DESCRIRTION
The OKI MSM514221B 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 MSM514221B 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.

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
• Functional compatibility with OKI MSM518221
• Self refresh (No refresh control is required)
• Package options:
    16-pin 300 mil plastic DIP (DIP16-P-300-2.54-W1) (Product : MSM514221B-xxRS)
    26/20-pin 300 mil plastic SOJ (SOJ26/20-P-300-1.27) (Product : MSM514221B-xxJS)
    20-pin 400 mil plastic ZIP (ZIP20-P-400-1.27) (Product : MSM514221B-xxZS)
                                                                            xx indicates speed rank.