DESCRIPTION
The OKI MSM518221A is a high performance 2-Mbit, 256K · 8-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 MSM518221A 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 2-Mbit capacity fits one field of a conventional NTSC TV screen.

FEATURES
• Single power supply : 5 V ±10%
• 512 Rows x 512 Columns x 8 bits
• Fast FIFO (First-In First-Out) operation
• High speed asynchronous serial access
    Read/write cycle time 25 ns/30 ns/40 ns
    Access time 25 ns/25 ns/30 ns
• Functional compatibility with OKI MSM514221B
• Write mask function (Input enable control)
• Data skipping function (Output enable control)
• Self refresh (No refresh control is required)
• Package options :
    28-pin 400 mil plastic ZIP (ZIP28-P-400-1.27) (Product : MSM518221A-xxZS)
    28-pin 400 mil plastic SOJ (SOJ28-P-400-1.27) (Product : MSM518221A-xxJS)
    28-pin 430 mil plastic SOP (SOP28-P-430-1.27-K) (Product : MSM518221A-xxGS-K)
                                                                                  xx indicates speed rank.