Functional Description
The SDA 9251 is a triple port 868 352 bit dynamic sequential-access memory for high-data-rate video applications. It is organized as 212 rows by 64 columns by 16 arrays by 4 bit to allow for the storage of 4-bit planes of a TV field (NTSC, PAL, SECAM, MAC) in standard or studio quality (13.5-MHz basic sample rate) or 4-bit planes of parts of a HDTV field. The memory is fabricated using the same CMOS technology used for 1-Mbit standard dynamic random access memories.

FEATUREs
● 212 x 64 x 16 x 4-bit organization
● Triple port architecture
● One 16 x 4-bit input shift register
● Two 16 x 4-bit output shift registers
● Shift registers independently and simultaneously
   accessible
● Continuous data flow even at maximum speed
● 33-MHz shift rate - 0.27-Gbit/s total data rate
● All inputs and outputs TTL-compatible
● Tristate outputs
● Random access of groups of 16 x 4 bits for a wide range
   of applications
● Refresh-free operation possible
● 5 V ± 10 % power supply
● 0 … 70 °C operating temperature range
● Low power dissipation: 550 mW active, 28 mW standby
● Suitable for all common TV standards
● Allows flicker and noise reduction simultaneously
   with only one field memory
● Applications: TV, VCR, image processing,
   video printers, data compressors, delay lines,
   time base correctors, HDTV