{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TMS55161-70DGH","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TMS55161-70DGH","canonicalUrl":"https://icboms.com/texas-instruments/TMS55161-70DGH","factsUrl":"https://icboms.com/api/mcp/products/TMS55161-70DGH","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TMS55161-70DGH, 256K x 16 Video DRAM, 70 ns access time, PDSO64 package, active lifecycle.","salesMarkdown":"## 70 ns access time — what it buys you in a frame buffer The TMS55161-70DGH is a 256K by 16 video DRAM from Texas Instruments with a 70 ns access time, packaged in a PDSO64. This is the faster bin of the TMS55161 family, shaving 10 ns off the cycle compared to the 80 ns suffix variant. In a graphics frame buffer where the memory bus is the bottleneck, that 10 ns margin lets you tighten the pixel clock timing or run at a higher resolution without redesigning the controller logic. The 256Kx16 organization maps cleanly onto a 16-bit RGB or YUV data path — one chip covers one colour channel per pixel. ## Active, but watch the lead-free constraint No last-time-buy clock is ticking. However, the RoHS compliance flag is marked non-compliant, which means it uses tin-lead solder on the terminations — not the matte-tin finish you get on modern lead-free parts. If your assembly line is RoHS-exempt for legacy repair or military/aerospace work, this is fine. If you need lead-free for new EU-market equipment, you will need to source it under a waiver or look at a RoHS-compliant alternative. ## PDSO64 — what you need for the footprint The PDSO64 is a 64-pin plastic small-outline package, the standard VRAM footprint from that era. Pin pitch and body dimensions match the JEDEC MO-119 outline. If you are replacing a failed part on an existing board, the orientation is marked by pin 1 chamfer on the package body — no lab needed to figure out the orientation. For a new layout, the land pattern is the same as any other 64-pin TSOP-II memory, so the footprint is not exotic.","metaTitle":"TMS55161-70DGH Video DRAM, 256Kx16, 70ns, PDSO64 – Active","metaDescription":"Texas Instruments TMS55161-70DGH video DRAM, 256Kx16 organization, 70ns access time, PDSO64 package. Active lifecycle, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":"*","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"*","Package":"Bulk","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.0","stockQuantity":0,"priceTiers":[{"qty":43,"price":"$7.00000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a632fb049944c557ae1eaad52b60c576.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How does TMS55161-70DGH compare to TMS55161-80DGH?","answer":"The only parametric difference between the two is the access time: 70 ns for the -70DGH versus 80 ns for the -80DGH. The -70DGH gives you a 10 ns faster cycle, which directly buys timing margin in the frame buffer controller. If your existing design uses the -80DGH and you have a few nanoseconds of slack, the -70DGH drops in as a straight speed upgrade — same package, same pinout, same density. If you are sourcing for a cost-sensitive build and the timing budget is comfortable, the -80DGH may be the cheaper option."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TMS55161-70DGH","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TMS55161-70DGH when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}