{"id":12338,"date":"2026-07-28T03:33:38","date_gmt":"2026-07-28T03:33:38","guid":{"rendered":"https:\/\/ic-vendor.com\/css1604su-mi\/"},"modified":"2026-07-28T03:33:38","modified_gmt":"2026-07-28T03:33:38","slug":"css1604su-mi","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/css1604su-mi\/","title":{"rendered":"CSS1604SU-MI"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The CSS1604SU-MI is a 16Mbit (2M x 8-bit) Quad-SPI Pseudo-SRAM (PSRAM) from Cascadeteq (\u51ef\u82af), operating at 1.62V to 3.6V with SPI\/QPI interface. It features clock rates up to 133 MHz (wrapped burst at 3.0V) and 109 MHz (at 3.3V), with self-managed refresh. The SU variant uses an ultra-compact USON-8L (3x2mm) package, and the MI suffix denotes industrial temperature range (-40\u00b0C to +85\u00b0C). It is positioned as a domestic (Chinese) alternative to imported PSRAM chips.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Density<\/td>\n16Mb (2M x 8 bits)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n1.62V to 3.6V<\/td>\n<\/tr>\n
Interface<\/td>\nSPI \/ QPI (SDR mode)<\/td>\n<\/tr>\n
Max Clock Rate<\/td>\n133 MHz (3.0V wrapped), 109 MHz (3.3V wrapped), 84 MHz (linear)<\/td>\n<\/tr>\n
Page Size<\/td>\n512 bytes<\/td>\n<\/tr>\n
Burst Mode<\/td>\nConfigurable wrap: 16\/32\/64\/512 bytes; Linear 512<\/td>\n<\/tr>\n
Refresh<\/td>\nSelf-managed<\/td>\n<\/tr>\n
Standby Current<\/td>\n35 \u00b5A typical @ 25\u00b0C, 150 \u00b5A max @ 85\u00b0C<\/td>\n<\/tr>\n
Output Drive<\/td>\nLVCMOS, programmable 50\/100\/200\u03a9<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nUSON-8L (3mm x 2mm)<\/td>\n<\/tr>\n
\u90e8\u4ef6\u72b6\u6001<\/td>\n\u6d3b\u8dc3<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 16Mb SPI\/QPI PSRAM \u2014 domestic alternative to imported PSRAM<\/li>\n
  • Self-managed refresh \u2014 no external DRAM refresh required<\/li>\n
  • Configurable wrap burst lengths: 16, 32, 64, 512 bytes<\/li>\n
  • Linear 512-byte burst up to 84 MHz with page boundary crossing<\/li>\n
  • Programmable output drive strength (50\/100\/200\u03a9)<\/li>\n
  • Ultra-compact USON-8L (3x2mm) package<\/li>\n
  • Software reset<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Wearable and IoT devices<\/li>\n
    • \u4fbf\u643a\u5f0f\u6d88\u8d39\u7535\u5b50\u4ea7\u54c1<\/li>\n
    • MCU external PSRAM (ESP32, STM32)<\/li>\n
    • Smart home and low-power devices<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The CSS1604SU-MI is a 16Mbit (2M x 8-bit) Quad-SPI Pseudo-SRAM (PSRAM) from Cascadeteq (\u51ef\u82af), operating at 1.62V to 3.6V with SPI\/QPI interface. It features clock rates up to 133 MHz (wrapped burst at 3.0V) and 109 MHz (at 3.3V), with self-managed refresh. The SU variant uses an ultra-compact USON-8L (3x2mm) package, and the […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,13],"tags":[3334],"chip_brand":[3333],"class_list":["post-12338","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","tag-css1604su-mi","chip_brand-cascadeteq"],"acf":{"brief_explanation":"16Mb SPI\/QPI PSRAM, 2Mx8, 1.62~3.6V, 133MHz, self-refresh, USON-8L (3x2mm), industrial","date_code":"","package_case":"USON-8L (3mm x 2mm)","in_stock":8765,"datasheet":"https:\/\/img1.wsimg.com\/blobby\/go\/8f892fc9-b89e-454a-b944-46373058ecd7\/downloads\/CSS1604L%2016Mbit%203.3V%20QSPI%20pSRAM..pdf","price":"","product_introduction":"The CSS1604SU-MI is a 16Mbit (2M x 8-bit) Quad-SPI Pseudo-SRAM from Cascadeteq (\u51ef\u82af), operating at 1.62V to 3.6V with SPI\/QPI interfaces and clock rates up to 133 MHz. The device features self-managed refresh, configurable wrap burst lengths (16\/32\/64\/512 bytes), programmable output drive strength, and software reset. The ultra-compact USON-8L (3x2mm) package and industrial temperature grade make it ideal for space-constrained IoT and wearable applications. It serves as a domestic (Chinese) alternative to imported PSRAM chips like the LY68L6400 and APS6404L.","working_principle":"The CSS1604SU operates as a serial pseudo-SRAM using an internal DRAM array with integrated self-refresh management. In SPI mode, data transfers serially via SI\/SIO[0] and SO\/SIO[1]. In QPI mode, all four SIO[0:3] lines transfer data simultaneously for 4x bandwidth. The internal refresh controller autonomously refreshes DRAM cells, making the device appear as SRAM to the host. Configurable wrap burst lengths (16\/32\/64\/512) and linear 512-byte burst with page boundary crossing provide flexibility for different access patterns. Programmable output drive strength (50\/100\/200\u03a9) allows signal integrity optimization.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>CE#<\/td>Input<\/td>Chip select, active low<\/td><\/tr>
      2<\/td>SO\/SIO[1]<\/td>I\/O<\/td>Serial output \/ Quad data[1]<\/td><\/tr>
      3<\/td>SIO[2]<\/td>I\/O<\/td>Quad data[2]<\/td><\/tr>
      4<\/td>VSS<\/td>Power<\/td>Ground<\/td><\/tr>
      5<\/td>SI\/SIO[0]<\/td>I\/O<\/td>Serial input \/ Quad data[0]<\/td><\/tr>
      6<\/td>CLK<\/td>Input<\/td>Clock signal<\/td><\/tr>
      7<\/td>SIO[3]<\/td>I\/O<\/td>Quad data[3]<\/td><\/tr>
      8<\/td>VDD<\/td>Power<\/td>Supply voltage<\/td><\/tr><\/table>","application_scenarios":"
      • ESP32 \/ STM32 external PSRAM for Wi-Fi\/display buffering<\/li>
      • Wearable device frame buffer in ultra-compact form factor<\/li>
      • IoT sensor data logging with low standby power<\/li>
      • Smart home appliance auxiliary memory<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Lyontek<\/td>LY68L3200SLIT<\/td>SOP-8<\/td>32Mb 3.3V PSRAM alternative<\/td><\/tr>
        APMemory<\/td>APS1604M-3SQR-SN<\/td>SOP-8<\/td>16Mb 3.3V PSRAM alternative<\/td><\/tr>
        Cascadeteq<\/td>CSS1604SS-MI<\/td>SOP-8<\/td>SOP8 package variant<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/12338","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=12338"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/12338\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=12338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=12338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=12338"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=12338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}