DESCRIPTION
The OKI MSM518221 is a high performance 2-Mbit, 256K x 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. 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 : MSM518221-xxZS)
    28-pin 400 mil plastic SOJ (SOJ28-P-400-1.27) (Product : MSM518221-xxJS)
    28-pin 430 mil plastic SOP (SOP28-P-430-1.27-K) (Product : MSM518221-xxGS-K)
                                                                                  xx indicates speed rank.