{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TMS370C156AFNT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TMS370C156AFNT","canonicalUrl":"https://icboms.com/texas-instruments/TMS370C156AFNT","factsUrl":"https://icboms.com/api/mcp/products/TMS370C156AFNT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TMS370 series, TMS370C156AFNT, 8-bit MCU, ROMless, 5 MHz, SCI, SPI, 46 I/O, 8x8b ADC, 4.5 V supply, -40°C to 105°C, 68-PLCC.","salesMarkdown":"The TMS370C156AFNT: It runs at 5 MHz and is supplied in a 68-pin PLCC package for surface-mount assembly. The part is ROMless — it has no internal program memory — so code must reside in external ROM, EPROM, or Flash accessed via the external bus. With 46 general-purpose I/O lines, an 8-channel 8-bit ADC, and serial interfaces (SCI and SPI), it targets industrial control and embedded systems where the designer controls the memory map and firmware is factory-programmed or loaded from an external serial Flash. Because the TMS370C156AFNT is ROMless, every design using it must budget for an external memory device (typically a parallel EPROM or Flash) to hold the application code. This adds a second IC, extra PCB area, and a separate programming step. The trade-off is flexibility: you can change the firmware by swapping the external memory without respinning the MCU, and the external memory can be larger than any on-chip ROM the TMS370 family offered. For a production line, this means qualifying two components instead of one, and ensuring the external memory is available for the product's lifetime. ## Industrial temperature grade and peripheral set The on-chip peripherals include a PWM generator, a watchdog timer (WDT), and an 8-channel 8-bit ADC — enough for basic sensor readout and motor-speed control. ## Lifecycle and sourcing posture No last-time-buy risk is indicated on the current record.","metaTitle":"TI TMS370C156AFNT 8-bit MCU, ROMless, 5 MHz, 68-PLCC","metaDescription":"Texas Instruments TMS370C156AFNT 8-bit MCU with 5 MHz clock, ROMless, 46 I/O, SCI/SPI, 8x8b ADC, -40°C to 105°C. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"series":"TMS370","has_mpn":"TMS370C","cpu_core":"TMS370","frame_size":"8-Bit","fuse_speed":"5 MHz","connectivity":"SCI, SPI","package_type":"Bulk","Number Of I/O":"46","mounting_type":"Surface Mount","product_status":"Active","Data Converters":"A/D 8x8b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","peripheral_types":"PWM, WDT","supply_voltage_v":"4.5","Program Memory Type":"ROMless","Operating Temperature High":"-40°C to 105°C (TA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.24","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/42812f50de26247265f6672203e19d42.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does TMS370C156AFNT require external memory?","answer":"Yes, the TMS370C156AFNT is ROMless, meaning it has no internal program memory. All application code must be stored in an external parallel ROM, EPROM, or Flash device."},{"question":"What package is TMS370C156AFNT?","answer":"It comes in a 68-pin PLCC (Plastic Leaded Chip Carrier) for surface-mount assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TMS370C156AFNT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TMS370C156AFNT 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}}