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STM8S105K4B6 8-Bit 16MHz MCU 16KB Flash | STMicroelectronics

Артикул: STM8S105K4B6 ✓ Активен
В наличии Отправка в течение 1–3 рабочих дней
32-SDIP (0.400 inch, 10.16 mm) Package 16 MHz Speed 16 KB (16K x 8) Memory
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Цена обновлена: 2026-10-23
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STM8S105K4B6 Обзор

The STMicroelectronics STM8S105K4B6 is an 8-bit STM8S series microcontroller operating at 16 MHz, with 16 KB of Flash program memory and 2 KB of RAM, housed in a 32-pin SDIP package. It belongs to the STM8S105x4/6 access-line family, which combines integrated data EEPROM, a 10-bit ADC, timers, UART, SPI, and I2C in an 8-bit embedded-control device.

What is an 8-bit microcontroller? An 8-bit MCU is a compact embedded processor whose internal bus and arithmetic operations are organized around eight-bit data. STM8 devices sit within the broader semiconductor and microcontroller hierarchy and are commonly used for cost-sensitive control, sensing, communications, and actuator-control systems. The STM8S105K4B6 provides enough Flash and RAM for compact embedded applications without requiring a higher-complexity processor.

Key features include an 8-bit architecture, 16 MHz maximum clocking, 16 KB Flash, 2 KB RAM, and 25 I/O according to the verified distributor specifications. The device also includes a 10-bit ADC, UART, SPI, I2C, timers, and integrated true data EEPROM. These peripherals enable local sensing, serial communication, and motor or relay control while keeping the design compact.

The STM8S105K4B6 is identified as part of the STM8S105x4/6 access line, with the manufacturer describing the family as offering 16 to 32 KB Flash and integrated true data EEPROM. The verified product-page result specifically associates this MPN with a 32-SDIP package, 0.400 inch, 10.16 mm. Exact operating voltage, temperature limits, ADC accuracy details, timer ratings, and electrical timing values are not included in the supplied verified data and must be checked against the manufacturer datasheet.

Typical applications include small industrial controllers, sensor nodes, serial-interface equipment, LED-control boards, compact instrumentation, and embedded systems using UART, SPI, or I2C. The 16 MHz clock speed supports responsive control-loop execution, while the 10-bit ADC is useful for analog monitoring. A designer should confirm memory-map compatibility, peripheral availability, startup behavior, and electrical limits before replacing another STM8 device in an existing design.

For implementation, begin with the manufacturer datasheet and reference manual for exact pin assignments, register definitions, clock settings, and peripheral constraints. Use the official STMicroelectronics product page as the primary lifecycle and family reference. This page synthesizes verified distributor specifications, procurement information, application context, and replacement guidance without inventing unavailable electrical details.

Аналоги без доработки для STM8S105K4B6 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.

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Для этого товара нет аналогов без доработки.

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STM8S105K4B6 Максимальные параметры и электрические характеристики

Product Type 8-bit microcontroller
Microcontroller Family STM8S series
Access-Line Family STM8S105x4/6
Максимальная тактовая частота 16 MHz
Flash Program Memory 16 KB (16K x 8)
RAM 2 KB (2K x 8)
Number of I/O 25
Корпус 32-SDIP (0.400 inch, 10.16 mm)
Количество выводов 32
ADC 10-bit ADC
Communication Interfaces UART, SPI, I2C
Timers Integrated timers
Data Storage Integrated true data EEPROM
Product Family Flash Range 16 KB to 32 KB
Architecture 8-bit
Способ монтажа Through-hole SDIP
Manufacturer Product Description STM8S105x4/6 access line 8-bit microcontroller
ADC Resolution 10-bit

Руководство по цоколевке STM8S105K4B6 в корпусе 32-sdip (0.400 inch, 10.16 mm)

Цоколевка для STM8S105K4B6 (корпус 32-sdip (0.400 inch, 10.16 mm)). Эта цифровая ИС включает выводы GPIO, интерфейсы связи (UART, SPI, I2C) и выводы питания. Обратитесь к техническому описанию производителя для альтернативных функций выводов и вариантов конфигурации. Необходимо для проектирования встраиваемых систем и трассировки печатных плат.

Схема цоколевки корпуса 32-sdip (0.400 inch, 10.16 mm) для STM8S105K4B6

Нет подробных данных о распиновке для STM8S105K4B6.

Обратитесь к даташиту для полной конфигурации выводов.

Типичное применение

STM8S105K4B6 подходит для 6 применениеs: Compact Sensor Interface, UART-Based Embedded Controller, LED and Indicator Control, Small Industrial Control Board, Serial Protocol Bridge, Portable Instrumentation Controller.

