DESCRIRTION
The OKI MSM514223B is a high performance 1-Mbit, 256K x 4-bit, Field Memory. It is designed for high-speed serial access applications such as HDTVs, conventional NTSC TVs, VTRs, digital movies and Multi-media systems. It is a FRAM for wide or low end use as general commodity TVs and VTRs, exclusively. The MSM514223B is not designed for the other use or high end use in medical systems, professional graphics systems which require long term picture, and data storage systems and others. The 1-Mbit capacity fits one field of a conventional NTSC TV screen and cascaded two MSM514223Bs make one frame of the screen: more than two MSM514223Bs can be cascaded directly without any delay devices among the MSM514223Bs. (Cascading of MSM514223B provides larger storage depth or a longer delay).

FEATURES
• Single power supply: 5 V ±10%
• 512 Rows x 512 Column x 4 bits
• Fast FIFO (First-in First-out) operation
• High speed asynchronous serial access
    Read/Write cycle time 30 ns/40 ns/60 ns
    Access time 25 ns/30 ns/50 ns
• Direct cascading capability
• Write mask function (Input enable control)
• Data skipping function (Output enable control)
• Self refresh (No refresh control is required)
• Package:
    18-pin 300 mil plastic DIP (DIP18-P-300-2.54-W1) (Product : MSM514223B-xxRS)
                                                                                         xx indicates speed rank.