{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS80C323-QCD+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS80C323-QCD","canonicalUrl":"https://icboms.com/analog-devices/DS80C323-QCD","factsUrl":"https://icboms.com/api/mcp/products/DS80C323-QCD%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated 80C series 8-bit 8051 MCU, DS80C323-QCD+, 18 MHz, ROMless, 256 x 8 RAM, 2.7 V to 5.5 V, 32 I/O, 44-PLCC, 0°C to 70°C.","salesMarkdown":"## What the DS80C323-QCD+ is and where it fits The Maxim Integrated DS80C323-QCD+ is an 8-bit microcontroller built around the 8051 core, clocked at 18 MHz. It is a ROMless device — no on-chip program memory — so code resides in an external EPROM, Flash, or OTP memory accessed through the external bus interface. This makes it a fit for designs where the firmware is fixed at the factory or where a separate memory device is already on the board for other functions. The part integrates 256 x 8 bytes of internal RAM, 32 I/O lines, a power-fail reset, and a watchdog timer. Connectivity includes an external bus interface (EBI/EMI), a serial I/O (SIO), and a UART/USART. Packaged in a 44-lead PLCC with J-leads (44-PLCC, 16.59 x 16.59 mm body), it is intended for surface-mount assembly. The commercial temperature range of 0°C to 70°C limits it to indoor, controlled environments. ## ROMless architecture — BOM implications Because the DS80C323-QCD+ has no program memory on-chip, every design must budget for an external EPROM, Flash, or OTP memory. That adds a second IC, extra board area, and a separate programming step during manufacturing. The trade-off is flexibility: the external memory can be swapped for a different density or supplier without changing the MCU, and firmware updates can be handled by replacing the memory device — or, if using Flash, by in-system programming through the UART or SIO. ## Lifecycle and sourcing posture This reduces sourcing risk for new designs and ongoing production runs. Maxim Integrated (now part of Analog Devices) is the sole manufacturer for this part. There is no second-source listed in the available records, so the BOM carries single-source exposure on the MCU itself. The part is RoHS3 compliant.","metaTitle":"Maxim DS80C323-QCD+ 8-bit MCU, 18 MHz, ROMless, 44-PLCC","metaDescription":"Maxim DS80C323-QCD+ 8-bit 8051 MCU, 18 MHz, ROMless, 256 x 8 RAM, 2.7 V to 5.5 V, 44-PLCC. Active lifecycle.","metaKeywords":null},"attributes":{"series":"80C","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Speed":"18MHz","Series":"80C","Package":"Tube","RAM Size":"256 x 8","Core Size":"8-Bit","Peripherals":"Power-Fail Reset, WDT","Connectivity":"EBI/EMI, SIO, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"32","Core Processor":"8051","Package / Case":"44-LCC (J-Lead)","Oscillator Type":"External","lifecycle_stage":"eol_hot","Program Memory Type":"ROMless","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"44-PLCC (16.59x16.59)","Voltage - Supply (Vcc/Vdd)":"2.7V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.01","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$11.01000","currency":"USD"},{"qty":10,"price":"$9.94500","currency":"USD"},{"qty":25,"price":"$9.48280","currency":"USD"},{"qty":100,"price":"$8.23390","currency":"USD"},{"qty":250,"price":"$7.86384","currency":"USD"},{"qty":500,"price":"$7.17000","currency":"USD"},{"qty":1000,"price":"$6.24483","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/DS80C320-DS80C323.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the DS80C323-QCD+ in tube packaging?","answer":"The DS80C323-QCD+ is available to order through independent distribution. It is sourced and quoted against an RFQ, with availability and current pricing confirmed at the time of quote. Tube packaging is the standard shipping medium for this PLCC part."},{"question":"Is the DS80C323-QCD+ obsolete or end of life?","answer":"No. The DS80C323-QCD+ has an official Active lifecycle status with no announced end-of-life or last-time-buy schedule. It is suitable for new designs and ongoing production."},{"question":"What is the closest pin-compatible alternative to the DS80C323-QCD+?","answer":"Within the Maxim 80C family, the DS80C320 series shares the same 8051 core and 44-PLCC package, but those parts include on-chip ROM or EPROM variants. A direct pin-compatible ROMless sibling is the DS80C323-QND+ (same die, different ordering code). For a cross-vendor alternative, the AT89C51 from Microchip is a common 8051 derivative, but it uses a different package (40-pin DIP or 44-pin PLCC) and includes on-chip Flash, so a board redesign would be required."},{"question":"Is the DS80C323-QCD+ compatible with 8051 compilers?","answer":"Yes. The DS80C323-QCD+ uses the standard 8051 core, so it is fully compatible with all major 8051 C compilers (Keil, IAR, SDCC) and assemblers. The 18 MHz clock speed is within the range supported by these toolchains."},{"question":"What is the DS80C323-QCD+'s listed speed?","answer":"The maximum clock speed is 18 MHz. This determines the instruction cycle time — at 18 MHz, most instructions execute in 1 to 4 clock cycles, giving a throughput of roughly 4.5 to 18 MIPS depending on the instruction mix."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS80C323-QCD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS80C323-QCD 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}}