🧩

Compact Sensor Interface

The STM8S105K4B6 fits compact sensor interfaces because it combines a 10-bit ADC, 16 MHz processing clock, and 2 KB RAM in a single microcontroller. A practical design can read analog sensor outputs, apply filtering or threshold logic, and report results through UART or I2C. The ADC provides a defined conversion resolution, while the serial interfaces allow connection to a host controller or display. The supplied data does not specify ADC input count or accuracy, so engineers should confirm those details in the manufacturer documentation before selecting input channels or setting timing margins.

🌐

UART-Based Embedded Controller

The STM8S105K4B6 is suitable for a local UART controller because it operates at up to 16 MHz and includes UART support according to the verified datasheet-search result. It can receive commands, evaluate control states, and drive discrete outputs without a higher-performance processor. The 16 KB Flash and 2 KB RAM provide a constrained but workable firmware budget for compact protocol handlers. Exact baud-rate support, peripheral register behavior, and pin multiplexing must be verified from the STMicroelectronics reference documentation.

💡

LED and Indicator Control

For LED panels, status indicators, and compact display-control boards, the STM8S105K4B6 provides a simple 8-bit control platform with timers, GPIO, and serial interfaces. Timers can support periodic updates or timing functions, while UART or I2C can accept commands from another controller. The 32-SDIP package is practical for through-hole prototypes and conventional industrial control boards. Before driving LEDs directly, verify current limits and pin electrical characteristics from the official datasheet; the supplied data does not specify per-pin current ratings.

🏭

Small Industrial Control Board

The STM8S105K4B6 is appropriate for small industrial control boards that need deterministic embedded logic, analog monitoring, and serial diagnostics. Its 16 MHz clock supports responsive handling of button states, relay or actuator commands, and sensor thresholds, while the ADC can monitor process variables. The through-hole 32-SDIP package simplifies prototype assembly and inspection compared with a very small surface-mount package. A production design should still confirm operating temperature, supply range, isolation, safety, and regulatory requirements, none of which were supplied in the verified data.

🔧

Serial Protocol Bridge

STM8S105K4B6 can serve as a compact protocol-conversion or bridging MCU when one side uses UART and another side uses SPI or I2C. The 10-bit ADC and timers can support auxiliary monitoring or periodic control functions alongside the communication task. Its 16 KB Flash limits very large protocol stacks, so firmware should be sized against the selected library and buffering strategy. Because the supplied data does not include maximum baud rates, peripheral mappings, or timing guarantees, validate the protocol implementation against the STMicroelectronics reference manual.

📟

Portable Instrumentation Controller

The STM8S105K4B6 can be used in portable instrumentation or test fixtures that combine analog measurement with a local embedded user interface. The 10-bit ADC supports basic measurement tasks, while UART and I2C can connect to displays, sensors, or a host computer. The 16 MHz clock provides a responsive control platform without requiring a high-power processor. Designers should account for sensor excitation, input filtering, calibration, and safe power sequencing; those application-specific requirements are not defined in the supplied manufacturer data.

