DESCRIPTION
The OKI MSM5412222 is a high performance 3-Mbit, 256K · 12-bit, Field Memory. It is especially designed for high-speed serial access applications such as HDTVs, conventional NTSC TVs, VTRs, digital movies and Multi-media systems. MSM5412222 is a FRAM for wide or low end use in general commodity TVs and VTRs exclusively. MSM5412222 is not designed for high end use in medical systems, professional graphics systems which require long term picture storage, data storage systems and others. Two or more MSM5412222s can be cascaded directly without any delay devices between them. (Cascading provides larger storage depth or a longer delay).
Each of the 12-bit planes has separate serial write and read ports. These employ independent control clocks to support asynchronous read and write operations. Different clock rates are also supported, which allow alternate data rates between write and read data streams.

FEATURES
• Single power supply : 5 V ±10%
• 512 Rows · 512 Columns · 12 bits
• Fast FIFO (First-In First-Out) operation
• High speed asynchronous serial access
   Read/write cycle time 25 ns/30 ns
   Access time 23 ns/25 ns
• Direct cascading capability
• Write mask function (Input enable control)
• Data skipping function (Output enable control)
• Self refresh (No refresh control is required)
• Package options:
   44-pin 400 mil plastic TSOP (Type II) (TSOPII44-P-400-0.80-K) (Product : MSM5412222-xxTS-K)
   40-pin 400 mil plastic SOJ (SOJ40-P-400-1.27)                     (Product : MSM5412222-xxJS)
                                                                      xx indicates speed rank.