256Kx16 Video DRAM with 70 ns access
The TMS55160-70DGH: This part sits in the Discrete Semiconductors category and is packaged in a 64-pin plastic small-outline (PDSO64) form factor supplied in Bulk. The 16-bit wide data bus and 70 ns cycle time target frame-buffer applications where the memory must keep pace with the pixel clock without wait states. A 70 ns access means the DRAM can deliver a new 16-bit word every 70 ns, which translates to a peak bandwidth of roughly 28.5 MB/s — adequate for standard-definition video pipelines of the era this part was designed for.
Lifecycle and compliance status
The part is marked RoHS non-compliant. For designs that require RoHS exemption or legacy leaded solder processes, this is a direct fit; for RoHS-mandated builds, a compliant alternative or an exemption waiver must be confirmed at the BOM level.
Sourcing and procurement note
No pin-compatible second-source or official successor is recorded in the manufacturer's cross-reference data.