What are the key specifications of STM8S105K4B6 that engineers should know?
The STM8S105K4B6 is an 8-bit STM8S-series microcontroller rated at 16 MHz, with 16 KB of Flash program memory, 2 KB of RAM, and 25 I/O in a 32-SDIP package. The verified STM8S105x4/6 family information also identifies integrated true data EEPROM, a 10-bit ADC, UART, SPI, I2C, and timers. Exact supply-voltage and temperature limits were not included in the supplied verified data, so consult the manufacturer datasheet before final design release.
What is the operating frequency of STM8S105K4B6?
The STM8S105K4B6 operates at a maximum clock frequency of 16 MHz, as stated in the verified DigiKey and datasheet-search results. This frequency determines the processor execution baseline and should be considered when sizing control-loop timing, communication tasks, and peripheral activity. The supplied data does not specify the allowable clock-source configuration or operating-voltage window, so those details require the manufacturer datasheet.
How much Flash and RAM does STM8S105K4B6 have?
The STM8S105K4B6 provides 16 KB of Flash program memory and 2 KB of RAM. The verified DigiKey result describes the Flash as 16 KB, or 16K x 8, and the verified DigChips result identifies 2K x 8 RAM. These resources position the device for compact embedded-control firmware, but actual firmware fit depends on the selected toolchain, linker configuration, bootloader, and application requirements.
What peripherals are integrated in STM8S105K4B6?
The STM8S105K4B6 integrates a 10-bit ADC, UART, SPI, I2C, timers, and true data EEPROM. These peripherals support analog measurement, serial communications, external-device interfacing, timing, and retained data storage without requiring separate discrete functions. The verified data does not provide channel counts, timer widths, baud-rate limits, or EEPROM capacity, so use the STMicroelectronics datasheet for those detailed ratings.
What package does STM8S105K4B6 use?
The STM8S105K4B6 uses a 32-SDIP through-hole package measuring 0.400 inch, or 10.16 mm, according to the verified product listings. This package is suitable for conventional through-hole PCB layouts and prototyping rather than compact surface-mount assemblies. Because package dimensions and pin assignments must match the physical PCB footprint, verify the official package drawing and pinout before ordering or substituting a component.
Is STM8S105K4B6 suitable for sensor and control applications?
The STM8S105K4B6 is suitable for small sensor-and-control systems that need local analog measurement and serial connectivity. Its 10-bit ADC can monitor analog inputs, while UART, SPI, and I2C provide paths to sensors, displays, actuators, or external controllers. The 16 MHz clock and 2 KB RAM are appropriate for compact embedded tasks, although exact sensor accuracy and real-time performance depend on the application and are not fully specified in the supplied data.
Can STM8S105K4B6 replace another STM8 microcontroller?
A replacement can be considered only after checking package pinout, memory size, clock configuration, peripheral availability, interrupt vectors, startup code, and electrical limits. The verified cross-reference search did not identify a verified pin-to-pin replacement for STM8S105K4B6. Therefore, STM8S105K4B6 should not be treated as a confirmed drop-in replacement for an unspecified STM8 device without a direct manufacturer or distributor comparison.
What can replace STM8S105K4B6?
No verified drop-in replacement was established in the supplied cross-reference data for STM8S105K4B6. The search returned generic cross-reference tools and the STM8S105K4 family page, but no manufacturer-confirmed or distributor-confirmed 32-SDIP part with matching pinout and parameters. A practical replacement search should use the exact package, 16 MHz class, Flash and RAM requirements, ADC, UART, SPI, I2C, timer set, and supply constraints as non-negotiable comparison criteria.
Where can I download the STM8S105K4B6 datasheet?
The official STMicroelectronics product page is the preferred starting point for the STM8S105K4B6 datasheet and family documentation. The supplied search results also identify a manufacturer-origin PDF mirror and several distributor-hosted datasheet pages. Download the current document from STMicroelectronics and verify the exact device variant, package, electrical limits, pin assignments, and revision information before using it for design or certification.
Where can I find the STM8S105K4B6 pinout?
The STM8S105K4B6 pinout should be taken from the official STMicroelectronics datasheet package drawing and pin description, with the 32-SDIP footprint checked against the selected PCB layout. The verified results identify the package as 32-SDIP, 0.400 inch, 10.16 mm, but they do not provide the complete numbered pin list. Do not infer individual pin functions from a marketplace image without comparing it to the official documentation.
How much does STM8S105K4B6 cost?
The verified Heisener result lists STM8S105K4B6 at a unit price of $1.3512 for reference, while other search results point to distributor price and inventory pages without exposing a complete price table. Prices can vary by quantity, supplier, and date; the quoted value should therefore be treated as the referenced listing as of the supplied 2026-10-23 verification date. Obtain a current quotation before procurement.
Where can I buy STM8S105K4B6 online?
The verified search results identify DigiKey, Octopart, DiGi-Electronics, and other distributor listings for STM8S105K4B6. DigiKey lists the component as available for purchase in its result snippet, while Heisener reported 6,032 pieces and a lead time requiring confirmation. Stock and pricing change frequently, so check the distributor’s live inventory, authorized status, and exact package suffix before issuing a purchase order.
Is STM8S105K4B6 in stock?
The supplied distributor snippets indicate purchase availability, and the Heisener result reported 6,032 pieces, but these are time-sensitive snapshots rather than a live XAIPART stock guarantee. The verified data does not establish XAIPART inventory or a committed lead time. Confirm stock, date code, authorized distribution, and shipment timing with the selected supplier before relying on the component for production.
What is the lead time for STM8S105K4B6?
The verified Heisener listing states that the lead time is to be confirmed and gives an estimated delivery window, so no reliable production lead time can be quoted from the supplied data. Other distributor snippets indicate that STM8S105K4B6 is offered for purchase, but they do not provide a standardized lead-time value. Ask the supplier for a written quotation and confirm whether the quoted date applies to the requested quantity and package.
Is STM8S105K4B6 RoHS and REACH compliant?
The supplied verified data does not state the RoHS or REACH status of STM8S105K4B6, so compliance must be confirmed from STMicroelectronics or the authorized distributor product documentation. Do not infer compliance from the manufacturer name or from an online listing alone. For a regulated design, request the current declaration, material documentation, and applicable quality or regulatory records for the exact ordered MPN.
Is STM8S105K4B6 the same as STM8S105K4T3C?
STM8S105K4B6 and STM8S105K4T3C are not confirmed as interchangeable by the supplied data. The verified Findchips result only provides a comparison page and does not establish matching package, temperature grade, pinout, or device variant. Compare the official ordering-information table, package suffix, temperature range, and datasheet for both MPNs before treating either part as a replacement.
What is STM8S105K4B6 used for?
STM8S105K4B6 is used for compact embedded-control, sensing, and serial-communication designs. Its 8-bit processor, 16 MHz clock, 10-bit ADC, UART, SPI, I2C, timers, and integrated data EEPROM make it suitable for local control boards, sensor interfaces, communication modules, and small industrial peripherals. The exact application suitability still depends on required I/O, voltage range, temperature range, memory use, and certification requirements not fully present in the verified data.
Does STM8S105K4B6 support UART, SPI, and I2C?
Yes. The verified STM8S105K4B6 datasheet-search result identifies UART, SPI, and I2C among the device’s integrated peripherals, alongside a 10-bit ADC, timers, and true data EEPROM. These interfaces support common embedded-system connections, but peripheral channel counts, alternate-function mappings, and operating conditions must be checked in the official datasheet and reference manual before assigning pins or designing a board.

