{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS80C323-END+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS80C323-END","canonicalUrl":"https://icboms.com/analog-devices/DS80C323-END","factsUrl":"https://icboms.com/api/mcp/products/DS80C323-END%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated 80C series, DS80C323-END+, 8-Bit 8051 MCU, 18 MHz, ROMless, 256 x 8 RAM, 2.7 V to 5.5 V, 32 I/O, EBI/EMI, SIO, UART/USART, -40°C to 85°C, 44-TQFP.","salesMarkdown":"## 8051 core at 18 MHz — ROMless by design The Maxim Integrated DS80C323-END+ is an 8-bit microcontroller built around the 8051 core, clocked at 18 MHz. It is a ROMless device — there is no on-chip program memory — so code must reside in external Flash, EPROM, or SRAM accessed through the EBI/EMI interface. The 256 x 8 bytes of internal RAM serve as scratchpad and register file. This architecture suits designs where the firmware image is large, field-updated via external memory, or already committed to a separate boot ROM. ## Supply flexibility and temperature grade The supply range spans 2.7 V to 5.5 V. The -40°C to 85°C industrial temperature range covers outdoor telecom cabinets, factory-floor controllers, and automotive-cabin modules. The 32 general-purpose I/O pins, plus the UART/USART and SIO serial interfaces, give enough connectivity for a sensor hub or a human-machine interface panel. ## Package and mounting Housed in a 44-pin TQFP (10x10 mm body) with surface-mount leads. The supplier device package is 44-TQFP (10x10). Standard reflow profile for a TQFP applies; no exposed thermal pad, so heat dissipation is through the leads and board copper. ## Peripherals and watchdog On-chip peripherals include a power-fail reset and a watchdog timer (WDT). The power-fail reset generates a clean reset when the supply drops below the trip threshold, which is useful for battery-backed or unreliable-mains designs. The WDT can be used to recover from firmware lockups without an external supervisor IC. ## Lifecycle and compliance The DS80C323-END+ carries an Active lifecycle status and is ROHS3 compliant.","metaTitle":"DS80C323-END+ 8051 MCU, 18 MHz, ROMless, 44-TQFP","metaDescription":"Maxim Integrated DS80C323-END+ 8-bit 8051 MCU at 18 MHz, ROMless, 256 x 8 RAM, 2.7-5.5 V, -40 to 85°C, 44-TQFP. Active, RoHS3.","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":"Tray","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-TQFP","Oscillator Type":"External","lifecycle_stage":"eol_hot","Program Memory Type":"ROMless","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"44-TQFP (10x10)","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":160,"price":"$8.23394","currency":"USD"},{"qty":320,"price":"$7.86388","currency":"USD"},{"qty":480,"price":"$7.17000","currency":"USD"},{"qty":960,"price":"$6.24483","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/DS80C320-DS80C323.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does the DS80C323-END+ have a built-in UART?","answer":"Yes. The connectivity block includes a UART/USART interface, plus an SIO (serial I/O) and an EBI/EMI bus for external memory access."},{"question":"What is the DS80C323-END+ equivalent?","answer":"The DS80C323-END+ is a ROMless 8051 MCU. A pin-compatible equivalent within the same 80C family would share the 44-TQFP footprint and the external-memory bus architecture. Confirm the exact peripheral set and supply range against your BOM before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS80C323-END","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-END 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}}