leadless 30 pad SIM or a leaded 030 pin SIP. This packaging approach provides a 6 to 1 density increase over standard DIP packaging.

The operation of the AK48256 is identical to eight 256K x 1 DRAMs.0The data input is tied to the data output and brought out separately0 for each device, with common RAS,CAS andWE control. This 0common I/O feature dictates the use of early-write cycles to prevent 0contention of D and Q. Since the Write-Enable (WE) signal must always go low beforeCAS in a write cycle, Read-Write and Read-Modify-Write operation is not possible.