Справочные инженерные данные для STM8S105K4B6 — сравнение, рекомендации по проектированию и информация о соответствии.

Руководство по выбору

Choose STM8S105K4B6 when a design needs an 8-bit STM8S controller with 16 MHz operation, 16 KB Flash, 2 KB RAM, a 10-bit ADC, UART, SPI, I2C, timers, and true data EEPROM in a 32-SDIP through-hole package. It is well suited to compact prototypes, small control boards, sensor interfaces, and serial communication equipment. Do not select it as a drop-in replacement for another MCU unless the exact pinout, package, memory, peripherals, supply limits, temperature range, and startup behavior are verified. The supplied cross-reference search did not establish a confirmed alternative, so design reuse should remain conditional on official documentation.

Сравнение с аналогами

Параметр Этот товар
Package 32-SDIP (0.400 inch, 10.16 mm)
Brand STMicroelectronics
Architecture 8-bit
Maximum Clock Frequency 16 MHz
Flash Program Memory 16 KB
RAM 2 KB
Number of I/O 25
ADC 10-bit
Communication Interfaces UART, SPI, I2C
Data Storage Integrated true data EEPROM

Ключевые отличия

  • 16 MHz STM8S processing performance (против ATMEGA8A-AUR)
  • Integrated true data EEPROM (против ATMEGA328-AU)
  • Communication peripheral set (против STM8S105K4T3C)

Заметки по проектированию

Before powering the STM8S105K4B6, verify the exact supply-voltage range, decoupling requirements, reset behavior, and input tolerances in the official STMicroelectronics datasheet. Place the required supply and bypass capacitors close to the relevant power pins, and keep analog and digital return-current paths controlled. The verified data does not provide voltage limits or capacitor values, so do not substitute values from another STM8 device without checking the exact device documentation.

Use the official 32-SDIP footprint and pin description when laying out the PCB. Confirm pin 1 orientation, package row spacing, and every alternate-function assignment against the manufacturer drawing. Keep clock, reset, programming, and communication traces away from noisy switching nodes where practical. Because the supplied verified data confirms the package family but not the complete numbered pinout, schematic capture must be checked against the official datasheet.

Do not treat STM8S105K4B6 as a generic pin-compatible substitute for another STM8 device without checking the exact suffix and ordering information. Compare package, temperature range, memory size, peripheral set, clock settings, interrupt behavior, and startup requirements. The verified cross-reference search found no confirmed drop-in replacement, so firmware and PCB changes should be treated as a redesign unless an authorized source explicitly confirms compatibility.

Информация о соответствии

RoHS
Unknown
REACH
Unknown
AEC-Q100
Unknown
Без свинца
Unknown
Без галогенов
Unknown
Конфликтные минералы
Unknown

The supplied verified data does not include RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Confirm current compliance documentation with STMicroelectronics or an authorized distributor for the exact ordered part.

Данные проверены: 2026-10-23 — данные проверены и курируются командой компонентной инженерии XAIPART

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Связанные компоненты & термины

STMicroelectronics STM8S105K4B6 STM8S105K4 STM8S series 8-bit microcontroller microcontroller embedded controller semiconductor 16 MHz Flash program memory RAM 10-bit ADC UART SPI I2C true data EEPROM timers 32-SDIP sensor interface industrial control board serial communication through-hole package STMicroelectronics STM8S105x4/6 access line
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