256Kx16 video DRAM, 70 ns access — what it means for your frame buffer
The TMS55161-70ADGH is a 256Kx16 video DRAM from Texas Instruments, organized as 256K words by 16 bits. The 70 ns access time sets the read-cycle ceiling for the frame buffer — at 70 ns the maximum random read rate is roughly 14 MHz, which paces how fast the pixel data can be fetched per clock edge. Packaged in a 64-pin PDSO (thin shrink small-outline) body, the footprint suits dense board layouts where a standard SOIC would consume more real estate. The Bulk package option means parts are shipped in tubes or trays, not tape-and-reel — factor this into your pick-and-place setup if the line expects reel-fed components.